- OFFICIAL GEARHEAD -
Join Date: Feb 2005
Location: Roswell, GA
My Ride: SC/GLHS(2)/CSX
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Re: Cooling Problem need help!
This sounds more like you need to bleed the cooling system problem. On top of the waterbox, there is a hex/Allen wrench plug, it is above and just behind the thermostat. If there is air in the system it will cause the temp gauge to be irratic and the heater will not work very well. If the plug has never been removed, it will take a torch to get that area hot enough to remove it. otherwise, many of us drill a 1/16 or 1/8" hole in the top of the thermostat and install it with the hole at the top allowing coolant to ease by during the fill process. You have to add the coolant then wait a minute or two as the coolant trickles through the small hole to fill the head w/coolant and to displace the air trapped in the water box and other areas of the head. Another trick is to park the car on a very steep hill or jack the front of the car up as far as possible then do your fill. That technique helps a lot but may still leave some air trapped...just not as much, another technique to use, and Ive done it several times is to actually pour in about a gallon of antifreeze first, then pour in boiling hot water. The hot water will cause the themostat to open and you can then get the head to fill with the mixture.
If you have any oil in the water or water in the oil that is typically a sign of a blown head gasket. It can often be confirmed with a compression test, one cyl at least will be very low on compression and when the engine is running you might even see the bubbling in the radiator neck. Hearing bubbling in the recovery bottle is NOT a solid indication of a blown head gasket. White smoke out the tailpipe that smells somewhat like butterscotch is often a good indication that coolant is reaching the combustion chamber...i.e.: blown head gasket.
Let us know what you try and discover/results.