oil in the intake tube

[morepowerjoe]

Does anyone else get oil in their intake tube from the fresh air inlet form the passenger side valve cover to the intake tube on a cold air inductions CAI? If so how did you stop it?

I've tried to get it to stop by putting on this oil filter from earl's but it still gets in there somehow.

[gtstorey]

Catch Can

[morepowerjoe]

I have a mishimoto catch can

[RupertPupkin]

Originally Posted by morepowerjoe

I have a mishimoto catch can

Maybe dual setup.

[gtstorey]

Maybe something like the Mighty Mouse Wild setup that does a different routing
https://docs.google.com/document/d/1...JTcepoubI/edit

[morepowerjoe]

Originally Posted by RupertPupkin

Maybe dual setup.

Yeah that's what I was thinking about but hate to spend another $300 + dollars on a new set up. That's the only thing I can think of that would filter the clean side of the pcv system.

[morepowerjoe]

Originally Posted by gtstorey

Maybe something like the Mighty Mouse Wild setup that does a different routing
https://docs.google.com/document/d/1...JTcepoubI/edit

Those set ups still have the clean air system in place so it wouldn't do any better.

[1JEWLDSSRS]

I get that as well from my K&N system. Not all the time though. I know it is coming from that valve cover because if I disconnect the line from my CAI and just leave it laying along my valve cover/manifold it doesn't get in there, plus nothing comes out of the tube end to get on my valve covers. I don't know either. And I do have an RX catch can that does its job.

[The_bald_eagle_machine]

I had a mishimoto catch can, and a cold air inductions cold air intake. It was bone dry when I pulled the intake tube off. And I had it routed to my stock valve covers and then to my holley valve covers when I switched to those.

[morepowerjoe]

Originally Posted by The_bald_eagle_machine

I had a mishimoto catch can, and a cold air inductions cold air intake. It was bone dry when I pulled the intake tube off. And I had it routed to my stock valve covers and then to my holley valve covers when I switched to those.

But I have extra big piston ring gaps for my boost later on. 25/27

[The_bald_eagle_machine]

Originally Posted by morepowerjoe

But I have extra big piston ring gaps for my boost later on. 25/27

True. I didn't think of that. Then you might wanna get the Mightymouse "wild" catch can like I did. It uses the port on the intake, and the oil fill cap. He sells an adapter that fits the Holley valve covers as well. With that kit you block off the valley cover port with a vacuum cap. Or you may be able to get away with just venting the valve cover with a breather?

Also I just noticed that your catch can is not routed as intended. The mishimoto is supposed to have the inlet from the manifold and the outlet to the valley cover. It looks like yours in Tee'd into the valve cover port. Not sure if that makes a difference, I'm just pointing it out.

[morepowerjoe]

Yeah I've been talking to a guy at mighty mouse and I told him that I want to do it all (drag race, road race, and more) and he recommended thier mild can with the recirculating top. And then I told him my problem with the oil in the intake tube. So he said there's a modification that can be done to the can that will allow more to flow through the can to reduce the positive crank pressure but told me that the modification would have to be done by me giving no instructions on how to even do it. So that was the end of that conversation.

[morepowerjoe]

Originally Posted by The_bald_eagle_machine

True. I didn't think of that. Then you might wanna get the Mightymouse "wild" catch can like I did. It uses the port on the intake, and the oil fill cap. He sells an adapter that fits the Holley valve covers as well. With that kit you block off the valley cover port with a vacuum cap. Or you may be able to get away with just venting the valve cover with a breather?

Also I just noticed that your catch can is not routed as intended. The mishimoto is supposed to have the inlet from the manifold and the outlet to the valley cover. It looks like yours in Tee'd into the valve cover port. Not sure if that makes a difference, I'm just pointing it out.

I have mine routed that way because I have the l92 valley cover without the pcv / dod provision in it and thus no port on the cover. So since I have a vvt engine in stock form it had the pcv orfice in the drivers side valve cover. So I have mine set up pulling crank case gasses from the drivers side valve cover through the catch can and then into the intake manifold vacuum source.

[acammer]

Your catch can setup only flows under vacuum - which you don't have at wide open throttle. That line is for venting crank case pressure, which with big ring gaps I'm sure you get a bunch of.

There are a few solutions, but I would get an Elite Engineering clean side separator. You'll cap the valve cover, and move the line to the clean side separator, which replaces the oil fill cap with a small air oil separator with a check valve so that it only flows when you've got pressure. The oil drains right back into the valve cover, rather than venting to your intake.

Eventually, if you're adding boost, you'll need to rework your crankcase vent system in a more comprehensive way to handle the additional flow you'll see, and a vented can would make sense.