I think I figured it out but thought I should ask here.

I got a great deal on my 98 gt because the kid said the water pump was out..
upon inspection I noticed the water neck was leaking profusely" well the kid took the thermostat out because he heard he could get more HP"
well in doing so he stripped the bolts and tried to use a paper gasket and lock washers..

I replaced the neck, tstat and bolts ..rtv sealed and thread locked everything and she was still over heating slowly.

I took the radiator apart and cleaned it as well as replaced the hoses..

was told could be head gasket... I did a compression test and I'm getting 185-200 in all cylinders ...

I thought could be the heater core so I unplugged both line and sure enuf no pressure coming into the motor but plenty coming out" water pump is still good right?

tomorrow I'm going to bypass the heater core and see if that helps...

could it still be a head gasket even though I'm not loosing any pressure ?


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any coolant in your oil? vice versa?

 

nope none..its clean..I flushed the motor and the radiator and no sighn


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most likely the headgaskets are bad,same thing happened with mine.

 

so even if the head gaskets are bad I won't loose any compression?


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Its either 3 things: Your themostat is going, you have air bubbles in your cooling system or your headgasket is done.

 

that's what I don't get ...if my head gasket is done I should loose compression right? or at least have mixtures ...could it just be a clogged heater core


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bypassed the heater core and that fixed the problem...but now its smoking like crazy but I think its excess moisture burning off the heat shield


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just wait a couple of days and you should be fine