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Roger 912

Rear Oil Seal.

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I am juggling with the cost of replacing the rear engine oil seal versus the cost of chucking oil in. It is not using/leaking that much oil, but everywhere I park I leave a tell tale sign that I have been there. Consumption (leak) is around 500 ml per 1000 kms.

 

If I decide to go the replacement seal route, is it an engine out job or is it easier to drop off the gearbox and axle.

 

Also, is there a better type of seal as my last one was replaced 6 years / 15 000 kilometres. ago and did not leak when it was first replaced but started after a year or two of weekend use.

 

 

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If it's a normal lip seal, I would not expect it to leak after only a year. I presume the shaft was inspected before simply whacking another seal in?

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If you don't replace the seal it's only a matter of time before leaking oil contaminates the clutch. :thumbdown:

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I understand that in the course of normal use, seals wear v slight grooves in the cranks, which can cause leaks.

I have been advised to alternate the position of the seal, but how you'd do this I'm not sure.

It may be a case of polishing both front and rear oil seal journals as well as bearing journals duringthe course of a rebuild?

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Is it an engine out job to replace this seal or is it simpler to drop out the gearbox and clutch housing?

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You have to take off the gearbox, clutch and flywheel...then remove the seal carrier plate. I reckon it would be easier with the engine out; maybe if you have access to proper garage equipment you might do it in situ, but I'd have it out. The rear oil seal is a tight fit in the hole bored in the seal carrier; there is no lip for it to be restrained by..as has been said, the seal does wear a groove in the crank; when assembling, the thing to do is simply to ensure that the seal is pressed in a slightly different amount so that it bears on a different part of the shaft.   

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