Amazon gearbox question.

[SwallownAmazon]

Question about the little rubber O rings for the three Allen screws that fasten the input shaft bearing housing to the gearbox casing inside the bellhousing:

Do they fit under the heads of the screws or on the threaded bit of the screw between the aluminium housing and the gearbox casing? My inclination is the latter as they would be severely squashed by the heads of the screws and probably rupture as they are tightened.

I havn't taken it apart yet and need the answer before taking it back to the place that changed the clutch a few weeks ago. Didn't happen beforehand but I now have oil dripping from the bellhousing area at quite a rate and I thnk they must have disturbed something to cause the leak. It's not overfull - first thing I checked.

New gearbox gasket set in the post from Brookhouse which includes a new lip seal, gasket and said O rings for the workshop to fit.

[Ron Kwas]

SwAm;

I know of which O'rings you speak, but I don't have a flange before me to check...I would imagine the flange has a pocket or groove machined in, so they have a place to be, but try checking the exploded assembly and parts diagrams on the GCP site...that should show you where they are supposed to go...those drawings are often enlightening...

Cheers

[SwallownAmazon]

Thanks Ron, but GCP site????
Don't recognise it.
I have an old B16 122S photocopied parts list but that doesn't show clearly how they fit.

[Ron Kwas]

Sw Am;

Genuine Classic Parts...Volvo's site. See: http://www.gcp.se/en/catalogues/

Good Hunting!

[SwallownAmazon]

Thanks Ron, didn't know of that resource before - now bookmarked.

Looks from the diagram that the rubber O rings fit under the heads of the bolts behind tiny washers...... They must be pretty tough to not rupture as the Allen screws are tightened! Unless of course, there is a machined recess for them.

.

[arcturus]

http://www.vp-autoparts.com/eu/main....g&artno=270745
Are you talking about the small ones in the picture or the larger ones?
Unless there is a groove machined for them I doubt they go as you say. They are or appear to be seals. Derek should know.

[SwallownAmazon]

Originally Posted by arcturus

http://www.vp-autoparts.com/eu/main....g&artno=270745
Are you talking about the small ones in the picture or the larger ones?
Unless there is a groove machined for them I doubt they go as you say. They are or appear to be seals. Derek should know.

Hi Arcturus,
It's the tiny ones I mean. They fit somewhere on the three Allen bolts that secure the input shaft housing (upon which the clutch release bearing slides) to the main gearbox casing. My view is that they would be crushed enough to be usless if they fit under the bolt head as in all the Volvo diagrams, unless there is a groove provided for them.
The only thing I can think of is that they fit in the gasket boltholes to make absolutely sure of sealing the threads.
Hopefully replacing all those seals and the gasket with a bit of blue Hylomar around it will stop my oil drip which is enough to now have to use an oil tray underneath.

[Derek UK]

O ring goes into the flange then the washer and then the bolt is inserted.

http://www.volvoamazonpictures.se/do...er%20train.pdf

That pdf section from http://www.volvoamazonpictures.se/do...n_parts_en.php

The garage shouldn't have disturbed anything that would cause an oil leak. Did they replace the rear main bearing oil seal while they were doing the clutch? If perhaps you had the flywheel refaced it would have been a good time to do that.

[arcturus]

Hope this helps. remove screw, clean out krap, insert seal, replace screw with washer.

[SwallownAmazon]

Derek, the flywheel wasn't faced as the people who did the work thought it unnecessary; also the rear main oil seal wasn't touched. It's definitely oil from the 'box that is dripping as it is lovely and bright yellow in colour. The engine oil is quite a bit darker with the Molyslip I added at the last oil/filter change.

Thanks Arcturus, those photos answer the question. You can see a small chamfered recess machined in the cover that the O ring will sit in as the Allen bolt is tightened down onto the surrounding area without crushing it.

Many thanks to all - amazing how the power of the internet works!