Question about 1994 Chevrolet G20

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1994 chevy van G20 4.3L runs a little rough and will not heat up to normal range according to the temp guage. during normal around town driving, the gauge gets to 100 degrees and during highway driving will eventually get to about the 160 degree range I have changed the thermostat twice with the recommended 190 degree unit. what causes it to run cool?

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Firstly if the engine isn't running at it's peak it won't be producing as much heat as usual and secondly an engine rarely runs cooler than usual in average ambient temperatures so it is probable the temperature gauge isn't indicating accurately - this could be a faulty gauge, a faulty instrument voltage regulator, bad connection(s) or bad wiring or a tired sensor. It could possibly mean the sensor bulb isn't in complete intimate contact with the coolant due to a buildup of scale or even combustion gas bubbles from a failing head gasket.

Posted on Oct 04, 2017

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Petrol or diesel?

Posted on Oct 04, 2017

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SOURCE: Engine running temp

195 seems to be a good operating temp.

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SOURCE: water temp gauge stay on 160 degree

should be fine as long as the gage goes up and down and you get heat it should be fine make sure you consider the outside temp. as the engine starts it will heat up get really hot the the thermostate opens and the gage will fall and should but not always stay low it could just be the ip gage.

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SOURCE: 1970 Chevy 350 in C30 truck dies when warm

You need to find oput what you loose when the truck shuts off, all you need is Air, Fuel , and spark to run one of the three are droppuig out when it stalls and will not run. Chech the carb for gas it sounds like you have a weak fuel pump.

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plaztiksr4me
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SOURCE: 2001 S10 2.2 flexfuel engine coolant will not warm up

thermostat cannot be stuck open or it would be cold on the freeway not city driving. less driving means less rpms or less coolant flow your thermostat has to be sticking shut in city driving it gets hot enough to force it open then itll stick open for a while. either way get the thermostat changed. or first thing to check you sure the engine is getting hot or maybe the temp sensor is giving false readings to the computer and gauge??

Posted on Apr 09, 2010

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