Loud lifter knock, low oil pressure when warm.

[Foul_Mouth]

Id confirm with mechanical gauge. I have a vdo electric gauge and it reads off from time to time.

[ak-]

Originally Posted by cadillacdude1975

It can’t hurt…. It may confirm what you already think.

Originally Posted by Foul_Mouth

Id confirm with mechanical gauge. I have a vdo electric gauge and it reads off from time to time.

Okay will do.

In two days, I'm dropping it off at the machine shop as well. I explained to them the symptoms. The engine is warrantied, but I'm responsible to pull it (or pay for it to be pulled) since that's how I brought it in originally.


I'll update the new findings.

[ak-]

Update:

Truck is back in my possession and running great!

Machine shop:
The crank shims wore out to nearly nothing and it ruined my crank. It had to get replaced. He said he believes the transmission was pushing against it.
Also suspects oil pressure loss, but we both couldn't figure that one out.
Because the crank was so worn and screwed, oil pressure wasn't holding.

Did a 120mi trip and it ran flawless. My clutch pedal also feels better than I previously remember too. It's not so stiff and the engagement point isn't sooo low to the floor anymore. Maybe this ties somewhere somehow in his suspicion of the trans pushing against the crank? Thoughts?

[89'HBV6]

Originally Posted by ak-

Maybe this ties somewhere somehow in his suspicion of the trans pushing against the crank? Thoughts?

I wonder... when the 1st rebuild happened, did they not pull the crank and inspect? At least gauge it and see where the wear is...


But, I digress... glad you got it back and running.
Hope others have more ideas on the cause...

[ak-]

Originally Posted by 89'HBV6

I wonder... when the 1st rebuild happened, did they not pull the crank and inspect? At least gauge it and see where the wear is...


But, I digress... glad you got it back and running.
Hope others have more ideas on the cause...

I asked them on 3 separate occasions if there was any clearance issues on the crank/bearings, but he kept saying no. On the first rebuild, they mentioned sending the crank out to get worked on. That's all I can remember. I wish to find out too what could of led to this.

Thank you!