I have antifreeze leaking from the left rear side of the engine on my Grand Prix '03. It started overheating a week ago, it was low on antifreeze. I added almost a gallon and it ran fine. Today, it started overheating again and now have the fluid leak. Have been told it could be a timing chain cover gasket but want a second opinion please. Thanks!
Do you have heat in your car? my guess is its the heater core. but could possibly be anything from the headgaskets up. there is a drain hose which comes out of the firewall to drain fluid from the interior of the vehicle in case of heater core failure. just under where the ac enters the firewall. Make sure thats where its leaking from then start with the heater core which is a harder job than changing the headgaskets up.
Rule out leak from water pump. What engine is it - 3.0 3.8. Could be intake manifold gasket. Have the cooling system pressurized, about 12 lbs. and look for leak, bubbles.
check oil for coolant in oil also. Possible head gasket leak.
SOURCE: Where is the AC Low pressure valve on a 1999 Pontiac Grand Prix?
sometimes its behind the alternator real close to the firewall. Find the bigger of the two hoses and pipes the low side is always bigger. Also the cap is blue and the fitting for the charging can will only fit on the right valve.
Make sure your cooling fans are coming on when the temp heats up. Are you talking about a leak inside the car or outside? Inside is usaully a drain tube for the A/C stopped up. Outside, look for a water pump or intake gasket.
SOURCE: starts and runs 3-5 seconds and shuts down
Sounds like your security system is shutting the car down. You should be able to leave the key on for 15 minutes and it will reset itself. Make sure you are using factory keys, and they are in good condition.
SOURCE: how much to change a oil pan gasket for 2001 grand prix 3.8 gt
If you want to repair the oil pan I would also check lower engine mount for leaking oil and cracks in anti sway bar near fitting's. This due to engine mount is oil filled. OEM sway bar is made of tubular steel and they crack easy. Replacement sway bar is solid steel. Here's the kicker. When they pull the lower frame to service oil pan. The engine mount and sway bar are attached to that frame. A honest mechanic should only charge for parts ($35 for mount and $100 for sway bar) and maybe a extra hour. My mechanic did all in 5 hours. FYI gasket is only $35 bucks. Good luck
SOURCE: My 2002 pontiac grand prix
Hello, kevans222 and thank you for asking your question on Fixya!
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How to diagnose your overheating 2002 Pontiac Grand Prix
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Thanks for the vote, and good luck!
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