Help Diagnosing Oil leak

[rdezs]

275,000 mi? LOL, it's had a good life.... And it's a good candidate to try those different cleaning chemicals. Just be prepared though.... It's quite possible carbon buildup is what's keeping the compression

 

[donjetman]

It's possible the rings are just gummed up. That solvent stuff you had to the oil makes me nervous though. I've seen some LS oil pumps suddenly lose pressure.... And found little tiny pieces of grit in the pressure relief valve. It would also make me nervous if any little pieces made their way to a lifter. The filter should catch it, but then again on a cold start with high oil pressure, some oil bypasses the filter through the oil filter pressure relief valve above the oil filter on some, and built into the oil filter on others. I can't remember what you said your mileage was. If it's around 200,000 miles, it's probably a little bit of everything. (Rings, valve guides and valve seals)

Its not solvent stuff, its Valvoline Premium Blue "RESTORE" engine oil, developed by Valvoline for Cummins for a piston ring sticking problem they have.
I did a lot of reseach.

 

[rdezs]

Sounds better than the one quart of engine flush I think they still sell.

 

[lspann3525]

Spent some more time under the truck today and noticed the passenger side rack and pinion boot is wet this could be what's causing the front cover to be oily

 

[donjetman]

Spent some more time under the truck today and noticed the passenger side rack and pinion boot is wet this could be what's causing the front cover to be oily

I feel your pain, mine;s doing it on the drivers side