Question about 2002 Pontiac Grand Am

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Sometimes my car will start to run hot and then it will run ok checked for water it was good cant see or find any leaks. Do you think the radiator might be clogged?

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Its not intake manifold. thats air. manifolds that were mentioned are for coolant transfer from one side of the block to the other. the gaskets didnt hold up to the pressure from the flow on a ton of these vee-hickles. youre going to need new head gaskets, as well as new gaskets for those coolant manifolds. if you decide to go this route, flush the entire system, replace the water pump, and change out your thermostat and thermostat housing, along with both sensors on the housing.

Posted on Apr 20, 2015

  • Luke MacDonald
    Luke MacDonald Apr 20, 2015

    its not intake manifold. thats air. manifolds that were mentioned are for coolant transfer from one side of the block to the other. the gaskets didnt hold up to the pressure from the flow on a ton of these vee-hickles. youre going to need new head gaskets, as well as new gaskets for those coolant manifolds. if you decide to go this route, flush the entire system, replace the water pump, and change out your thermostat and thermostat housing, along with both sensors on the housing.

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Check your intake manifold,these cars are notorious for
them going bad,look closely at the top of the engine for
puddles of water,if not I would flush the radiator.hope this
helps good luck .

Posted on Apr 19, 2015

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If your engine is overheating, Try this procedure:

  • Dirt and debris can get lodged in the radiator air flow paths. This can block the radiator and cause your engine to overheat and damage the engine

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on Apr 18, 2015

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I wouldn't think the radiator is clogged. If it were, it would run hot nearly all the time when warmed up. Could be air in the system, a sticking thermostat, or a water pump one the verge of going out on you. It wasn't specified if your car has a inline four, V6, or what size engine. How may miles on your car? Did you buy it new, how long have you owned it, had the water pump ever been changed while you're owned it?

I'd say from your limited description that a new water pump and thermostat are in order, after verifying the cooling fan does indeed come on. If the fan is inoperative it should be checked by connecting it directly to the battery. If OK then the fan relay may be bad (fairly common). If a computer swap is required (since the fan is controlled by the computer) if it were me I think I'd get one of those adjustable fan control switches (a sensor is included) and bypass the computer control. I think Hayden makes them. Never put or allow anyone to put tap water in a radiator. The minerals in tap water calcify and can gradually diminish the size of already very small passages in the radiator and eventually clog it up. Use only distilled water from the grocery store. This is what the factory puts in.

Posted on Apr 18, 2015

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How hot is the engine getting in degrees F? I realize some temp gages just say h/l or c/h. It does help to have the actual temp. Does your radiator fan work ok? On some makes and models, the fan/s won't turn on till about 220 degrees F.

You could check your thermostat--water pump--serpentine belt.

Posted on Apr 18, 2015

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Could be or the thermostat getting stuck check your cool in fan motor too and sensor it all works in conjunction any if the radiotor is bad you should replace the thermostat .good luck.hugos1915 @live.com.

Posted on Apr 18, 2015

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Posted on Jan 02, 2017

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SOURCE: temp gauage rises and no sign of car running hot

are the cooling fans working????????????they should work with the a/c on. they wont come on with the a/c off until the engine is approx 220f

Posted on Sep 17, 2009

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