Rear main seal problems with Supercharger

[antman]

I'm a longtime follower of this forum and first time poster.

I'm looking into installing a supercharger on my car. I'll be going with the canned tune and other than the supercharger the car is going to stay stock at least for a while. I've read and heard that installing a supercharger causes the rear main seal to go out due to the increased CC pressure. I'm not sure if this comes up only on cars with custom tunes and other mods. I was wanting to hear if any of you guys with just a supercharger installed have had any problems with the rear main seal.

[EliteCZM523]

With proper Crankvase ventilation, this should be no problem

[Supercharged SS]

You'll need to be making a lot of boost to push oil out of the rear main. Mine took 12+ psi and it leaked a bit. Dual catch cans and a vent cover breather and its been fine for years. Plus it only happens when you abuse the car. IE the track.

Catch cans are still a good idea.

[Alvin@PCMofNC]

I'd say about 20% of the brand new stock cars we have come by are either weeping out of the rear main or leaking out of the oil cooler. I bet its just a coincidence that it got a bad rep for causing leaks.

[east TX Muscle cars]

VENT VENT VENT

Proper ventilation will keep you from blowing the Rear main out

[Jessika]

Originally Posted by east TX Muscle cars

VENT VENT VENT

Proper ventilation will keep you from blowing the Rear main out

+1

[SC2150]

Let us (or Jessika) know if you want the solutions, but we see seepage on far to many bone stock.

[Jessika]

I will add that my old G8 had rear main seepage pre-blower. And even with 8-9psi (and two difference blowers) I never saw it progress.

[BowenSS1]

I had a rear main leak before s.c!

[slowfofo]

So after reading all this, do you feel more confident? I am about to go F/I (forced Induction) as well. I have had several F/I cars in the past and I can tell you leaky Rear main seal is part of the territory. But like they say above if you vent the valve cover your fine. Plus you can purchase a 1LE vent from the dealer that helps a lot. In short if you limit your car to less than 8psi - I am sure you will be fine

[antman]

Thanks for everyone's feedback! Makes me lean more to getting one put in. Is there anything more than putting on a valve cover breather to get proper ventilation?

[Jessika]

Depending on goals, a catch can is a great investment to go with that breather.
For most, the stage 1 is perfect. The stage two is awesome though.

[Supercharged SS]

Originally Posted by antman

Thanks for everyone's feedback! Makes me lean more to getting one put in. Is there anything more than putting on a valve cover breather to get proper ventilation?

In my case Ted had to adjust the tune. Something about unmetered air because it enters not through the maf.

[ayousef]

Originally Posted by antman

Thanks for everyone's feedback! Makes me lean more to getting one put in. Is there anything more than putting on a valve cover breather to get proper ventilation?

let me tell you of my personal experience a few days ago, a friend of mine with a 13psi TVS2300 416 silverado truck kept on blowing the rear main seal, a mere 5 seconds of full throttle were all he needed to kill a brand new seal, he had a breather on the oil cap, passenger side breather hose into the CAI after the MAF and the drivers side going into an RX catch can and into the blower.

His engine definitely has loose ring gaps so you can see quite some blowby at idle BUT, when we connect the drivers side to the RX catch can it STOPS venting, we put the hose on the other opening and same thing it does not vent, im sure when connected to the blower it was venting a LITTLE bit because he was getting a little oil in the can but as soon as we took off the RX catch can and put another some crappy china catch can with no mesh no check valve or weird stuff just as a method of collecting oil puddles from going into the inlet tube or blower and not trying to condense the oil in the otherwise gaseous blowby.

Yes we havent spoken to RX about it, but if RX wants I can even shoot a video of this happening since the blowby is very obvious when you point a flashlight at the PCV hoses.

You will not have those issues unless you really come up with something crazy like I guy I know who blocked the PCV hose completely because some idiot on the forum told him to do so

PS, not trying to start a fight here either.