How to do a Compression and Leak Down test on your engine
Jim describes and demonstrates how to perform a compression and a leak down test on your engine. This is invaluable information to have to determine the overall health of your engine. The Leak Down tester has a 14mm spark plug adapter, however, you will need a "long thread" 14mmx1.25 adapter as the one in the kit is too short to reach the 258 or 4.0L spark plug hole threads. Here are the kits I used: OTC 5609 Cylinder Leakage Tester Kit https://amzn.to/3njoruC OTC 5605 Deluxe Compression Tester Kit with Carrying Case for Gasoline Engines https://amzn.to/3lcbBvk
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