Question about 1995 Pontiac Grand Am

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LEAKING ANTIFREEZE CHECK ENGINE LIGHT ON AND

LEAKING ANTIFREEZE REPLACED CAP STILL LEAKS
CHECK ENGINE LIGHT GOES ON AND WHEN IT COOLS SHUTS OFF

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  • Pontiac Master
  • 1,149 Answers

Hi:
If your coolant leak is minor, it would be a good idea to identify the general area that the drip is coming from,,either radiator area , or engine area. A bottle of Barrs leak will do wonders for a small radiator leak, but if your water pump or hose is leaking, they need replaced.
That will help you figure out where to go with that.
You need to scan your car to figure out what is tripping the light. Auto Parts stores dwill do this for free, Once you have a code, you can take your trouble shooting in the direction the code leads you.

Posted on Nov 17, 2009

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Posted on Jan 02, 2017

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1 Answer

How do I check for a blown head gasket on my 1990


Pretty much same answer as I gave for 87 Reliant see below. Shops have equipment to do cylinder leakage test. Do basic stuff below before doing last test ...cylinder leakage...which costs $$$.

Main point you are losing antifreeze/water. Check to see if you have water on the dipstick mixed in with oil. If so...probably a head gasket. If oil looks normal..... Before you do any test, tighten every hose connection. Check for loose connection into antifreeze reservoir. Sometimes there are small cracks on top which lets out pressure from cooling system. Look for leaks on water pump and radiator. Look at spot where you park the car...any liquid on floor? Not sure?..Put piece of cardboard under car to see if liquid is dripping from car. No leaks?...Start with a pressure test of the system. The pressure test is simply equipment that replace the radiator cap, a hand pump connected to it then air is pumped into cooling system. You watch the gauge to see if pressure is dropping. If pressure does not drop ..problem is most like a worn radiator pressure cap or stuck thermostat.. Do not buy the kind with button on cap to push down and release pressure. get original type and correct pressure. If overheating still, thermostat could be stuck, replace. Overheating of engine causes vapor lock, bubbles in fuel, which causes car to stall and kill. When cools off, fuel cools down and fuel will flow through fuel system again. Large amount of oil disappearing with overheating also sounds like head gasket or cracked head....Tighten up all bolts to gaskets, look for oil leaks on garage floor or driveway. If engine has developed a miss when running, pull plugs out and look for wet fouled plug. If antifreeze leaking into cylinder...plug tip will be whitish, if oil leaking into cylinder, grimey oil fouled. Do compression test on cylinder that is fouled and that will pinpoint if bad head gasket or cracked head. When doing compression test, radiator cap is removed and you listen to hear bubbles in radiator from the cylinder leaking into cooling system. 87 Reliant not worth pulling engine apart if head gasket or cracked head. Best oil treatment to reduce oil consumption is "Engine Restore" Used on my 58 Impala 348 tri power for 28 years. If I did not add it after oil changes it used oil and smoked....I swear by it for ANY engine after 100,000 miles.

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Why is my 1999 grand am still overheating the temperature guage goes to 260 degrees far to fast i already replaced the water pump and the upper raditor hose. my car still leaks antifreeze and i have to...


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Antifreeze is leaking on the passenger side of the car behind the engine where could the leak be coing from


For this types of problem,check the help link provided below.Click the link below to go through its troubleshooting procedure:-----Antifreeze leaking from front of engine near Air intake? http://technoanswers.blogspot.in/2012/02/antifreeze-leaking-from-front-of-engine.html
----------Antifreeze leaking from freeze plug on throttle body? http://technoanswers.blogspot.in/2012/02/antifreeze-leaking-from-freeze-plug-on.html
---------How to locate the vacuum leak? http://howtobyme.blogspot.in/2012/01/how-to-locate-vacuum-leak.html
-----------How to Perform Car AC Leak detection Test? http://repairhelpcenter.blogspot.com/2011/11/how-to-perform-car-ac-leak-detection.html
------------Common Causes of Car Oil Leaks? http://schematicsdiagram.blogspot.com/2011/12/common-causes-of-car-oil-leaks.html----------- Troubleshoot Car Oil leak? http://schematicsdiagram.blogspot.com/2011/12/troubleshoot-car-oil-leak.html
-----------The plastic housing which goes to the upper radiator hose is cracked and leaking?

http://schematicsdiagram.blogspot.com/2011/12/plastic-housing-which-goes-to-upper.html

---------------------------
Radiator leaking? http://repairhelpcenter.blogspot.com/2011/12/radiator-leaking.html
-----------This will help.Thanks.

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