Thread: Blowby

The improved rear main seal is by SKF there are a few pt no's on the pkt so I'll list them all.
The first one seems like a Landy one-BYG 2767
2. 200610-0218-03-03
3. #550651

I got mine about three years ago from SKF and from memory it was a bit hexy at around 80-90 buck mark.

Well worth the money though as I havn't had a drop of oil since. Oh and if you do get one they need to be oiled as I've heard of them chewing out. I'm not quite sure how your ment to do this but I used a needle and worked it under the lip and injected oil in that way.

Good luck though.

What happened with this Dougal?

Originally Posted by rovercare

What happened with this Dougal?

Not much yet.

I've done the same trip since and found that not keeping the boost needle pinned at 20psi for 5 minutes at a time lets the oil seal do it's job properly. I haven't had the time to pull the engine and replace the seal and laziness has kept me from measuring crank-case pressure.

I've also got a transfercase input seal which is making all other oil leaks insignificant. Didn't leak a drop for 10,000km then boom, drops a litre. I think the seal has popped either into or out of the case.

Factory rear seal (the one that's currently in there is genuine and maybe 20,000km old) is a:
NOK BH2195E
135mm OD
100mm ID
10mm thick.

I gave mine a BIG go the other day up some big hills at full noise, when I parked up at work faciing slightly downhill, I came out several hours later to find a small(70mm across) oil puddle under the bellhousing drain

Hasn't happened before or since. Breathing from the engine hasn't appeared to be any worse since then either. It does get worked hard towing defenders and discos etc from time to time, haven't noticed this oil leakage before now though. The rear seal on this engine has done 500,000+km, and is a 21years old next year.

JC

Mine has gearbag oil coming from the drain plug

I've had one of those new-fangeled rear main seals in for almost a year now, with no leaks touch-wood. It's well known that these engines are sus for rear main leaks, mine was not an exception, but these new seals appear to do the trick.

Now that I've said that it'll start leaking next week.........

Sorry Dougal, can't contribute much to your problem except maybe a blockage in your breather line, at any rate tick the simplest items off first before you reef the engine out.......

If you get one of those new seals, it needs to be fitted carefully with a special tool (normally) I think we did it with a piece of 75 and 100mm pipe, and a bit of goop

dont forget to check the back of the bottom half of the rear main seal housing for the mod hole thats the oil leak back to the sump. it stops your rear main from having to hold back main oil pressure and puts it back to plain old splash oil only.

Originally Posted by Blknight.aus

dont forget to check the back of the bottom half of the rear main seal housing for the mod hole thats the oil leak back to the sump. it stops your rear main from having to hold back main oil pressure and puts it back to plain old splash oil only.

Got any more info on this Dave?