what went?
02-11-2005, 11:34 PM
#1
Guest
Posts: n/a
what went?
hi group!
folks! pls help me with this one -
so i'm starting up the jeep this evening first time in the day (meaning it's
dead cold)
some 3 secs after startup i hear this single ... 'ping' (or whatever the
word is)
a similar sound would be produced when a large nut (say 1/2-in screw size)
is dropped onto a metal surface
i thought to myself 'what the hell was that'
i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
always do after startup)
i noticed the oil pressure to be lower than normal (showing about 53#, as
opposed to normal 75#)
i revved the engine but ... the oil pressure needle wouldn't move a tiny
bit!
so i'm thinking the oil filter blew, or the pump, or something else, but
what?
and would the sound i heard suggest something dropped into the oil pan?
what?
i shut the engine and didn't touch it since
where am i looking to help figure these mysteries?
oil 10w30
filter fram ph16
ambient temp 32-F
91 wrangler, 4.0-L
any input appreciated
many thanks, pete
02-12-2005, 10:35 AM
#2
Guest
Posts: n/a
Re: what went?
Peter D. did pass the time by typing:
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
02-12-2005, 10:35 AM
#3
Guest
Posts: n/a
Re: what went?
Peter D. did pass the time by typing:
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
02-12-2005, 10:35 AM
#4
Guest
Posts: n/a
Re: what went?
Peter D. did pass the time by typing:
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> hi group!
>
> folks! pls help me with this one -
> so i'm starting up the jeep this evening first time in the day (meaning it's
> dead cold)
> some 3 secs after startup i hear this single ... 'ping' (or whatever the
> word is)
> a similar sound would be produced when a large nut (say 1/2-in screw size)
> is dropped onto a metal surface
> i thought to myself 'what the hell was that'
> i glanced over all the gages: eng temp, volts, fuel level & oil press (as i
> always do after startup)
> i noticed the oil pressure to be lower than normal (showing about 53#, as
> opposed to normal 75#)
> i revved the engine but ... the oil pressure needle wouldn't move a tiny
> bit!
> so i'm thinking the oil filter blew, or the pump, or something else, but
> what?
32 isn't cold for an engine unless the antifreze is not at the proper mix.
I've started the ZJ in weather down to -20.
If the filter blew you would be pumping oil all over the place
but that is not likely, filter bodies can take a lot of pressure.
That doesn't mean it couldn't fail internally and bypass. Might
be a good idea to change the oil and put a new filter on.
If the pump went you wouldn't have any oil pressure at all and
would hear a not so nice grinding noise as the gears self
destructed. Providing they just didn't seize up and twist
the end off your distributor shaft.
The sender might have failed internally, but usually when that happens
the oil pressure gauge either goes to zero or pegs.
> and would the sound i heard suggest something dropped into the oil pan?
> what?
Things dropped in the oil pan go sploosh becuase it's full of oil. :)
You heard something break or possibly an expansion noise. Lots of
engine parts will pop and groan as things cool off or heat up. Especially
the exhaust header.
> i shut the engine and didn't touch it since
> where am i looking to help figure these mysteries?
I'd start by looking under the hood and the jeep. :)
Check around the filter and pressure sender, remove and
clean the senders connector. Look for critters or things that
might have gotten in there.
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
02-12-2005, 11:48 AM
#5
Guest
Posts: n/a
Re: what went?
On Sat, 12 Feb 2005, DougW wrote:
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
02-12-2005, 11:48 AM
#6
Guest
Posts: n/a
Re: what went?
On Sat, 12 Feb 2005, DougW wrote:
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
02-12-2005, 11:48 AM
#7
Guest
Posts: n/a
Re: what went?
On Sat, 12 Feb 2005, DougW wrote:
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
> If the pump went you wouldn't have any oil pressure at all and
> would hear a not so nice grinding noise as the gears self
> destructed. Providing they just didn't seize up and twist
> the end off your distributor shaft.
Wouldn't the plastic drive gear on the timing chain give up before the
distributor shaft broke?
02-12-2005, 11:51 AM
#8
Guest
Posts: n/a
Re: what went?
Lee Ayrton wrote:
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
02-12-2005, 11:51 AM
#9
Guest
Posts: n/a
Re: what went?
Lee Ayrton wrote:
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
02-12-2005, 11:51 AM
#10
Guest
Posts: n/a
Re: what went?
Lee Ayrton wrote:
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> On Sat, 12 Feb 2005, DougW wrote:
>
> > If the pump went you wouldn't have any oil pressure at all and
> > would hear a not so nice grinding noise as the gears self
> > destructed. Providing they just didn't seize up and twist
> > the end off your distributor shaft.
>
> Wouldn't the plastic drive gear on the timing chain give up before the
> distributor shaft broke?
Likely, but he still has oil pressure so that is moot.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's