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Old 04-16-2018, 01:08 AM
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glester glester is offline
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So...I just finished replacing the crank on my 300TDI and also swapping the auto for a 5-speed (R380). https://discoweb.org/showthread.php?t=96637

After driving it around I noticed that oil seems to be leaking right out of the wading plug hole at the bottom of the bell housing. It seems likely that it's the rear main seal or a t-seal.

You think it would be easier to pull out the radiator/intercooler and pull the engine forward with a crane or pull the transmission back and drop it out?

Also, I've been reading a bit on how the rear main seal can be a bit sensitive. It was a new one and put on using the plastic ring that helps get it onto the crank. Anyway, any advice here would be welcome.
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Old 04-16-2018, 07:36 AM
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I hate pulling transmissions, so I would pull the motor out to do it. I would only consider pulling the transmission if I was doing the work on a lift.
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Old 04-16-2018, 07:43 AM
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In standard 300TDI is used to move engine forward, only loosing viscous fan, in order to get the few centimeters to change clutch.
All hoses are prepaired to.
But in order to loose flywheel screws you must unscrew both engine supports from block sides, let engine down a little.
Rear main seal is not a perfect thing, you see.
Some replace these rubber inserts above with RTV silicone sealer like Loctite 590 black.
And Crankshaft surface in seal working area must be perfect
Some use to modify this seal adding the 2,8 seal that includes two more screws in the bottom.

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Old 04-16-2018, 09:52 AM
Leadvagas Leadvagas is offline
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If I have it on a lift, then pull trans, no lift then pull the motor, or slide it forward.
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Old 04-16-2018, 10:56 AM
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Quote:
After driving it around I noticed that oil seems to be leaking right out of the wading plug hole at the bottom of the bell housing. It seems likely that it's the rear main seal or a t-seal.
Just a little thing... Give it some kmts, may be seal adapts and leak can disappear or become to be very small.

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Old 04-16-2018, 11:14 AM
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Quote:
Originally Posted by German Gruner View Post
Just a little thing... Give it some kmts, may be seal adapts and leak can disappear or become to be very small.

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Yeah, I'll give it a bit more time and see what happens. Thanks.
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Old 05-06-2018, 04:14 PM
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Gave it more time and still was leaking. Pulled the engine out again this week and it was leaking from the base of the rear main seal. Maybe a bad gasket. Anyway, I pulled off the rear main seal, used Right Stuff as a gasket and put it back on. So far it's all good. There were some other small leaks that we're more clear after pulling the engine out. Small leak from the cyclonic breather and from the return on the turbo. Took care of those as well.
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Old 05-06-2018, 04:40 PM
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Good luck! We cross then our fingers!

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