Raghorn61

I have been seeing smoke on decel, and i pulled my upper intake off and found a puddle of oil in the #4 and #3 intake runner more so in the number 4 wondering were i should look first or if anyone else has seen this problem.

BMcEL

There were some responses in your other two identical threads.

https://www.yotatech.com/forums/f116...ration-235051/

https://www.yotatech.com/forums/f116...ration-242377/

Raghorn61

I complety blocked off my PCV system from my intake after cleaning my intake and it still is smoking on decel so oil must still be getting in it

snobdds

Well of course it is...through the rings and or maybe the valve seats. It's called blow-by and it is an indication of worn piston rings.

Do a compression check and leak down test...Then you know for sure.

TrikeKid

Hook your PCV back up and make it function correctly would be a start to fixing your truck. What steps did you go through to break this engine in? Sounds like the rings haven't seated to me.

Raghorn61

got 145 psi on all cylinders on a leak down and 5 to 7 % loss on leak down test on each cylinder, i just blocked the PCV off to rule it out because a majority of the oil was under the pcv valve inlet into the upper intake, ther was lots of oil residue in the the tube.