TE 20 PCV valve

Tbucketboy · Sep 22, 2017

Hi guys, I'm in the process of putting my TE 20 engine back together after a head gasket replacement, and noticed a lot of oily scum hanging on the underside of the valve cover. The vent tube is clear & clean, so I got to thinking, (scares me when that happens!) Maybe I could put a pcv valve somewhere in the system and plumb it to the port in the intake manifold and maybe get a little more positive cleaning action. Has anyone tried this, and what approach did you take. Would appreciate any suggestions, tips, or comments. Thanks

Steve@Advance · Sep 22, 2017

I've done it on various engines with varying success.

If the rings are good, little blow-by, it will work. But if it is puffing out the crankcase breather, it may cause excess crankcase pressure, depending on how well you can reroute the breather tube.

It will need filtered air back into the crankcase. Don't want the breather tube drawing dirt into the engine. Also want the best "flow through" the engine you can devise.

I would do as little cutting or drilling as possible, just in case it causes problems and want to go back.

For the valve, I just picked one for a 4 cylinder, whatever barb arrangement worked best. Some are threaded, can be screwed directly into the intake.

Patch700 · Sep 22, 2017

Food for thought, on my small block chev in the race truck I had the headers tapped 1/2 npt and put a fitting in there to accommodate a length of hose that then runs up to each valve cover and finally to an old style Chrysler valve cover breather.. What this does is provide a very positive evacuation system for the crankcase... It works and is very simple.

I can tell you that it sure saved on the slobbering that normally accumulated around the valve cover and oil pan..

Good luck and let us know what you come up with.

Patch700 · Sep 22, 2017

I should add to my post that when you do put any type of fitting into the exhaust that it need to be installed at a certain angle and with the fitting or pipe "slash cut" if you will so it indeed scavenges as the exhaust blows past it.. If you were to simply drill and tap a hole at a 90 degree angle to the flow and then leave the pipe or fitting slightly below flush but again with a 90 degree cut , the exhaust flow will not pull any vacuum from the fitting.. The slash cut and angle of fitting needs to point in the direction of exhaust flow.

TE 20 PCV valve

Tbucketboy

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Steve@Advance

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Patch700

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Patch700

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