blue smoke with 48k miles after DP

Well, never had blue smoke, or the smell of oil from my car until yesterday, when i threw on the catless DP, now there is noticable smoke, and smell when the car is shut down..

when i did the hard pipe, i noticed oil sitting in the bottom of the IC outlet and inside the stock charge pipe.

when i got the car, it had an AFE instake and the valve cover wasn't venting to the intake, reciring oil thru the system..

now the only thing i know of that would be venting oil into the system is the PCV, which is at the TB. but how would oil from there get BACK into the system?

i would doubt turbo seals would tank out on an OEM turbo at 48k..

anyone ever hear of such a thing? or had this problem? pisses me the hell off.

 

You spray any sort of lubricant on the o2 housings studs/nuts prior to install the downpipe?

Oil found in the IC/IC track is caused by not running an oil catch can with check valve. PCV releases excess oil vapors which back tracks into the TB area.

Check the turbo for shaft play and see if it spins freely.

 

turbo has almost NO shaft play and spins great..

i figured it wasn't blown seals, but that it was oil from a vent system that was being burned.. i haven't had my HKS spraying out any oil, so that seems like the oil wouldn't be coming from turbo, just drizzling down the pipe and sitting at the lowest point..

and no, didn't use any lubricant.

im guessing my cat was catching most some of it and thats why i didn't notice it before.

 

do you have a catch can and a check valve?

 

nope..

 

get them thats whats causing the oil in the intercooler and the smoke, the cat was probably burning most of it but now it has a straight shot out

 

without a catch can that is normal. I get it all the time. I also empty it out every time I change the oil. I hear the oil there is what the catch can is supposed to catch.

 

did you get to check your plugs for oil yet??

 

nope. if there is that much oil going thru the IM and into the head, i'm sure the plugs will show some. although, itll prob look just the same as fuel.

this is just the excuse i need to replace the rest of the charge pipes and the intercooler to make sure the oil is out of the system.

ill throw on the catch can soon and pick up a check valve if i can find one. hopefully it'll solve my problems.

i friggin hate blowin smoke.. had enough fun with that when i blew my turbo seals on my tiburon..

 

Bwoody sells the check valve.

 

thanks ill check it out..

i just can't believe how crappy these cars were designed.. no car, much less a turbo car should be designed to have that much blow by from the PCV system... especially with such low miles..

holy POOP.. 25$ for a check valve.. meh..

 

Welcome to the club Nate

 

Think these cars are bad? Try owning a DSM (Eclipse/Talon/Laser - Turbo).

Supply and demand. Try finding a check valve for that size hose (3/8") yet alone cheaper then that. I've yet to find one.

Bwoody and RFR are you only two choices really besides PTP. RFR sells there's for $38 shipped.

 

using the check valve for the brake booster off a nissan or honda works well.

 

i guess im just amazed at the amount of blowby i have on a nearly stock car with low miles..

ill go junkyard hoping and check out some check valves on honda/nissans.. just cant see myself spending like 30$ shipped for a POS check valve.. its worth about 5$ or less.

 

Where does the PCV system draw from on those cars? (where does the air come into the crankcase)

 

The PCV valve itself is located on the valve cover on the far left in the middle.

The vapors/oil get drawn back into the intake track (intake manifold). The inlet is by the throttlebody/tb spacer.

 

I love my Bwoody check valve. Catch can and check valve was one of the first mods I got done to the car when I got it.

 

No, no. That's the "back end" of the PCV system. The manifold vacuum sucks air from the crankcase through the PCV valve into the manifold. Where does the fresh air get drawn into the crankcase from? On the 8's the breather into the PCV is hooked to the CAI tube. If you get any sort of "burp" or pulse, especially with abrupt changes from vacuum to no or negative vacuum (or spill oil while filling through the oil filler tube) you can end up with a good amount of liquid oil very early in the air intake system. The PCV is on the manifold behind the TB and normally oil coming in through that wouldn't coat the TB or earlier. I guess ideally (especially with FI) we'd want a can and a check valve between the PCV valve and the manifold and then a second check valve or a second can on the breather side. I was just wondering how the 4's are setup.

 

Its a revolving cycle, atleast that's the way I look at it. Engine is sealed tight so only way to get in air its through the intake, in through the turbo's compressor housing, through the intercooler pipes, through the intercooler, and through the throttlebody back into the intake manifold, etc.

There's a hose that goes from our valve covers to the intake as well.

We will use my engine bay for example.


By the oil cap, right behind it you see the PCV valve. The hose would normally run between the first intake manifold runner then to the port on the intake manifold by the tb spacer/throttlebody. On my car its running PCV valve to BT Catch Can, to Bwoody Check Valve (black and white looking piece by the intake neck by the air box) and then to the intake manifold.

There's a breather on the far right of the valve cover where a hose would normally run to your intake.