1993 Plymouth Acclaim Malfunction - Engine


Question: I have a 1993 Plymouth Accliam 2.5L. This car has run wonderfully until a few months ago it began to overheat. I had the car taken to my dealer and they told me the head gasket was leaking, a common problem with this model engine. they replaced the head gasket, allong with the PCV valve and hose, the radiator cap, cam seals, and cam plugs. The car runs well, but I noticed the temperature guage fluctuates while driving, it will move close to hot, then down close to cold. I asked my dealer about this and he said it was normal and gave me a service bulletin to read. It states: Some temperature guage reading fluctuation on vehicles equipped with 2.2L or 2.5L engines during cold weather is NORM. This fluctuation does not indicate a cooling system problem, engine problem, or a malfunction of the temperature guage. The temperature guage will rise until the thermostat opening temperature is met. When the thermostat opens, the guage will drop to the lower portion of the normal operating range. This occurs because the thermostat has allowed the cold coolant from the radiator to enter the engine. The cold coolant is sensed by the temperature sending unit resulting in a lower temperature guage reading. This cycling or fluctuation of the temerature gague indication will be observed until the entire cooling system becomes normalized (obtains the same relative temperature). The colder the ambient temperature, the longer this condition will be exhibited. In extremely cold ambient temeratures the fluctuation may continue indefinitely. When I noticed the guage fluctuating, it was 60F and sunny out, I was driving in light traffic. I just wonder if my car will be as dependible as it previously was during our summer months when its 110F, I have the A/C on and I'm in bumper to bumper traffic, something common here in Phoenix. My question is why does this happen? Previously, when the engine would reach normal operating temperature, the needle would move into the lower end of the guage and never move. I would think if the dealer replaced the parts with all the indentical ones, this shouldn't happen. Could it be the thermostats fault? I previously replaced it with one by Stant. Although its supposed to be the correct one for my engine, I noticed in the Haynes manual, the illustration on the factory thermostat has a smal air vent valve built onto the top of it, while the Stant one does not. Is there anything I can do to fix this, or should I just ride out the warrenty (12 months, 12, 000 miles) and see what happens? Thanks much! A frustrated Acclaim owner


 
Technican: Actually, the thermostat that I would be using is the one that has the small vent hole. My understanding is that the thermostat will allow some coolant flow to travel through the system. This will alleviate some of the pressure in the system and equalize pressures in the system as well (This will also help in relieving pressure on the head gasket). I have a '88 Sunbird that had the same problem. In cold weather, the temperature gauge would go from one extreme to the other. Since the last head gasket (common on these cars as well) I have drilled the relief hole on the thermostats myself. Since then I have not had any trouble. You may want to make sure the system has been properly purged of all air.

Here's How To Get Guaranteed Solutions In Minutes

More Acclaim Answers
1974 Valiant Upgrade
1989 Sundance Leaking
1990 Laser Leaking
1998 Neon Overheating
1993 Acclaim Malfunction
1992 Voyager Stalling
1990 Laser Other
1990 Laser Malfunction
1993 Grand Voyager Chugging
1992 Voyager Overheating
1990 Voyager Stalling
1991 Laser Stalling

Home

Plymouth Answers

Acura
BMW
Buick
Cadillac
Chev
Chrysler
Daihatsu
Dodge
Eagle
Fiat
Ford
GEO
GMC
Honda
Hyundai
Infiniti
Isuzu
Jeep
Lexus
Lincoln
Mazda
Mercedes Benz
Mercury
Mitsubishi
Nissan
Oldsmobile
Plymouth
Pontiac
Porsche
Renault
SAAB
Saturn
Subaru
Suzuki
Toyota
VW
Volvo

Home

template

eXTReMe Tracker