MGB Engine Motor Compression Test Step by Step Guide

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A step by step guide to checking the compression on an MGB. It also covers the difference between checking with the throttle open and closed. I tested the compression with the engine cold and made a note of the readings, at an average of 205psi that is what I would expect from this high compression engine. A figure of around 160psi would be good for an unmodified B Series, it's also important to check the difference between each of the cylinders as mis-matched readings often means there is a problem.
Any questions are always welcome
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