Oil prime

[ikeG]

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 that a couple had cracked oil pickup tubes. I cant find any TSB regarding it. I suppose i should just start tearing the oil pan off.

 

[2004LB7]

What about the easy stuff like the filter anti drain back?

 

[ikeG]

I threw a pf26 on it and will check again in the morning

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[ikeG]

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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[PureHybrid]

Can you see any damage? My brother noticed a damaged valve on a Wix he bought last year for his 2022. Never had an issue with low pressure at startup though

 

[darkness]

The pf63 is the new replacement for the pf26 right? Hope there wasn’t a bad run of those.

 

[ikeG]

The pf63 is the new replacement for the pf26 right? Hope there wasn’t a bad run of those.

Yes that is correct. This 63 was out of a master pack that I've used 3 or so out of without a problem

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[shakenfake]

Hmmm, I haven't noticed any issues with the PF63 I installed a couple of weeks ago. This is on a 2011 Cadillac SRX.

 

[Chevy1925]

I’m still using the 26’s here. I think I tried a 63 on my truck currently. It’s due for an oil change and no pressure issue.

Hopefully just isolated to that one filter!

 

[darkness]

My fault, I must’ve read something wrong or it was a different post that someone had an issue with 2 filters in a row. I have a 63 on my truck now.

 

[ikeG]

Jumped the gun on this one, customer said it lost prime last night again.

 

[1FastBrick]

Jumped the gun on this one, customer said it lost prime last night again.

Does the truck identify as a Ford 6.7L...

 

[TheBac]

Did GM do the same stupid thing with the L5P oil pickup that they did with the first Cruze diesel? Used an O-ring seal between the pickup and the block/oil pump?

 

[ikeG]

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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[ikeG]

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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[1FastBrick]

I wonder if that is something like forum a gasket?

 

[ikeG]

Put a new oil pump and pickup tube on and it's been fine.

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[Lemonjelly327]

I’m having the same issue with my 2017. I’m trying to make sure I have everything set before I dive in. Not much information on oil pump replacement for the l5P. Is it the same as older motors? Entire front end tore down to front cover, both oil pans removed, full removal of front 4x4?

 

[ikeG]

The differential doesn't need removed completely. It can just be lowered. But you are correct about everything else.

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