Sponge Vette

Just wondering if this is a normal amount of smoke that comes out of the oil breather cap? Seems that when ever I get the vehicle in boost, I get a small amount of oil that spritzes all over the valve cover and I'm sure some on the belt. This seem to happen when letting off of the throttle, I do have a catch can. My system is a Paxton 2000 with a 8 rib setup 13 to 14 Lb of boost. I've attached a link to a recent dyno pull video, noticed the amount of smoke out of the breather cap, when coming off the throttle. Sorry for the poor quality video, used my cell phone.

Video

Rkreigh

probably getting quite a bit of blowby or backfire going on during the rapid deceleration on the dyno

does it do that on the street? that's quite a bit of smoke.

mine smokes a bit when warming up from the loose clearances on the forged pistons, but not that bad.

tail_lights

I don't think that is normal. Mine has just a bit occasionally but it is when in boost. That seems a bit much

Sponge Vette

Yea first time I've seen it from that angle, never able to notice it on the street, did notice a light oil smell in the car when coming off of boost. I'd be interested in hearing what would cause this and how to fix it from one of the forum vendors in this field.

396375

I'm not sure if this is related but my turbo motor was spraying out oil through the dip stick.I have a catch can.I found a K&N breather for the oil fill spout and that has helped a lot.Which BOV do you have?

Sponge Vette

Yes I do have a breather cap as my oil cap, This is part of the ECS Paxton kit, that's where the oil and smoke is coming from.

95wht6spd

I read they can mist oil when under high boost.

95vettski

Some oil and smoke out of that oil cap filter is normal, but yours seems a little excessive. Also, as mentioned what bov do you have? It doesn't sound like its releasing all the air fast enough...might need something bigger.

Sponge Vette

Yes I think your right. Not sure what I have, what ever came with the 2000 Kit, I'll have to look into upgrading that.

HP_Addict

Car should not be doing that.

How about some details on the engine? Also how much boost?

First thing that comes to mind is your rings are shot or nearly shot. Try doing a compression and/or leak down test.

Oh and start saving up for a new motor.

0Mike69@ECS

Thats not normal.

But are you certian that came out of the breather??? I cant be sure from the video, but I think that had to be out of the BOV. At least it looked like. Which, isnt normal either.

Call the shop in the morning and speak to me or Chris. We'll give you some ideas.

HP_Addict

How is it possible to get smoke/oil blowing out the BOV? Unless the seals in the supercharger are leaking.

Neil B

That's a lot of smoke out of the breather. Did it possibly puke some oil out of the dipstick tube and onto the headers?

tlove32

I know you don't want to hear this, but that same smoke on my stock block = blown ringlands on #7 piston

0Arun@CCP

I agree-just do a quick leakdown and compression test. On cars that are serious street/strip warriors I eliminate the PCV/catchcan setup and just vent both banks of the motor to atmoshphere.

Chris Stewart

Yikes. Like Mike said, the smoke doesn't appear to be from the breather cap. With oil spraying out, I can relate to that. Have you cleaned the filter? I soak mine in gas for a few minutes then blow it out. That keeps the oil under control for a while.

396375

You have a breather cap filter?That's not stock.

Chris Stewart

Yeah, also a catch can and a PCV check valve. Trying to keep this thing together another year!

a/c man

thats the way it is when you get over 10psi of boost it going to get past the rings in the crank case!! you need to get a lot more crank case vents like arun said! and on the dyno it worse!! when you blow out your rear main seal then its bad!a bigger bov will help let the boost pressure out some! you ned lots of crank case vents!!!!

Sponge Vette

Thanks for the advice guys, I've got an extra BOV coming so I'll be running 2 versus a single larger one. I'll also look into venting both banks. The motor is is pretty fresh and I'd be surprised if its a going past the rings. I'll look into doing a compression and leak down test for peace of mind. I'm confident in my mechanic ( Dr Phil ) he is one of the best and I'm sure this will get resolved.