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Old 03-04-2021, 12:02 AM   #9
CWPASADENA
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Join Date: May 2010
Location: PASADENA, CA
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Default Re: 30 Coupe Cooling question

I think you may have a bad head gasket or a crack in the head. Combustion can find its way into the coolant without coolant leaking into the cylinders. I would check for CO in the coolant. Very quick and easy to do and the CO checker is not expensive if you want to buy one. Most repair shops have one and you may be able to have one check the coolant for you.

If you have CO in the coolant, it has to be coming from the combustion chambers and it is time to pull the head and have a look.

That is my opinion,

Chris W.
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