|
OT: Odd noise question Ford Superduty
Posted this over on alt.ford.trucks yesterday, thought I would pick the
brains of this group as well. WARNING TO CHARTER POLICE! This is about a Ford pickup. Move on to the next thread if you are offended. :-) 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in North Michigan to my home in Southeast Michigan, about a 3 hour drive. When I stopped for lunch at about the halfway point, I could hear a fast 'tck-tck-tck-tck" that varied with engine speed. By the time I got out and opened the hood, the noise was gone. OK, thought it might be a sticky injector, didn't seem to harm the engine, and it did go away. Never heard it before or after at street or highway speeds. No dash lights came on at any time. I mention the trailer because I was driving almost the whole way with the overdrive disabled, so the engine was running about 2700 rpm at highway speeds. And it was warm today, ambient temp was about 85 degrees F. So when I get home, after getting off the e-way, I have about 3 miles to go, up a couple of hills. When I got to the house, I heard it again, and this time I got right out and opened the hood. Not coming from the top of the engine, so I got underneath. It sounded like it was coming from the right side of bottom of the engine. It could have been coming from the transmission, but it was difficult to tell...I was using a long wooden dowel against my ear, checking different locations, to isolate the noise. But after about 2 minutes of idling, it went away again! My first guess is a possible leaking exhaust manifold, as (a) I live in the Rust Belt and my exhaust system is becoming more oxide than iron , (b) the exhaust has always had a resonance rattle at about 2000 rpm since new (the Y-pipe back had been replaced under warranty twice and it always came back) and (c) I am hoping like hell it's not inside the engine. I didn;'t get a chance to check the manifold before the noise stopped, but I did check the Y-pipes under the pan and that was inconclusive. My guess is after running at street speeds for a few minutes (and towing the trailer), the exhaust was heating up more than it did at highway speeds (with less airflow to help cool it), and something in the exhaust was expanding enough to cause a leak. After it idled a little, it cooled back down and stopped leaking. I drove around without the trailer and it never came back. All fluid levels OK, oil pressure is there but of course without hooking up a gauge I don't know the exact pressure (thanks Ford). Any other suggestions? -- --- Matt Macchiarolo mlmacchiarolo at comcast dot net AIM screen name RTI1182 "We must not confuse dissent with disloyalty." -Edward R. Murrow Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Hi Matt,
I would turn up the stereo, and say you have normal expansion and contraction or exhaust pipes and the their heat shields. Forget it. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Matt Macchiarolo wrote: > > Posted this over on alt.ford.trucks yesterday, thought I would pick the > brains of this group as well. WARNING TO CHARTER POLICE! This is about a > Ford pickup. Move on to the next thread if you are offended. :-) > > 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded > with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in > North Michigan to my home in Southeast Michigan, about a 3 hour drive. When > I stopped for lunch at about the halfway point, I could hear a fast > 'tck-tck-tck-tck" that varied with engine speed. By the time I got out and > opened the hood, the noise was gone. OK, thought it might be a sticky > injector, didn't seem to harm the engine, and it did go away. Never heard it > before or after at street or highway speeds. No dash lights came on at any > time. > > I mention the trailer because I was driving almost the whole way with the > overdrive disabled, so the engine was running about 2700 rpm at highway > speeds. And it was warm today, ambient temp was about 85 degrees F. > > So when I get home, after getting off the e-way, I have about 3 miles to go, > up a couple of hills. When I got to the house, I heard it again, and this > time I got right out and opened the hood. Not coming from the top of the > engine, so I got underneath. It sounded like it was coming from the right > side of bottom of the engine. It could have been coming from the > transmission, but it was difficult to tell...I was using a long wooden dowel > against my ear, checking different locations, to isolate the noise. But > after about 2 minutes of idling, it went away again! > > My first guess is a possible leaking exhaust manifold, as (a) I live in the > Rust Belt and my exhaust system is becoming more oxide than iron , (b) the > exhaust has always had a resonance rattle at about 2000 rpm since new (the > Y-pipe back had been replaced under warranty twice and it always came back) > and (c) I am hoping like hell it's not inside the engine. I didn;'t get a > chance to check the manifold before the noise stopped, but I did check the > Y-pipes > under the pan and that was inconclusive. My guess is after running at street > speeds for a few minutes (and towing the trailer), the exhaust was heating > up more than it did at highway speeds (with less airflow to help cool it), > and something in the exhaust was expanding enough to cause a leak. After it > idled a little, it cooled back down and stopped leaking. I drove around > without the trailer and it never came back. All fluid levels OK, oil > pressure is there but of course without hooking up a gauge I don't know the > exact pressure (thanks Ford). > > Any other suggestions? > > -- > --- > Matt Macchiarolo > mlmacchiarolo at comcast dot net > AIM screen name RTI1182 > > "We must not confuse dissent with disloyalty." -Edward R. Murrow > Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Hi Matt,
I would turn up the stereo, and say you have normal expansion and contraction or exhaust pipes and the their heat shields. Forget it. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Matt Macchiarolo wrote: > > Posted this over on alt.ford.trucks yesterday, thought I would pick the > brains of this group as well. WARNING TO CHARTER POLICE! This is about a > Ford pickup. Move on to the next thread if you are offended. :-) > > 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded > with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in > North Michigan to my home in Southeast Michigan, about a 3 hour drive. When > I stopped for lunch at about the halfway point, I could hear a fast > 'tck-tck-tck-tck" that varied with engine speed. By the time I got out and > opened the hood, the noise was gone. OK, thought it might be a sticky > injector, didn't seem to harm the engine, and it did go away. Never heard it > before or after at street or highway speeds. No dash lights came on at any > time. > > I mention the trailer because I was driving almost the whole way with the > overdrive disabled, so the engine was running about 2700 rpm at highway > speeds. And it was warm today, ambient temp was about 85 degrees F. > > So when I get home, after getting off the e-way, I have about 3 miles to go, > up a couple of hills. When I got to the house, I heard it again, and this > time I got right out and opened the hood. Not coming from the top of the > engine, so I got underneath. It sounded like it was coming from the right > side of bottom of the engine. It could have been coming from the > transmission, but it was difficult to tell...I was using a long wooden dowel > against my ear, checking different locations, to isolate the noise. But > after about 2 minutes of idling, it went away again! > > My first guess is a possible leaking exhaust manifold, as (a) I live in the > Rust Belt and my exhaust system is becoming more oxide than iron , (b) the > exhaust has always had a resonance rattle at about 2000 rpm since new (the > Y-pipe back had been replaced under warranty twice and it always came back) > and (c) I am hoping like hell it's not inside the engine. I didn;'t get a > chance to check the manifold before the noise stopped, but I did check the > Y-pipes > under the pan and that was inconclusive. My guess is after running at street > speeds for a few minutes (and towing the trailer), the exhaust was heating > up more than it did at highway speeds (with less airflow to help cool it), > and something in the exhaust was expanding enough to cause a leak. After it > idled a little, it cooled back down and stopped leaking. I drove around > without the trailer and it never came back. All fluid levels OK, oil > pressure is there but of course without hooking up a gauge I don't know the > exact pressure (thanks Ford). > > Any other suggestions? > > -- > --- > Matt Macchiarolo > mlmacchiarolo at comcast dot net > AIM screen name RTI1182 > > "We must not confuse dissent with disloyalty." -Edward R. Murrow > Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Hi Matt,
I would turn up the stereo, and say you have normal expansion and contraction or exhaust pipes and the their heat shields. Forget it. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Matt Macchiarolo wrote: > > Posted this over on alt.ford.trucks yesterday, thought I would pick the > brains of this group as well. WARNING TO CHARTER POLICE! This is about a > Ford pickup. Move on to the next thread if you are offended. :-) > > 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded > with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in > North Michigan to my home in Southeast Michigan, about a 3 hour drive. When > I stopped for lunch at about the halfway point, I could hear a fast > 'tck-tck-tck-tck" that varied with engine speed. By the time I got out and > opened the hood, the noise was gone. OK, thought it might be a sticky > injector, didn't seem to harm the engine, and it did go away. Never heard it > before or after at street or highway speeds. No dash lights came on at any > time. > > I mention the trailer because I was driving almost the whole way with the > overdrive disabled, so the engine was running about 2700 rpm at highway > speeds. And it was warm today, ambient temp was about 85 degrees F. > > So when I get home, after getting off the e-way, I have about 3 miles to go, > up a couple of hills. When I got to the house, I heard it again, and this > time I got right out and opened the hood. Not coming from the top of the > engine, so I got underneath. It sounded like it was coming from the right > side of bottom of the engine. It could have been coming from the > transmission, but it was difficult to tell...I was using a long wooden dowel > against my ear, checking different locations, to isolate the noise. But > after about 2 minutes of idling, it went away again! > > My first guess is a possible leaking exhaust manifold, as (a) I live in the > Rust Belt and my exhaust system is becoming more oxide than iron , (b) the > exhaust has always had a resonance rattle at about 2000 rpm since new (the > Y-pipe back had been replaced under warranty twice and it always came back) > and (c) I am hoping like hell it's not inside the engine. I didn;'t get a > chance to check the manifold before the noise stopped, but I did check the > Y-pipes > under the pan and that was inconclusive. My guess is after running at street > speeds for a few minutes (and towing the trailer), the exhaust was heating > up more than it did at highway speeds (with less airflow to help cool it), > and something in the exhaust was expanding enough to cause a leak. After it > idled a little, it cooled back down and stopped leaking. I drove around > without the trailer and it never came back. All fluid levels OK, oil > pressure is there but of course without hooking up a gauge I don't know the > exact pressure (thanks Ford). > > Any other suggestions? > > -- > --- > Matt Macchiarolo > mlmacchiarolo at comcast dot net > AIM screen name RTI1182 > > "We must not confuse dissent with disloyalty." -Edward R. Murrow > Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Hi Matt,
I would turn up the stereo, and say you have normal expansion and contraction or exhaust pipes and the their heat shields. Forget it. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Matt Macchiarolo wrote: > > Posted this over on alt.ford.trucks yesterday, thought I would pick the > brains of this group as well. WARNING TO CHARTER POLICE! This is about a > Ford pickup. Move on to the next thread if you are offended. :-) > > 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded > with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in > North Michigan to my home in Southeast Michigan, about a 3 hour drive. When > I stopped for lunch at about the halfway point, I could hear a fast > 'tck-tck-tck-tck" that varied with engine speed. By the time I got out and > opened the hood, the noise was gone. OK, thought it might be a sticky > injector, didn't seem to harm the engine, and it did go away. Never heard it > before or after at street or highway speeds. No dash lights came on at any > time. > > I mention the trailer because I was driving almost the whole way with the > overdrive disabled, so the engine was running about 2700 rpm at highway > speeds. And it was warm today, ambient temp was about 85 degrees F. > > So when I get home, after getting off the e-way, I have about 3 miles to go, > up a couple of hills. When I got to the house, I heard it again, and this > time I got right out and opened the hood. Not coming from the top of the > engine, so I got underneath. It sounded like it was coming from the right > side of bottom of the engine. It could have been coming from the > transmission, but it was difficult to tell...I was using a long wooden dowel > against my ear, checking different locations, to isolate the noise. But > after about 2 minutes of idling, it went away again! > > My first guess is a possible leaking exhaust manifold, as (a) I live in the > Rust Belt and my exhaust system is becoming more oxide than iron , (b) the > exhaust has always had a resonance rattle at about 2000 rpm since new (the > Y-pipe back had been replaced under warranty twice and it always came back) > and (c) I am hoping like hell it's not inside the engine. I didn;'t get a > chance to check the manifold before the noise stopped, but I did check the > Y-pipes > under the pan and that was inconclusive. My guess is after running at street > speeds for a few minutes (and towing the trailer), the exhaust was heating > up more than it did at highway speeds (with less airflow to help cool it), > and something in the exhaust was expanding enough to cause a leak. After it > idled a little, it cooled back down and stopped leaking. I drove around > without the trailer and it never came back. All fluid levels OK, oil > pressure is there but of course without hooking up a gauge I don't know the > exact pressure (thanks Ford). > > Any other suggestions? > > -- > --- > Matt Macchiarolo > mlmacchiarolo at comcast dot net > AIM screen name RTI1182 > > "We must not confuse dissent with disloyalty." -Edward R. Murrow > Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Expansion and contraction noises that exactly match RPM? I'm thinking that
this has something to do with the expansion of the exhaust system but this was no normal expansion/contraction sound. Might be a good excuse to get some SS headers and exhaust. :-) "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42E290E0.DC69D2A3@cox.net... > Hi Matt, > I would turn up the stereo, and say you have normal expansion and > contraction or exhaust pipes and the their heat shields. Forget it. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Matt Macchiarolo wrote: >> >> Posted this over on alt.ford.trucks yesterday, thought I would pick the >> brains of this group as well. WARNING TO CHARTER POLICE! This is about a >> Ford pickup. Move on to the next thread if you are offended. :-) >> >> 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded >> with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in >> North Michigan to my home in Southeast Michigan, about a 3 hour drive. >> When >> I stopped for lunch at about the halfway point, I could hear a fast >> 'tck-tck-tck-tck" that varied with engine speed. By the time I got out >> and >> opened the hood, the noise was gone. OK, thought it might be a sticky >> injector, didn't seem to harm the engine, and it did go away. Never heard >> it >> before or after at street or highway speeds. No dash lights came on at >> any >> time. >> >> I mention the trailer because I was driving almost the whole way with the >> overdrive disabled, so the engine was running about 2700 rpm at highway >> speeds. And it was warm today, ambient temp was about 85 degrees F. >> >> So when I get home, after getting off the e-way, I have about 3 miles to >> go, >> up a couple of hills. When I got to the house, I heard it again, and this >> time I got right out and opened the hood. Not coming from the top of the >> engine, so I got underneath. It sounded like it was coming from the right >> side of bottom of the engine. It could have been coming from the >> transmission, but it was difficult to tell...I was using a long wooden >> dowel >> against my ear, checking different locations, to isolate the noise. But >> after about 2 minutes of idling, it went away again! >> >> My first guess is a possible leaking exhaust manifold, as (a) I live in >> the >> Rust Belt and my exhaust system is becoming more oxide than iron , (b) >> the >> exhaust has always had a resonance rattle at about 2000 rpm since new >> (the >> Y-pipe back had been replaced under warranty twice and it always came >> back) >> and (c) I am hoping like hell it's not inside the engine. I didn;'t get >> a >> chance to check the manifold before the noise stopped, but I did check >> the >> Y-pipes >> under the pan and that was inconclusive. My guess is after running at >> street >> speeds for a few minutes (and towing the trailer), the exhaust was >> heating >> up more than it did at highway speeds (with less airflow to help cool >> it), >> and something in the exhaust was expanding enough to cause a leak. After >> it >> idled a little, it cooled back down and stopped leaking. I drove around >> without the trailer and it never came back. All fluid levels OK, oil >> pressure is there but of course without hooking up a gauge I don't know >> the >> exact pressure (thanks Ford). >> >> Any other suggestions? >> >> -- >> --- >> Matt Macchiarolo >> mlmacchiarolo at comcast dot net >> AIM screen name RTI1182 >> >> "We must not confuse dissent with disloyalty." -Edward R. Murrow >> Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Expansion and contraction noises that exactly match RPM? I'm thinking that
this has something to do with the expansion of the exhaust system but this was no normal expansion/contraction sound. Might be a good excuse to get some SS headers and exhaust. :-) "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42E290E0.DC69D2A3@cox.net... > Hi Matt, > I would turn up the stereo, and say you have normal expansion and > contraction or exhaust pipes and the their heat shields. Forget it. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Matt Macchiarolo wrote: >> >> Posted this over on alt.ford.trucks yesterday, thought I would pick the >> brains of this group as well. WARNING TO CHARTER POLICE! This is about a >> Ford pickup. Move on to the next thread if you are offended. :-) >> >> 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded >> with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in >> North Michigan to my home in Southeast Michigan, about a 3 hour drive. >> When >> I stopped for lunch at about the halfway point, I could hear a fast >> 'tck-tck-tck-tck" that varied with engine speed. By the time I got out >> and >> opened the hood, the noise was gone. OK, thought it might be a sticky >> injector, didn't seem to harm the engine, and it did go away. Never heard >> it >> before or after at street or highway speeds. No dash lights came on at >> any >> time. >> >> I mention the trailer because I was driving almost the whole way with the >> overdrive disabled, so the engine was running about 2700 rpm at highway >> speeds. And it was warm today, ambient temp was about 85 degrees F. >> >> So when I get home, after getting off the e-way, I have about 3 miles to >> go, >> up a couple of hills. When I got to the house, I heard it again, and this >> time I got right out and opened the hood. Not coming from the top of the >> engine, so I got underneath. It sounded like it was coming from the right >> side of bottom of the engine. It could have been coming from the >> transmission, but it was difficult to tell...I was using a long wooden >> dowel >> against my ear, checking different locations, to isolate the noise. But >> after about 2 minutes of idling, it went away again! >> >> My first guess is a possible leaking exhaust manifold, as (a) I live in >> the >> Rust Belt and my exhaust system is becoming more oxide than iron , (b) >> the >> exhaust has always had a resonance rattle at about 2000 rpm since new >> (the >> Y-pipe back had been replaced under warranty twice and it always came >> back) >> and (c) I am hoping like hell it's not inside the engine. I didn;'t get >> a >> chance to check the manifold before the noise stopped, but I did check >> the >> Y-pipes >> under the pan and that was inconclusive. My guess is after running at >> street >> speeds for a few minutes (and towing the trailer), the exhaust was >> heating >> up more than it did at highway speeds (with less airflow to help cool >> it), >> and something in the exhaust was expanding enough to cause a leak. After >> it >> idled a little, it cooled back down and stopped leaking. I drove around >> without the trailer and it never came back. All fluid levels OK, oil >> pressure is there but of course without hooking up a gauge I don't know >> the >> exact pressure (thanks Ford). >> >> Any other suggestions? >> >> -- >> --- >> Matt Macchiarolo >> mlmacchiarolo at comcast dot net >> AIM screen name RTI1182 >> >> "We must not confuse dissent with disloyalty." -Edward R. Murrow >> Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Expansion and contraction noises that exactly match RPM? I'm thinking that
this has something to do with the expansion of the exhaust system but this was no normal expansion/contraction sound. Might be a good excuse to get some SS headers and exhaust. :-) "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42E290E0.DC69D2A3@cox.net... > Hi Matt, > I would turn up the stereo, and say you have normal expansion and > contraction or exhaust pipes and the their heat shields. Forget it. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Matt Macchiarolo wrote: >> >> Posted this over on alt.ford.trucks yesterday, thought I would pick the >> brains of this group as well. WARNING TO CHARTER POLICE! This is about a >> Ford pickup. Move on to the next thread if you are offended. :-) >> >> 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded >> with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in >> North Michigan to my home in Southeast Michigan, about a 3 hour drive. >> When >> I stopped for lunch at about the halfway point, I could hear a fast >> 'tck-tck-tck-tck" that varied with engine speed. By the time I got out >> and >> opened the hood, the noise was gone. OK, thought it might be a sticky >> injector, didn't seem to harm the engine, and it did go away. Never heard >> it >> before or after at street or highway speeds. No dash lights came on at >> any >> time. >> >> I mention the trailer because I was driving almost the whole way with the >> overdrive disabled, so the engine was running about 2700 rpm at highway >> speeds. And it was warm today, ambient temp was about 85 degrees F. >> >> So when I get home, after getting off the e-way, I have about 3 miles to >> go, >> up a couple of hills. When I got to the house, I heard it again, and this >> time I got right out and opened the hood. Not coming from the top of the >> engine, so I got underneath. It sounded like it was coming from the right >> side of bottom of the engine. It could have been coming from the >> transmission, but it was difficult to tell...I was using a long wooden >> dowel >> against my ear, checking different locations, to isolate the noise. But >> after about 2 minutes of idling, it went away again! >> >> My first guess is a possible leaking exhaust manifold, as (a) I live in >> the >> Rust Belt and my exhaust system is becoming more oxide than iron , (b) >> the >> exhaust has always had a resonance rattle at about 2000 rpm since new >> (the >> Y-pipe back had been replaced under warranty twice and it always came >> back) >> and (c) I am hoping like hell it's not inside the engine. I didn;'t get >> a >> chance to check the manifold before the noise stopped, but I did check >> the >> Y-pipes >> under the pan and that was inconclusive. My guess is after running at >> street >> speeds for a few minutes (and towing the trailer), the exhaust was >> heating >> up more than it did at highway speeds (with less airflow to help cool >> it), >> and something in the exhaust was expanding enough to cause a leak. After >> it >> idled a little, it cooled back down and stopped leaking. I drove around >> without the trailer and it never came back. All fluid levels OK, oil >> pressure is there but of course without hooking up a gauge I don't know >> the >> exact pressure (thanks Ford). >> >> Any other suggestions? >> >> -- >> --- >> Matt Macchiarolo >> mlmacchiarolo at comcast dot net >> AIM screen name RTI1182 >> >> "We must not confuse dissent with disloyalty." -Edward R. Murrow >> Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Expansion and contraction noises that exactly match RPM? I'm thinking that
this has something to do with the expansion of the exhaust system but this was no normal expansion/contraction sound. Might be a good excuse to get some SS headers and exhaust. :-) "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message news:42E290E0.DC69D2A3@cox.net... > Hi Matt, > I would turn up the stereo, and say you have normal expansion and > contraction or exhaust pipes and the their heat shields. Forget it. > God Bless America, ßill O|||||||O > mailto:-------------------- http://www.----------.com/ > > Matt Macchiarolo wrote: >> >> Posted this over on alt.ford.trucks yesterday, thought I would pick the >> brains of this group as well. WARNING TO CHARTER POLICE! This is about a >> Ford pickup. Move on to the next thread if you are offended. :-) >> >> 02 Superduty Crew Cab v10, 62,000 miles. Today I towed my trailer loaded >> with a Kawasaki Mule and a John Deere lawn tractor today from my cabin in >> North Michigan to my home in Southeast Michigan, about a 3 hour drive. >> When >> I stopped for lunch at about the halfway point, I could hear a fast >> 'tck-tck-tck-tck" that varied with engine speed. By the time I got out >> and >> opened the hood, the noise was gone. OK, thought it might be a sticky >> injector, didn't seem to harm the engine, and it did go away. Never heard >> it >> before or after at street or highway speeds. No dash lights came on at >> any >> time. >> >> I mention the trailer because I was driving almost the whole way with the >> overdrive disabled, so the engine was running about 2700 rpm at highway >> speeds. And it was warm today, ambient temp was about 85 degrees F. >> >> So when I get home, after getting off the e-way, I have about 3 miles to >> go, >> up a couple of hills. When I got to the house, I heard it again, and this >> time I got right out and opened the hood. Not coming from the top of the >> engine, so I got underneath. It sounded like it was coming from the right >> side of bottom of the engine. It could have been coming from the >> transmission, but it was difficult to tell...I was using a long wooden >> dowel >> against my ear, checking different locations, to isolate the noise. But >> after about 2 minutes of idling, it went away again! >> >> My first guess is a possible leaking exhaust manifold, as (a) I live in >> the >> Rust Belt and my exhaust system is becoming more oxide than iron , (b) >> the >> exhaust has always had a resonance rattle at about 2000 rpm since new >> (the >> Y-pipe back had been replaced under warranty twice and it always came >> back) >> and (c) I am hoping like hell it's not inside the engine. I didn;'t get >> a >> chance to check the manifold before the noise stopped, but I did check >> the >> Y-pipes >> under the pan and that was inconclusive. My guess is after running at >> street >> speeds for a few minutes (and towing the trailer), the exhaust was >> heating >> up more than it did at highway speeds (with less airflow to help cool >> it), >> and something in the exhaust was expanding enough to cause a leak. After >> it >> idled a little, it cooled back down and stopped leaking. I drove around >> without the trailer and it never came back. All fluid levels OK, oil >> pressure is there but of course without hooking up a gauge I don't know >> the >> exact pressure (thanks Ford). >> >> Any other suggestions? >> >> -- >> --- >> Matt Macchiarolo >> mlmacchiarolo at comcast dot net >> AIM screen name RTI1182 >> >> "We must not confuse dissent with disloyalty." -Edward R. Murrow >> Democracy requires diversity in media: www.outfoxed.org |
Re: OT: Odd noise question Ford Superduty
Yes, I didn't remember that, do the dual pipes still have a heat
raiser, their butterfly valve usually giggled with the pulsating gases. Forget it. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ Matt Macchiarolo wrote: > > Expansion and contraction noises that exactly match RPM? I'm thinking that > this has something to do with the expansion of the exhaust system but this > was no normal expansion/contraction sound. > > Might be a good excuse to get some SS headers and exhaust. :-) |
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