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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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I work with these engines everyday. In order to do compression test or leak down you'll need to remove the valve covers, remove 1 glow plug, use an adaptor to thread into that hole with a diesel compression gauge. On the 7.3's most people would like to see at or near 400 psi cranking compression for a healthy status.
But - that's only part of the truth. While it is a very good, robust set up, injector failure, glow plug failure, weak high pressure oil pumps are very common. The real test is when you fire it, monitor if any cylinders are laboring when cold and how much blow by is occouring. Feel free to PM me with any questions.
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss
'07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold
'85 Guards Red Targa - Almost finished after 17 years
'95 Road King w/117ci - No time to ride, see above
'77 Sportster Pro-Street Drag Bike w/93ci - Sold
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