Question about 1994 Pontiac Grand Am

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Car overheats after fixing head gasket problem. replaced thermostat still overheats. fans does not seem to work, already checked fuse. can't get the fan out

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  • Kyle May 11, 2010

    Did the car overheat before the head gasket was replace? Did you have the head checked for warping before replacing the head gasket? Did you "burp" the coolant after replacing the the gasket? I would check your coolant and oil both to see if either is contaminated (i.e. coolant in oil or oil in coolant).

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Posted on Jan 02, 2017

SOURCE: Rapid overheating. New thermostat didn't fix it. Head removed... gasket ok. No apparent cracks in head. Main fan/clutch seems to work ok. Any ideas ? Mike in NZ

I know that this is going to sound like of dumb but I would check and make sure your thermostat was installed the correct way. I had a similar issue once, after replacing the entire cooling system on a 750iL it still over heated, turned out I put in the thermostat the wrong way. Always check for little mistakes first:) Hope this helps and please don't forget to rate me.

Posted on May 21, 2009

  • 9 Answers

SOURCE: alfa 156 overheats despite new thermostat and new

rev the engine over 3 4000 rpm and look in the expansion botlles for clear aer bubles if yes head gasket is gone my one was and water missing inexplicable yes is going in the cilinders or oil sump chek dipstik for white foam or very steamy waterish exhaust in the bak of the car

Posted on Jul 09, 2009

pugwash814
  • 377 Answers

SOURCE: what does a engine coolant temp sensor do?

yes some coolant sensors do, others just monitor the coolant temp,, the fan switch should be mounted on the radiator, " a plug with 2 electrical terminals on it " and can be tested by bridging the contacts with a pin and the fan should run if not the switch is at fault..

Posted on Nov 07, 2009

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SOURCE: car overheats fan not coming on replaced

easy way to check the fan on a Festiva is to pull the one connector off that connects by the thermostat housing. If you pull it the fan should come on and stay on. Until you are able to fix it you could just let the fan run like this. If it does not then you most likely need a new fan.

Posted on Nov 24, 2009

  • 6982 Answers

SOURCE: 5.2 1994 Jeep Grand Cherokee overheats at idle

I don't remember ever seeing a Jeep that did not have an electric fan as a supplement to the mechanical one. The electric one should come on when the A/C is engaged. Jeep radiators are far smaller than they should be due to ground clearance issues. The only way to make them work is to enhance air flow through them by using electric fans. (or adding an extra row of cooling cores such as in the special tow package). When the vehicle is moving there is enough air flow created by that to eliminate the need for fans altogether, but you have to stop sometime!
Your a/c compressor adds to engine loading (why it pulls rpm down) When at idle with a/c on, the engine "thinks" it's going up-hill and produces more heat. The heat needs to be scrubbed from the system or it can and will overheat.
Make sure that the clutch fan is engaging. It spins free when cold but should lock up after it gets hot. Add an electric fan to the system...check with several scrapyards and see of any Jeeps like yours have one and take it.(some electric fans are on the drivers side and some are directly in front of the mechanical one) If equipped, there is wiring for it in the car. If necessary you can add one either inside or outside the radiator and operate it by way of a switch and relay or just a switch. (there are aftermarket ones that are "slim line) and are designed to fit between the radiator and the front grille) You could also add an external transmission cooler...in doing that, it will take some of the heat load off the radiator. Also make sure that the new radiator has the same number of core rows as the old one did....some shops mistakenly put ones with less cores in when replacing due to cost. In a system with a marginal design this can become critical. (most radiators come with one two three and even four rows)
Once the problem has been solved, don't forget to put the 195 t stat back in or the engine controls won't work properly.

Posted on May 18, 2010

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1 Answer

I drive q 97 continental and i have changed head gasket water pump thermostat but engine still doesnt seem to be pumpingfliud right what else could it be thats causing me to overheat


Would help if you could share more specific detail information as to what the original problem was that lead you to replace head gasket, thermostat and water pump.

Your overheating could be caused by other factors such as a bad relay which operates your fans mounted on your radiator. Or could be a simple fuse which provides power to these fans. Could be a clogged radiator or other things.

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leave the cap off while it is idling, look in radiator for any air bubbles, if there is you have a leaking head gasket

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make sure the fan is working, turn on the ac and see if the fan works,, if not, check the relay,, or the fuse,, next, check the thermostat,, they can become stuck and the water stops circulating causing the motor to heat up, try those 2 things ,, if the problem persists ,, message me back by replying to this feed, and I'll assist you more

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Hi i have changed the head gasket on my vw polo and now it is overheating on every journey the fan doesnt seem to come on any ideas what it could be as i have put new temperature sensors and thermostat and...


Hi Marie.

Test if there is voltage to fan motor with engine hot (use a test light or a Voltmeter). If there is 12VDC to fan motor and motor does not turn, then the fan must be replaced. An alternative way to test the fan would be energizing the motor by connecting it to 12VDC. If fan does not run when motor is energized, then the fan is defective.

If fan does not get power fuse, fan relay, thermostat and wiring must be tested. If you have already replaced thermostat, test the rest.

Check the fan fuse first. Most VW use a 30 Amp fuse located in the fuse plate. Refer to the car owners manual for fuse location. Depending on the year of your Polo there is a Coolant Fan Control Relay on the main relay panel. If the relay is good it must power the fan when the engine is hot. Before going for the relay check that two of the relay's contacts are getting power. If there is no power to the relay and fuse is good it means that there is a wiring problem.

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Ginko

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Car will overheat while at idle


yes the head gaskets leaking on modern aluminum head engines is all to common. never overheat them, if they start to get hot shut it down and find out why, it can of course be the fans and plugged radiators or faulty thermostats but sounds like in your case the head gasket is leaking and combustion gas is entering the cooling system and this causes an overheat

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I had a similar problem with 2003 nissan sentra, no heat , and car would stall on road on and off. Became a problem more frequently stalling. Took to nissan and they said it was head gasket. Fixed it and never had problem again. But i had it fixed at a local dealership since nissan was charging 1000.00 compared to 550.00. I replaced water pump and thermostat first b4 this and no cigar.

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Rapid overheating. New thermostat didn't fix it. Head removed... gasket ok. No apparent cracks in head. Main fan/clutch seems to work ok. Any ideas ? Mike in NZ


I know that this is going to sound like of dumb but I would check and make sure your thermostat was installed the correct way. I had a similar issue once, after replacing the entire cooling system on a 750iL it still over heated, turned out I put in the thermostat the wrong way. Always check for little mistakes first:) Hope this helps and please don't forget to rate me.

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