How to do a Compression Test | Performing a Compression Test on a Porsche 944

In this video, I will go over how to test compression in each of your cylinders. I will also show you how to use a compression gauge. Low compression can be a result of bad valve springs, blown head gaskets, cracked block, or bent valves. In my case, I was checking to see if my head gasket was blown.
All video was taken by the Mile High Mechanic
All demonstrations provided by the Mile High Mechanic
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[@staceyzinck8159]

Too much coolant in the reservoir. The max line located on the top side halfway down the tank towards the headlight.

[@TheMileHighMechanic]

It was overflowing due to a head gasket leak, thus making compression leak into the cooling system making it overflow. Check my head gasket series to see that progression.