Hey guys I am getting a bit desperate for answers and don't know where to turn. My car was getting an oil catch-can and retune at a local performance shop. After the tune I noticed a rather loud squeaking sound that would start off low but as the car warmed up to operating temp it would be louder. The tuner said it sounded like it was coming from the bell housing and said it was my pilot bearing. Well my car was getting worked on about a month ago and the auto shop looked into it. They said upon loosening the oil filter cap the car stopped squeaking. They went on to explain to me that they think a vacuum line might be clogged on the valve cover or my pcv might be shot. Which would also be another logical reason for the car to make this sound since the performance shop also installed an mpx oil catch-can that day in which they might of clogged one of the various fittings or hoses. Long story short what do you guys think it is? I will post a video if you guys want to hear the sound. Ps- I have not tried to loosen the filter cap like the shop has so I am just going by word of mouth for that one. Thanks guys!!

 

Here is what u do, if u have the lnf, take that oil catch can and throw it in the garbage cause it is useless. Catch cans have been tried by many people on the lnf and they catch nothing, they don't work. U need the Powell oil seperator, that is the only thing that has worked , and works very well indeed. As for right now, take that catch can off and put it back to how it was stock and I'm sure ur issue will go away, ur probably pressurizing the crank case with plugged something or other. It will harm ur engine.

 

x2

 

thank you tom I will try this and this fixes the issue I will look into the Powell oil separator.

 

I get that squeak sometimes and I have a Powell separator already. Its just as likely vacuum pulling past the cap could cause that sound as air escaping I would think. I took the cap off and put it back on and it went away. In for more info. Maybe Powell will check in, great part btw.

 

Powell seperator still what to get cause catch cans don't work. If it is the oil cap, change the oring

 

will do man thanks guys

 

Well my balt goes under surgery soon. Going to check the catchcan and the oil filter cap and see which one was causing the vacuum issue. Do you guys recommend removing the catchcan regardless?

 

Yes. this isn't an SRT4. Catch Cans are useless to the LNF.

 

wish modern performance.com wouldn't sell them for our cars then. I bypassed the catchcan and now the car sounds great! I left the check valve in incase my pcv were to blow apart though.

Thanks for all the help guys!!

Thanks for all the help guys!!

Thanks for all the help guys!!

 

Quick question would it be possible the check valve was in backwards? Because I bypassed the catchcan but left the check valve in. If you read the install directions of the check valve it says put the arrow away from the pcv so that's what I did. However the original install the arrow was the other way. Which would explain why there was no oil in the catch can and a clogged vacuum? Should I try reversing the check valve it to see if the sound comes back?

 

Doesn't matter, the LNF's PCV system is not designed to accommodate a typical oil catch can.

 

^ this, having it on backwards may have causes ur noise issue but it still won't make the catch can catch oil by putting it on right. I had a catch can on for 2 years, I even had steel wool between the 2 hose ports to trap the oil, guess how much oil it caught in that time, that's right , non. Intercooler pipes were still oily catch can basically just had the smell of oil to it and that about all. Powell oil seperator, have had it in for 2 months about, not one drop of oil in charge pipes or intake like there was with catch can. Don't try figuring it out , they just don't work. It's been tried by many people on the forum, and many different types of catch cans, even some home made ones. Non work. Only Powell seperator works on this car.

 

The only thing I know the answer is that Powell's Catch Can has drain back to Oil Dip Stick Tube. That is where the Oil pull from Catch Can. If You can get your oil dip stick tube to be modify then you can put catch can to get it drain pulled back to oil dip stick tube. That's how it work.

 

the catch can probably plugged the pcv vent and is now sucking air through the rear main, saw it on a cobalt when the pcv vent line to the intake was kinked and blocked off,

take the oil cap off while the car is running and see if it stops, if so, its the pcv

 

Well since this issue has been addressed I have noticed that my car was blowing blue smoke. Is it a possibility that this squeaking sound caused by pcv like described caused my turbo seals to go back? I just swapped my valve cover the other day but that wouldn't cause it right?

 

Or is it a possibility that the catchcan was honestly catching excess oil?