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fluid full, still overheating
10-03-2009, 04:11 PM
Post: #1
fluid full, still overheating
Year: 1997
Model: Grand Voyager
Engine Size: 3.3
Auto/Manual: auto
Mileage: 220000kms

Year: 1997
Model: Grand Voyager
Engine Size: 3.3
Auto/Manual: auto
Mileage: 220000kms

My 1997 plymouth voyager is overheating. It had a hole in the upper rad hose and lost some coolant. I changed the hose, filled up the coolant and now it's overheating again and smoking.What can I do to fix this problem? What else could be wrong?
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10-03-2009, 10:31 PM (This post was last modified: 10-03-2009 10:45 PM by Rupe.)
Post: #2
RE: fluid full, still overheating
Could be just a stuck t-stat, which may have been the cause of the first overheating situation. (excess pressure blew out an old hose)

Could also be that you have an air pocket in the system.

Last but not least is possibly something more dramatic and that depends on where the smoke is coming from. If it's belching out the tail pipe you may have a head gasket problem or a cracked head. Anywhere else might be excess coolant steaming away from some hidden area of the engine compartment.

Of course all of the above presumes the electric fan are working, the coolant is still full (after a few minutes of run time) and the air flow through the radiator is not restricted.
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10-06-2009, 12:36 AM
Post: #3
RE: fluid full, still overheating
Everything seems to be working fine, no bubbling of fluid,no smoking, and I changed the thermostat, but now the temp guage jumps when I'm parked and idling, but is fine when I'm driving. Is there anything else I can check?
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10-06-2009, 11:08 AM
Post: #4
RE: fluid full, still overheating
Yes, the electric fans.

Basically the movement of the car will keep the gauge in the normal range due to air flowing by and that's going to be around 195 degrees. OTOH, although the fans don't come on till around 230 degrees so I'd expect some changes in the dash gauge at idle. (AC and defroster off) Just listen or watch for the fans to cycle and observe the gauge reading. If the fans don't come on there more work to do.
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10-06-2009, 10:23 PM
Post: #5
RE: fluid full, still overheating
Kind of sounds like that pocket of air that Rupe mentioned in his first post. At idle the air pocket around the temperature sender makes the gauge jump. At speed, enough flow keeps the water on the sender holding the gauge steady.

One other thing that sometimes happens is, while driving; most of us have to look up at the road from time to time and that is when the gauge will jump. Have a passenger watch the gauge to eleminate the possibility that it is happening all of the time. (Unless you have already done that?)

Please let us know what you find.
Thanks, Garner

Thanks for using the forum,
Garner

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