Thread: cummins blowby
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Old 04-15-2013, 05:40 PM
Mike Holmen Mike Holmen is offline
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Join Date: Apr 2013
Location: Calgary, Alberta
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Vehicle: 2010 dodge ram
Trim Level: Laramie
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Engine: 2007-2011 409ci (6.7L) Cummins Turbo Diesel 350hp 650lb/ft
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What engine oil are you using? I would do a compression test and a leak down test. That would tell you the condition of the engine. Typically the mains/rod bearings would see the most wear from the lack of oil. There are piston oil cooler nozzles that shoot oil at the bottom of the piston. What oil pressure pressure? Was there any bearing material in the filter and in the oil?

Lots of things cause low cylinder pressure, the cummins VP engine have cracking issues between the exhaust/intake valves. I've replaced my head on my 02 truck a few times.

Usually if you have any piston damage, you can hear it and the truck will be hard starting. I've built a bunch of these engine over the years and they are a very easy engine to build up.
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