I am having a high RPM ping issue with my car since forever and have tried various fixes for it. I think it’s mostly due to oil getting sucked into my engine via PCV.

So I just did the PCV delete this weekend, capped everything off and installed the Metco breather on oil filler. I drove it for about 200 miles now and it seems to run a little hotter and the breather smokes like a chimney. Once the engine gets up to temp it constantly smokes (breather that is). If I rev it with the hood open I can see it puff even more.

Any ideas on what is causing this? I just seafoamed the car about 500 Miles ago, but it has fresh Mobil1.

Engine has 107K miles on it.

 

you just should have goten a catch can and, if you had time, clean the inside of the intake real good. I would think having a vacuum is better than just venting it out? Also try using seafoam on it, that will help clean up the combustion chamber and get rid of carbon deposits possibly causing the high RPM pinging.

 

Last time I had that much breather smoke I had cracked a ring land on #5 piston. The car actually ran decent just putting around. It got worse and was leaving oil on the intake near the breather and blew the dip stick out . Granted that was a old school 327, but the concept is still the same. It was also a high mileage, daily driven car that was abused pretty much daily. I hate jumping to later diagnois steps without trying all the small stuff but something here is telling me that you need to do a compression test, at least for a warm and fuzzy if anything. it may reveil one (or more) cylinders having 10% or more variation from the other 7.

 

I tried a catch can in the past and it sucked so much oil in the first place it was never effective. Maybe this is the whole problem in the first place; if the rings are worn I guess it might always suck too much in.

 

I was doing some searches and this seems to be the consensus that rings are worn. I'll do a compression test the as soon as I can and go from there. Thanks for the input.

 

I'm sorry to be the potential bearer of bad news. i seriously felt the weight of that outcome and its not my car! My piston had a crack between the 1st and 2nd ring on the outside of that ring land. I did the comp test and found the bad cylinder early on but i pulled the heads and found nothing so I put it back together and had same crap. This time i tore the engine down all the way and held the piston in my hand and still saw nothing wrong. then my dad came by and with his tool and die maker attention to detail took it and shook the piston and a nickel sized chunk fell out from the ring land. the crack was so fine I would have put it back in if it wasnt for him.
Well, if its a bad piston/ring combo then its a nice time for a forged bottom end!! Good luck and keep us updated.

 

Thanks for the input, turns out 3 and 5 are about 50 psi while the rest of the cylinders are 120 ish.

So I just ordered a crate ls6 engine from GMPP should fix everything.