Question about 1999 Pontiac Grand Am GT
Coolant keeps disappearing engine overheating
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Posted on Jan 02, 2017
SOURCE: 1999 grand am
'99 Grand Am have a plastic water outlet located on the back of the engine. (Same side as the battery). It is installed using a thin O-ring. Antifreeze is corrosive and weakens the O-ring causing a leak. Because of the location the leak can be almost undetectable. Replace the O-ring, but becareful not to break the water outlet.
Posted on Sep 18, 2008
It is probably the problem. To make shure that need to change the gaskets, one of the symptoms use to be thet the temp rises when you are running at speed 50+ average, where is supposed that the car gets a lot of air due by the speed and nobody thinks that will be overheated.
Posted on Nov 19, 2008
check if the engine is over heat,it it over heating ,definitely the coolant will dry,so check is,hope that clear your mind and help you
Posted on Sep 07, 2009
CHANGE THERMOSTAT.MOST OF THE TIME THERMOSTAT WILL CAUSE OVERHEATING.CHECK YOUR COOLANT MAKE SURE ITS NOT LOW.HAVE COOLANT FANS CHECK TOO SEE IF THEY TURNING ON.GET A DIAGNOSTIC SCANNER HOOK UP TO CHECK FOR COOLANT TEMPERATURE SENSOR FAULT AND FAN RELAY AND FAN FAULT. MAKE SURE FAN FUSE IS GOOD.
Posted on Nov 12, 2009
It looks like this with a connector to it and is on the side of the engine block:
Look right under the radiator hose.
Posted on Dec 01, 2009
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