valve cover

[microgalant]

I've some problem with my car.
I just turboed my 4g64 engine (4g63 head),and now i see oil comming out the breather of the valve cover. what can i do to prevent this? (besides using oilcatchcan)
And i also see oil in the turbo inlet.
They told me it can be the oil return line, i'm using a gt35 turbo and a -8 steel braided oil return.mybe if i changed it to a -10 oil return line it can help?

 

[dsmmike50t]

Try a catch can It cleaned up all the oil in my intercooler pipes and will probably get rid of the oil in your inlet.

edit: Sorry just realized your looking for something besides an oil catch can.


btw why arent you looking into getting a catch can?

 

[synthetek]

You can put a fuel filter in the line that goes from your valve cover to your intake. Install a catch can for your DSM (2G) A catch can would do the same thing.

 

[turbosax2]

Instead of using a fuel filter, use a Husky air filter from Home Depot.

Home Made Oil Catch Can Photo Gallery by AZ Solo at pbase.com

 

[My1GLaser]

You can put a check valve inline b/w the intake and the pcv valve in the valve cover, similar to this. It worked well for me and there are many different type check valves. I just happened to find this one at Grainger to be the simplest solution. Grainger Industrial Supply: Valve,Check 6D914 You will need some misc. brass fittings from the hdwe store to adapt it to your breather hoses.

Supposedly there is also a clear plastic one that people run, but I can't remember where I saw it.

Basically the PCV valve doesn't hold back boost very well. You can actually blow thru it with just a few psi. The check valve holds 250 psi, and opens at like .3 inhg of vacuum IIRC.

 

[architechnik]

That Husky compressor filter, does that have an internal check valve?

My1g, why do you have the check valve and pcv valve installed in your setup? Could the pcv be just replaced by the check?

 

[snowborder714]

That Husky compressor filter, does that have an internal check valve?

My1g, why do you have the check valve and pcv valve installed in your setup? Could the pcv be just replaced by the check?

The Husky compressor filters don't have built-in check valves. It's just a filter.

And about having a check valve and pcv valve (I know I'm not my1g, but I have the same setup) - PCV valves have a high failure rate so I included an inline check valve to make sure the system works properly. And my prior reason to keep the PCV valve there was because you can't pass emissions without it. Right now, it is basically a built-in nipple off the head so I don't have to put something else there. It just makes it easier.

 

[turbosax2]

That Husky compressor filter, does that have an internal check valve?

My1g, why do you have the check valve and pcv valve installed in your setup? Could the pcv be just replaced by the check?

No, the Husky filter does not have an internal check valve. Part 64175 here can be used between the catch can and intake manifold on the pcv line. So it would go valve cover > PCV > catch can > check valve > intake manifold. The check valve does the same thing the PCV does, just better. The general consensus is to leave the PCV and add the check valve to the system. See the links below for more information on this.

Here is some good reading on the topic.
http://www.dsmtuners.com/forums/newbie-forum/254437-oil-catch-can-help-needed.html
http://www.dsmtuners.com/forums/newbie-forum/229338-stupid-pcv-question-3.html

 

[microgalant]

and what do you guys think about the oil in the turbo inlet?

 

[architechnik]

I currently have brass fittings routing at a 90* angle to a pcv valve because it is so incredibly difficult to change the pcv. This was all a test system with clear tubing to check the amount of oil expelling. After about three months, the inside of the tube is pretty well caked and I'm switching to a more complete system.

Do you guys have any trouble with too much airflow through the breather system into the intake or are yours fairly well balanced?
Sorry for the sub-threadjacking.

 

[architechnik]

Oil in the turbo inlet is likely from the side return from the valve cover. A catchcan system can fix this as well, but as I was talking about the venting system, it can also be replaced.

That side outlet is supposed to take air into the valve cover when needed, but it flows backward when the turbo kicks in and the air cannot escape through the pcv valve. Disconnecting this system and installing a valve cover vent filter will work... sort of.

EDIT: There is also another line that comes from the bottom half of the engine, venting the block, but I have found this one to be less of a problem.

 

[My1GLaser]

I am running the PCV also so that it still fows the same amount of air thru the crankcase, no more, no less. IIRC the check valve is twice size as the PCV, so I didn't want to be drawing out too much air and sucking oil into my intake.

Galant,

technik is right about the reason for the oil in the turbo inlet. I just took my breather line off that air inlet pipe and put a breather filter on the end of the hose and capped the pipe. I made the breather hose a little longer and just wire tied it off down there somewhere. It gets VERY LITTLE oil in it. Just don't get it too close to the bottom of the car cause it could suck up water if it rains. I've never had a problem and mine is very low. Here is a pic of the breather filter I use. Advance Auto Parts breather filter