Oil leak 200 tdi.

Kenbo · Monday at 10:09

I've been helping my brother to replace the rear crank seal and main gasket but the engine now has a big oil leak.
All taken apart again as we blamed the tee seals but I'm totally confused by the hole in the big end cap. The engine had previously been oil tight but with a lot of sealer on the gasket.
Anyone seen this before?

tottot · Monday at 11:45

First thing, that is the rear main bearing cap I guess? Did you fit a new gasket between block and flywheel housing? They come with new sealer pre applied in the right places.
Did you use an Original Dowty type crank seal. These have to be fitted dry [no oil] using the guide cone provided?

Kenbo · Monday at 12:22

My query is that hole in the end cap. It will allow oil to escape and I can't see it's purpose. The gasket between the block and flywheel housing should stop leakage but didn't. Luckily the leak was noticed before fitting the engine. I'm wondering if the hole is a casting defect?

Kenbo · Tuesday at 11:00

I've attached another photo of this rear main bearing cap, can anyone tell me the purpose of the hole in the side? It seems to be the cause of a big oil leak despite new gaskets.

tottot · Tuesday at 11:28

Does not look like a fault, more of a drilling. Likely was there before you took engine apart. Would be nice to know what it's there for though.

marjon · Tuesday at 11:49

I dont know the engine but will say this in my mind.
The whole is to drain oil that comes out of the bearing journal on the backside next to the seal, if oil filled that cavity then it would apply oil pressure on the seal.

So yes its needed.

I could be totally wrong though

J

Kenbo · Tuesday at 21:55

In my opinion there's no need for that hole as it allows oil out the end of the block and the big gasket at the flywheel housing has to stop it. We've no choice, going to build the engine and box up again but with lots of sealant. Thanks for the comments.

steve2286w · Tuesday at 22:28

LRO Spring 2000 - August 2000 - 200TDI - Engine rebuild Part 1 - 4

Part 1 Part 2 Part 3 Part 4

www.turnerengineering.co.uk

This might be useful in the rebuild, mine has the hole too

Kenbo · Wednesday at 00:01

Thank you. I'm not actually familiar with this part of the engine so I'll see the lt in a few days.

lynall · Wednesday at 06:04

do not put too much sealant on it that it oozes inside the crank case, overtime it can drop off and block up the oil pick up strainer.

Kenbo · Wednesday at 14:24

Yep, good advice, I saw a video recently: wet belt replaced and sealant everywhere, and made it to the oil strainer.

marjon · Wednesday at 14:37

Kenbo said:
In my opinion there's no need for that hole as it allows oil out the end of the block and the big gasket at the flywheel housing has to stop it. We've no choice, going to build the engine and box up again but with lots of sealant. Thanks for the comments.

I wouldn't think that a correct oil level reaches that hole, so oil only comes from it as a drain.

J

Oil leak 200 tdi.

Kenbo

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tottot

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Kenbo

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tottot

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steve2286w

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LRO Spring 2000 - August 2000 - 200TDI - Engine rebuild Part 1 - 4

Kenbo

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lynall

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Kenbo

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marjon

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