7.3 compression testing

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Jul 12, 2011 | 06:10 PM

dieselaholic

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Joined: Jan 2008

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From: Southern IL

7.3 compression testing

does anyone know what kind of #'s a compression test should be at for a 7.3L idi?
Thanks

Jul 13, 2011 | 12:52 AM

94 smokin stroker

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From: Salisbury NC

To perform a compression test on this engine, you need to have a diesel compression gauge and a glow plug adapter. Remove all the glow plugs to check any cylinder. Crank the engine at least five revolutions and the same number of revolutions for each cylinder. It would probably be a good idea to have a battery charger hooked up during the test. Ford lists no compression specs for these engine, only stating the lowest cylinder should be no more than 25% lower than the highest cylinder, with a low to high comparison chart showing a range of 195 to 440 PSI. In reality the compression should be at least 350 psi in all cylinders found this on google posted by dieselmann