Hi I have a very persistent oil leak I have replaced the rear main seal twice using a speedi sleeve the 2nd time to help ensure it sealed but bottom of oil pan and transmission still have oil drips any help???

 

With you replacing the rear main seal repeatedly it sounds like you're building too much crankcase pressure because you're boosted. This is common in the turbo world. Head over to the TurboRanger forum and you'll find a design for a catch can/crankcase vent that solves this problem. You'll probably wrap up about $100 in it.

 

+1 ^^^^

When you add Boost you increase Blowby, the explosive gases that "blow by" the piston and rings when a cylinder fires, all piston engines have blowby
So crankcase gets more pressure added to it when cylinder pressure is higher
The oil drain holes in the head go directly to crankcase so valve cover area is a direct connection to crankcase which is why PCV Valves are often on the valve cover

The PCV(positive crankcase ventilation) system's sole purpose is to prevent Blowby from polluting the air
In the old days there was a tube on the lower block or upper oil pan that had a filter and was pointed down at the ground, it dripped oil constantly, lol, the blowby vaporizes some of the oil on the cylinder walls and piston sides as it passes, this is where oil vapor in all engines comes from, spraying oil out of bearings and valve train can NOT vaporize it, if it was that hot bearings would melt, lol

So PCV system was added to stop raw exhaust(blowby) and oil vapor from escaping the engine
You should use a different PCV valve maybe try one rated for V8 engine, i.e. twice the Blowby, to lower pressure in the crank case

And yes a Catch Can to prevent oil vapor from reaching the intake, Catch Can allows the HOT oil vapor to condense on cooler surfaces, a Catch Can should have a stainless steel mesh inside so there is alot of surface area for oil vapor to condense on
And Catch Can should be mounted lower than the intake vacuum hose and PCV hose, so condensed oil in the hoses runs DOWN into the can when engine is off

 

Hello I have looked at the pcv system and it appears go have a catch can routed. So the next step will be to install a different pcv valve to allow for the increased pressure? Also would the entry back in (valve cover location) has some type of breather valve on it is it neccessary or should I just have the hose from the catch can to the valve cover?

 

Catch can should be between PCV Valve and intake manifolds vacuum source

Valve cover/PCV Valve==================catch can=========================Intake manifold

The other part of PCV system is the Breather or Vent hose, it can remain as is, usually hooked to a Filtered air source, like air filter box or intake plenum(air tube), it allows fresh air to come in as needed

You can tell if PCV system is working OK by pulling out the dipstick and starting the engine, there should be negative air flow at the dipstick tube, it should be sucking air in not blowing air out, its not like a vacuum, lol, but should hold a small piece of paper in place

 

Got looking in there I tested the dipstick for pressure and it did indeed have positive pressure which blew off a piece of paper. There is no line running from intake to pcv piping appears to be capped off. On the side of the lower case under the intake it appears to have a brass fitting installed with rubber pipe running straight to catch can. Very confused as to how this is supposed to be put together. I'm assuming the brass fitting coming straight off the crank and also no vacuum line from air intake is what Is causing all the issues?? Right now as it sits the routing goes fitting on lowercase=========catch can========= valve cover

 

Turbos are tricky for PCV because the normal vacuum source, intake manifold, looses vacuum and goes to positive air pressure when there is Boost.
Which is why yours is capped off

But there would be Ported vacuum available, its on the air tube BEFORE it goes in to the turbo
Turbo blades won't like ANY oil vapor, so you need a good filter and catch can setup, in factory turbos they use electronic PCV valves because vacuum is, in essence, reversed, low Ported vacuum at idle, high Ported Vacuum at high RPMs.
So I think you could run without a valve, try a restricter to start, smaller hose at the air tube, then see if you have some negative flow at dipstick tube, if still positive go to larger hose

Never set one up but there is plenty to read about this, Google: turbo charging and PCV Valves

 

So I believe I have the system routed properly now it uses a vented catch can which I believe doesn't require vacuum. It's how things were setup before I just replaced hoses and made sure everything was good. Still having oil drops coming off front of transmission bell housing. But in looking it seems like there is no oil Mark's on the flywheel so I'm a little unsure of where it Is coming from I dont see any spots up higher could my oil pan seal be leaking and it not be getting on the flywheel?