TwinTurbo.NET: Nissan 300ZX forum - What bubbles are you referring to? I didn't see mention
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Subject What bubbles are you referring to? I didn't see mention
     
Posted by ZXoltan on February 11, 2023 at 10:38 AM
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In Reply To not good! posted by Cjw3 on February 11, 2023 at 08:32 AM
     
Message I think you are jumping the gun here!

First of all, did you do a pressure test on the cooling system? That is the very first thing you should do. YOu can rent/borrow the tester from Autozone. You need to see if the system is holding pressure.

If it is not, look for leaks (coolant loss may be very slight and leaks not otherwise apparent). You also need to listen carefully, in case it leaking somewhere not so obvious (such as internal to the engine).

If you arent holding pressure and can't see where the leak is, I would do a compression check on all cylinders. This should help determine if you have a head gasket leak, and can proceed from there.

Meanwhile, don't freak out and assume the worst. Take it one step at a time in a logical progression, starting with very basic and easy tests.

     
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