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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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Your engine will tell you when it needs a diesel engine compression. Learn the signs and what it means here.
Mar 13, 2004 · You will need a diesel compression gauge and adapter for your particular engine. The diesel tester goes to well over 300PSI.
How to do a Compression Test on a Tractor Engine. Warm up the engine. Stop the engine. Remove the fuel lines. Remove a fuel injector.
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