Rear Crank Oil Seal - Options For Repair
Rear Crank Oil Seal - Options For Repair
Author
Discussion

BlueFish

Original Poster:

54 posts

186 months

Wednesday 7th March 2012
quotequote all
I just took the Chim out of winter hibernation and noticed a small patch of oil on the garage floor. After getting it up on the ramp at a friends MOT centre and removing the cover from the bell housing it seems the oil is coming from the back of the engine and my first assumption was rear crank oil seal.

If this is the case, is this a job that can be untertaken by my local garage (not back street but modern prmisies and vey competeant) or should I only really use a reputable TVR specialist?

I an based in Lincolnshire not far from Grimsby and the closest specialist I know of is Selby TVR www.selbytvr.co.uk

Could the oil be coming from anywhere else, any comments / advice welcome.

I want to get it done soon as I am avoiding driving it for fear of knackering up the clutch with oil!

Ribol

11,995 posts

288 months

Wednesday 7th March 2012
quotequote all
More likely to be coming from the back of the sump and getting blown in down behind the half moon plate ......................... hopefully smile

BlueFish

Original Poster:

54 posts

186 months

Wednesday 7th March 2012
quotequote all
We only had a quick look on the ramp as the test station was busy, I will get it back and have another much closer look. So from what you are saying it would be possible for oil to get into the bell housing from the rear of the sump and seep out of the lower rubber cover?

I hope this is the case too :-)

Ribol

11,995 posts

288 months

Wednesday 7th March 2012
quotequote all
BlueFish said:
So from what you are saying it would be possible for oil to get into the bell housing from the rear of the sump and seep out of the lower rubber cover?
Yes, but if there is that much oil in there it would be worth taking the two bottom screws out of the plate to let the oil out until you get it sorted, before it gets to the clutch.

BlueFish

Original Poster:

54 posts

186 months

Wednesday 7th March 2012
quotequote all
Thankfully there is not a lot of oil but will get it back up on the ramp asap and remove the screws u suggest. thanks for the tips, fingers crossed.

gizmo67

83 posts

232 months

Thursday 8th March 2012
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The best advice i could give would be to give it a good clean and leave the plate off the bellhousing and give it a run and re-check for the leak. 9 times out of 10 it is usually just the sump sealant has got old and is leaking.
If it does turn out to be the rear crank oil seal then the gearbox and bellhousing will have to be removed to replace the seal and the only awkward part of the job for a garage would be removing the gear linkage if it is the older style linkage on a T5 gearbox, it can just be a little bit fiddly. But to remove all of the different gearlever's the centre console will have to be removed.

BlueFish

Original Poster:

54 posts

186 months

Thursday 8th March 2012
quotequote all
I went to my usual mechanic today and he suggested the same that he would put it on the ramp, clean it all up and then run it and give it a thorough inspection. By tommorrow afternoon I should have the diagnosis.


Dodsy

7,175 posts

257 months

Thursday 8th March 2012
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Just had the exact same problem. Thought at first it was the rear seal. Then thought it was the sump (which was leaking a touch).

Turned out to be the valley gasket, it was leaking at the ends where the seal had gone hard but it wasnt obvious where the oil was coming from until it was all cleaned up.

BlueFish

Original Poster:

54 posts

186 months

Thursday 8th March 2012
quotequote all
Dodsy said:
Just had the exact same problem. Thought at first it was the rear seal. Then thought it was the sump (which was leaking a touch).

Turned out to be the valley gasket, it was leaking at the ends where the seal had gone hard but it wasnt obvious where the oil was coming from until it was all cleaned up.
Was that a big job to put right?

Dodsy

7,175 posts

257 months

Thursday 8th March 2012
quotequote all
BlueFish said:
Was that a big job to put right?
Yep.

rocker covers off, plenum off etc - basically you've got to get down to the valley between the banks , then its a huge gasket to replace.

BlueFish

Original Poster:

54 posts

186 months

Thursday 8th March 2012
quotequote all
Dodsy said:
Yep.

rocker covers off, plenum off etc - basically you've got to get down to the valley between the banks , then its a huge gasket to replace.
Maybe not as bad as the rear crank oil seal, at least I will know tomorrow and can get it sorted asap, then I can get on with the list of jobs I need to do before the season starts in anger.

Oh the joys of TVR ownership :-)

BlueFish

Original Poster:

54 posts

186 months

Friday 9th March 2012
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Its confirmed its the rear crank oil seal, got it booked in for Wednesday thanks for all input guys. Might sdo clutch while box is out, any reccomendations of where to obtain would be appreciated.