I have been battling blow by issues for months now and can not figure out where it is coming from...I have put dye in the oil and even gone under the car while someone revved the **** out of it and nothing...I am on my second catch can setup and this time its dual cans but it still seems to be leaking from somewhere...I meet up with someone for the forums the other day to buy something and during our conversation i told him about the issue....The first thing out of his mouth was "spark plugs"...He had the same issue and went back to stock plugs and it stopped...His tuner told him stock turbo=stock plugs...It kinda made sense the more i thought about it because i didn't have the issue until i did my first oil change and spark plug change...I used the NGK BPR7's i believe...Not 100% but i'm pretty sure

Mod list:
Pretty much full bolt-ons
272 cams
injectors and fuel pump
evo 9 turbo 25-29psi
Soon to be on meth

 

I just checked my Spark plugs and I have oil from the top threads down... its not very thick but it was harder to clean of near the bottom.

Oddly the Tips looked to have good burn pattern... Not sure if its Blow By or HeadGasket?!?

 

"blow by issues" "dye in the oil" "under the car" "leaking from somewhere"


Do you know what "blow by" is?

 

Well here...lemme break it down to you what i mean by "blow by"....Oil being blow out from somewhere under boost...whether it be from a gasket, fitting, oil line, oil cap, ect...That's what i consider it...I'm sure you have a different opinion...I have tried the dye...No luck

 

I don't think I have any "opinion" on the definition. It's already been defined and that's that. Now if you have an "oil leak" that's a different story. If said "blow by" is indeed causing your oil leak it will be around the dip stick or trough the valve cover vents.

Blow-by
The Mixture of fuel-air which is lost past the piston rings and causes fumes that form acid and Sludge in the crankcase and smoking from the oil filer hole. Generally there is a loss of engine power. Most are removed through the PCV system.

 

And spark plugs don't cause "blow by" unless they punch a hole in a piston.

 

Thanks for clearing that up for me

 

Still running a PCV valve?

 

Sorry, I failed to mention you can get "blow by" like symptoms on a turbo charged car from a PCV valve that's not sealing correctly.

 

Yes with dual catch cans...I had a single Buschur catch can that drained back into the pan but once it started getting cold here in Connecticut i started getting moisture in my oil...I have to say it did help tho...I may swap the PCV catch can out and put the Buschur one back on because it has a breather filter but instead of draining it back to the pan i will drain in to the ground...Or i could always just run a pipe straight from the PCV to the ground

 

Have you cleaned or replaced the PCV valve and made sure all of your lines are clear? Sounds like that could definitely be the issue.

 

Yup i replaced the PCV valve with the aluminum nipple that was provided with the Buschur kit and all new lines going to my catch can and back to the intake manifold with 2 check valves...But like i said when i had the Buschur can on there with the breather on top it worked quite well but i got moisture in my oil...I will probably go back to that but not drain it back into the pan...I think its my best bet

 

check the turbo return line going into the pan, i had major blow by come to find out it blew out the gasket on the oil pan and had a slight leak on decell but poored on acceleration