A diesel engine should have 275 to 500 psi of cylinder pressure. If you are working on a diesel engine, you need a compression tool capable of reading these higher pressures. Most testers for gasoline engines go to about 300 psi, whereas gauges for diesels go to 1,000.
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Mar 13, 2004 · You will need a diesel compression gauge and adapter for your particular engine. The diesel tester goes to well over 300PSI.
$83.30
Additional Adapter that can be used with the Diesel Engine Compression Tester Kit. Availability: In Stock - Ships in 2-3 business days.