LLY was towed in here for a no start. Had codes P1226, P0302, and a 1094. Wont build rail while cranking but would fuel smoke some out the tailpipe. Pulled a couple glow plugs to find an injector hung open. Customer agreed to start with a set of injectors. Got them in today, fires right up...
Got the lower pan off and found the pickup tube is fine, unfortunately. There is some weird dried up sealant in the cavity where it presses into the upper pan. Maybe some of it got sucked into the pump. I'm unsure at this point.
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I have yet to have one apart but schematic looks like pump seals to upper pan vertically. Then the pickup tube inserts into the upper pan from behind, but horizontal. Without a seal. Looks like they are prone to cracking right at the bevel that it seats on when inserted the entire way.
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Im 2 morning starts in with no problem after the filter swap. So the pf63 must have had a faulty drain back valve.
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Has anyone had to fix a apparent oil prime issue? After sitting overnight, this 2021 will take around 15 seconds to build oil pressure. Which brings up the shut off engine warning on the DIC. It has new Rotella T4 15w40 and a PF63.
A google search brought up some threads on duramax forum...
LML surprises. When a customer calls explaining the symptoms that this causes(no flow over maf, so no fueling) it's a head scratcher trying to offer solutions when they are 3 hours away. At least the 1st time, probably won't forget this one. Luckily nothing made it to the turbo
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I guess GM thought m10 manifold hardware worked too well for 16 years...... How many have had to extract broken m8 studs out of L5Ps yet. This is our first luckily
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