Followup-- 2000 JGC V-8 still overheating
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
At idle it would be obvious if the hose was collapsed. The OP all ready said
the hoses were OK.
Carl
"Earle Horton" <earle@vascongado.usa> wrote in message
news:45ac39af$0$7835$a82e2bb9@reader.athenanews.co m...
> You forgot collapsed or clogged hose.
>
> Earle
>
> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
> news:gvSdnSaFOLwWqTHYnZ2dnUVZ_tijnZ2d@comcast.com. ..
>> No flow is only caused by four things. Clogged radiator, clogged block,
> bad
>> t-stat, bad water pump. Tell us if the heat is working. If it works well,
>> it's the radiator.
>>
>> Carl
>>
>>
>> "Doug" <nono@nono.com> wrote in message
>> news:wJidnd5To_1CITbYnZ2dnUVZ_tWhnZ2d@comcast.com. ..
>> > James wrote:
>> > I let the engine run for 45 minutes. The gauge went to 205 and
> stayed
>> > there. At no time did I see a water flow, even after 45 minutes of
>> > running
>> > at idle. I put my finger in the water and it was **warm** but not
>> > at
>> > all
>> > hot. Just warm. It never got hot.
>> >
>> > Mike Roman responded:
>> > I let the engine run for 45 minutes. The gauge went to 205 and
> stayed
>> > there. At no time did I see a water flow, even after 45 minutes of
>> > running
>> > at idle. I put my finger in the water and it was **warm** but not
>> > at
>> > all
>> > hot. Just warm. It never got hot.
>> >
>> >
>> > I still think it would be good to verify the temp guage is really
> showing
>> > the correct temp. Where is the temp sensor that the guage could read
>>200
>> > and the coolant not burn a finger?
>> >
>> > But then, what do I know? I have not worked on my on vehicles for
> years...
>> >
>> > Regards,
>> > doug
>> >
>> >
>> > "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> > news:isqdnZN7p-txfDfYnZ2dnUVZ_vWtnZ2d@comcast.com...
>> >> James,
>> >>
>> >> My money is on a bad water pump, thermostat, or clogged radiator.
>> >> No
>> >> coolant flow in the radiator at idle when warm could only be one of
>> >> the
>> >> three. Pull the upper and lower rad hoses and flush it with a garden
>> >> hose, or just pull the radiator and have it cleaned and re-cored.
>> >> While
>> >> it's off replace the water pump, and thermostat (yes, do it again),
> flush
>> >> the entire system and watch your cooling troubles go away.
>> >>
>> >> Hope this helps,
>> >>
>> >> Carl
>> >>
>> >>
>> >> "James" <jnipperxxx@nospamfdn.com> wrote in message
>> >> news:X82dnXCaIdETmTTYnZ2dnUVZ_umlnZ2d@comcast.com. ..
>> >>>I posted this several weeks ago, and got a lot of thoughtful replies.
>> >>>No
>> >>> remedy yet, this is just an update.
>> >>>
>> >>> Last week, I drove home from vacation, a 500 mile trip. I noticed
>> >>> repeatedly that the temp at 65 mph would be in the 205-210 range,
> but
>> >>> five
>> >>> minutes after I go up to 75 mph, the temp would increase to around
> 225.
>> >>> I
>> >>> did this test over and over, and got the same results.
>> >>>
>> >>> Someone suggested that to check the (new) thermostat, to take the
>> >>> pressure
>> >>> cap off when the engine is cold, start the engine, and see if there
>> >>> is
>> >>> water
>> >>> flow (I assume there should be flow after the thermostat opens up).
> I
>> >>> did
>> >>> this test, while the outside temp is 72 degrees. From the first
>> >>> engine
>> >>> start, I saw no water flow. None.
>> >>>
>> >>> I let the engine run for 45 minutes. The gauge went to 205 and
>> >>> stayed
>> >>> there. At no time did I see a water flow, even after 45 minutes of
>> >>> running
>> >>> at idle. I put my finger in the water and it was **warm** but not
> at
>> >>> all
>> >>> hot. Just warm. It never got hot.
>> >>>
>> >>> Should I have seen water flow after the temp went to 205, and the
>> >>> engine
>> >>> ran for 45 mins ??
>> >>>
>> >>>
>> >>> Any further comments will be appreciated.
>> >>>
>> >>>
>> >>>
>> >>> --James--
>> >>>
>> >>>
>> >>>
>> >>>
>>
>>>> ------------------------------------------------------------------------
> ----
>> >>> -------------------------------
>> >>>
>> >>> This is a V-8, 120 K miles. It usually runs around 200-210
>> >>>> degrees. During last six months or so, it will go up the 235
>> >>>> degrees
>> >>>> when
>> >>>> traveling over 70 mph. It will also do this when going up a medium
>> >>>> incline, even at very slow speed.
>> >>>>
>> >>>> It stays 100% normal at slow speeds, and at idle, such as at a
> traffic
>> >>>> light.
>> >>>>
>> >>>> Fan clutch was replaced fairly recently, that DID relate to heating
>> >>>> some
>> >>>> at idle.
>> >>>>
>> >>>> I am thinking either I need radiator work or a new radiator OR
>> >>>> that
> I
>> >>>> may have a bad thermostat. I suppose I could also have a
>> >>>> defective
>> >>>> water pump at high speeds, but that wouldn't explain why it
>> >>>> overheats
>> >>>> on
>> >>>> medium inclines even at slow speeds.
>> >>>>
>> >>>> BTW, some folks may say 235 degrees is normal under some
>> >>>> circumstances. I
>> >>>> can assure you that this is NOT normal, as I have driven this car
>> >>>> for
>> >>>> six
>> >>>> years and I know how it performs.
>> >>>>
>> >>>> What is most likely culprit? Themostat/Water Pump/Radiator
>> >>>>
>> >>>> If it is radiator, is it worth it to have it re-rodded, or is it
>> >>>> best
>> >>>> just
>> >>>> to install a new radiator?
>> >>>>
>> >>>> As a non-mechanic, are these any tests I can do to narrow it down
> more?
>> >>>> (Water pump does not leak).
>> >>>>
>> >>>>
>> >>>> Thanks for any tips !!!
>> >>>>
>> >>>> --James--
>> >>>
>> >>>
>> >>
>> >>
>> >
>> >
>>
>>
>
>
the hoses were OK.
Carl
"Earle Horton" <earle@vascongado.usa> wrote in message
news:45ac39af$0$7835$a82e2bb9@reader.athenanews.co m...
> You forgot collapsed or clogged hose.
>
> Earle
>
> "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
> news:gvSdnSaFOLwWqTHYnZ2dnUVZ_tijnZ2d@comcast.com. ..
>> No flow is only caused by four things. Clogged radiator, clogged block,
> bad
>> t-stat, bad water pump. Tell us if the heat is working. If it works well,
>> it's the radiator.
>>
>> Carl
>>
>>
>> "Doug" <nono@nono.com> wrote in message
>> news:wJidnd5To_1CITbYnZ2dnUVZ_tWhnZ2d@comcast.com. ..
>> > James wrote:
>> > I let the engine run for 45 minutes. The gauge went to 205 and
> stayed
>> > there. At no time did I see a water flow, even after 45 minutes of
>> > running
>> > at idle. I put my finger in the water and it was **warm** but not
>> > at
>> > all
>> > hot. Just warm. It never got hot.
>> >
>> > Mike Roman responded:
>> > I let the engine run for 45 minutes. The gauge went to 205 and
> stayed
>> > there. At no time did I see a water flow, even after 45 minutes of
>> > running
>> > at idle. I put my finger in the water and it was **warm** but not
>> > at
>> > all
>> > hot. Just warm. It never got hot.
>> >
>> >
>> > I still think it would be good to verify the temp guage is really
> showing
>> > the correct temp. Where is the temp sensor that the guage could read
>>200
>> > and the coolant not burn a finger?
>> >
>> > But then, what do I know? I have not worked on my on vehicles for
> years...
>> >
>> > Regards,
>> > doug
>> >
>> >
>> > "Carl" <carlsaiyed@hotmailREMOVE.com> wrote in message
>> > news:isqdnZN7p-txfDfYnZ2dnUVZ_vWtnZ2d@comcast.com...
>> >> James,
>> >>
>> >> My money is on a bad water pump, thermostat, or clogged radiator.
>> >> No
>> >> coolant flow in the radiator at idle when warm could only be one of
>> >> the
>> >> three. Pull the upper and lower rad hoses and flush it with a garden
>> >> hose, or just pull the radiator and have it cleaned and re-cored.
>> >> While
>> >> it's off replace the water pump, and thermostat (yes, do it again),
> flush
>> >> the entire system and watch your cooling troubles go away.
>> >>
>> >> Hope this helps,
>> >>
>> >> Carl
>> >>
>> >>
>> >> "James" <jnipperxxx@nospamfdn.com> wrote in message
>> >> news:X82dnXCaIdETmTTYnZ2dnUVZ_umlnZ2d@comcast.com. ..
>> >>>I posted this several weeks ago, and got a lot of thoughtful replies.
>> >>>No
>> >>> remedy yet, this is just an update.
>> >>>
>> >>> Last week, I drove home from vacation, a 500 mile trip. I noticed
>> >>> repeatedly that the temp at 65 mph would be in the 205-210 range,
> but
>> >>> five
>> >>> minutes after I go up to 75 mph, the temp would increase to around
> 225.
>> >>> I
>> >>> did this test over and over, and got the same results.
>> >>>
>> >>> Someone suggested that to check the (new) thermostat, to take the
>> >>> pressure
>> >>> cap off when the engine is cold, start the engine, and see if there
>> >>> is
>> >>> water
>> >>> flow (I assume there should be flow after the thermostat opens up).
> I
>> >>> did
>> >>> this test, while the outside temp is 72 degrees. From the first
>> >>> engine
>> >>> start, I saw no water flow. None.
>> >>>
>> >>> I let the engine run for 45 minutes. The gauge went to 205 and
>> >>> stayed
>> >>> there. At no time did I see a water flow, even after 45 minutes of
>> >>> running
>> >>> at idle. I put my finger in the water and it was **warm** but not
> at
>> >>> all
>> >>> hot. Just warm. It never got hot.
>> >>>
>> >>> Should I have seen water flow after the temp went to 205, and the
>> >>> engine
>> >>> ran for 45 mins ??
>> >>>
>> >>>
>> >>> Any further comments will be appreciated.
>> >>>
>> >>>
>> >>>
>> >>> --James--
>> >>>
>> >>>
>> >>>
>> >>>
>>
>>>> ------------------------------------------------------------------------
> ----
>> >>> -------------------------------
>> >>>
>> >>> This is a V-8, 120 K miles. It usually runs around 200-210
>> >>>> degrees. During last six months or so, it will go up the 235
>> >>>> degrees
>> >>>> when
>> >>>> traveling over 70 mph. It will also do this when going up a medium
>> >>>> incline, even at very slow speed.
>> >>>>
>> >>>> It stays 100% normal at slow speeds, and at idle, such as at a
> traffic
>> >>>> light.
>> >>>>
>> >>>> Fan clutch was replaced fairly recently, that DID relate to heating
>> >>>> some
>> >>>> at idle.
>> >>>>
>> >>>> I am thinking either I need radiator work or a new radiator OR
>> >>>> that
> I
>> >>>> may have a bad thermostat. I suppose I could also have a
>> >>>> defective
>> >>>> water pump at high speeds, but that wouldn't explain why it
>> >>>> overheats
>> >>>> on
>> >>>> medium inclines even at slow speeds.
>> >>>>
>> >>>> BTW, some folks may say 235 degrees is normal under some
>> >>>> circumstances. I
>> >>>> can assure you that this is NOT normal, as I have driven this car
>> >>>> for
>> >>>> six
>> >>>> years and I know how it performs.
>> >>>>
>> >>>> What is most likely culprit? Themostat/Water Pump/Radiator
>> >>>>
>> >>>> If it is radiator, is it worth it to have it re-rodded, or is it
>> >>>> best
>> >>>> just
>> >>>> to install a new radiator?
>> >>>>
>> >>>> As a non-mechanic, are these any tests I can do to narrow it down
> more?
>> >>>> (Water pump does not leak).
>> >>>>
>> >>>>
>> >>>> Thanks for any tips !!!
>> >>>>
>> >>>> --James--
>> >>>
>> >>>
>> >>
>> >>
>> >
>> >
>>
>>
>
>
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
OK I'll bite...............
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
OK I'll bite...............
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
OK I'll bite...............
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
OK I'll bite...............
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
How can the Inside heat be deceiving?
Yes most coolant can go through the heater core even before the thermostat
opens up.
BUT if the water pump is not pumping then the heater core will not provide
good heat! 8^)
And of course there might be other reasons for coolant not to flow, but if
coolant does flow then we can assume that the water pump is pumping. ;-)
"Mike Romain" <romainm@sympatico.ca> wrote in message
snip
> Inside heat can be deceiving. Most engines have a thermostat bypass so
> hot coolant can get to the heater core before the thermostat opens.
snip
Guest
Posts: n/a
Re: Followup-- 2000 JGC V-8 still overheating
Your radiator is clogged. Try flushing the system, or simply pull the
radiator and have it tested and cleaned. At 120K, it probably needs to be
replaced.
Carl
"James" <jnipperxxx@nospamfdn.com> wrote in message
news:YLWdnZ_NQ4JS2zHYnZ2dnUVZ_uKknZ2d@comcast.com. ..
> Yes, I do have inside heat.
>
>
radiator and have it tested and cleaned. At 120K, it probably needs to be
replaced.
Carl
"James" <jnipperxxx@nospamfdn.com> wrote in message
news:YLWdnZ_NQ4JS2zHYnZ2dnUVZ_uKknZ2d@comcast.com. ..
> Yes, I do have inside heat.
>
>
