Thread: Isuzu rear main seal

Not much, if you leave the plug out. Mine leaked this much or more every time I stopped for years before it got on the clutch plate. And having replaced the clutch and rear main seal I now find the gearbox is leaking as well, so it is going to have to come out again!

John

yep, that'll do it....

to confirm that its engine oil and not box oil add some hydraulic dye to the oil in the box or run it on atf for a while and monitor for a colour change.

I always find that the oil pump cover on the LT95 warps causing and unholy leak and oil pouring out every time you stop.
While its apart pull the oil pump apart get some wet and dry and a sheet of glass to make it all flat again it really helps.
Dont know much about Isuzus but I would look at the pommy component before the Japanese one lol

Originally Posted by djam1

I always find that the oil pump cover on the LT95 warps causing and unholy leak and oil pouring out every time you stop.
While its apart pull the oil pump apart get some wet and dry and a sheet of glass to make it all flat again it really helps.
Dont know much about Isuzus but I would look at the pommy component before the Japanese one lol

In my case the rear main seal was leaking - and of course, the engine oil being a distinctive colour, I blamed that, although I probably would have taken a closer look at the gearbox if I had not been in a hurry!

John

Thanks guys, I feel better now, I cant get to it till March- every weekend tied up!!
Its definately engine oil, but I'll check the gearbox when the engine is out, in case its both!!

I'm in the process of replacing a rear main seal and need some help with a part number.I'm chasing a seal with the thick wear sleeve(105mm OD) from isuzu.
Cheers Eric

Here are seal numbers as posted in another thread.

Originally Posted by Bearman

I will give you the numbers for both seal types
1.The number for the original one is an Isuzu number (also in LR's part numbers) 1096254020
2. The new type one is BYG2767 (LR number) Much better seal I am told but I havent fitted one yet......Apparently this is made by SKF. These are the numbers I was given to reference the SKF one, 200610-0218-03-03 #550651. You will either need 2 pieces of pipe ( 1 X 75mm and 1 X100mm) to fit it or the proper fitting tool.......... Brian

I put one of the SKF seals in my 4BD1T while it was out.

They are a Chicago Rawhide seal (the company was bought by SKF) and also have a CH???? number clearly shown on the seal, but I couldn't find anything in either CH or SKF catalogues.

Edit: Bearman said You will either need 2 pieces of pipe ( 1 X 75mm and 1 X100mm) ... There is a mistake there - 75mm is incorrect.

The seal has a sleeve on the inside that is not separable from the seal. It is necessary to have 2 pieces of pipe, one to fit the inner sleeve onto the crank (100mm od crank), and another to fit the seal into the housing (125 id housing from memory). They don't need to be used simultaneously - just fit the sleeve a little, then the seal a little, repeating until seal and sleeve are in place.

I have another number (may be military number) for this seal assembly NSN: 5330-66-149-1912

The Isuzu part numbers for the oversize rearmain seal and wear sleeve are:
Sleave 5123190033
Seal 2A9105

The wear sleave is hardened and chrome plated.

There is also a later seal that has a wear sleave as part of the seal assembly. I have the over size seal and wear sleave noted above fitted to my vheicle - all still going well after 80000ks since fitment

C H T