'88 trooper thermostat question


Old 10-10-05, 07:51 PM
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'88 trooper thermostat question

I have an '88 Isuzu Trooper with a 2.6Liter 4 cylinder engine and when the engine is cold and I drive it for about 4 or 5 minutes, the temperature gauge nearly points to the "H" position before it starts going down to normal pointing straight up at the very center between "C" and "H".

Is this a sign of a weak thermostat or is this just normal for a 4 cyinder engine?
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Old 10-11-05, 08:55 AM
the_tow_guy's Avatar
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Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,571
Sounds like the thermostat is sticking. Normally you should see the gauge rise until it gets to the normal range and then either stay there or posssibly move down slightly as the thermostat opens. I would change it out as soon as possible to see if that fixes the problem. Overheating your engine would be very bad.

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