Diff back plate bolts

[SteveOS3]

I have files them 'somewhere safe so I don't forget where'......

Having removed the back plate from the diff' I need to get some more bolts. I can't find them on the bolts wiki, though.

I remember they were a high tensile 10.9 torx but not the actual size.

Does anyone know the size and where I may re-order?

Cheers,

Steve

[phillpot]

My guess would be M10, possibly M8, have you not got a few spare bolts around you can try?


lengthwise I'd go for thickness of cover + about 20mm. screw a bolt in, if you've got one, and check how far in it goes before bottoming.


Can't see that they need to be either Torx or high tensile

Edited by phillpot on Tuesday 1st November 15:27

[TVRees]

These might help .... some info. on the various diff bolts.
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[TVRees]

....... forgot to mention, standard 8.8 bolts are enough. Torx and 10.9 high tensile not required.

[SteveOS3]

I found one last night(in my work overalls). It's definitely a torx marked with 10.9.

40mm long in total, 10mm o/d on threads and 8mm inside, does that make it m8 or m10?

27mm thread length



Cant see any reason to have high tensile though.

[glenrobbo]

I think Steve is referring to these crownwheel cover plate screws ( ?9? off ):

[SteveOS3]

Yes, they are the ones

[GreenV8S]

I don't see it hurts to use a higher grade than necessary, but the minimum grade needs to be based on the load on the bolt i.e. how tight they're going to be torqued up, which will be limited by what they're screwed into. So I suggest you sort out the right torque before you go much further, and that should tell you what grade bolt you need.

[phillpot]

phillpot said:

My guess would be M10,

lengthwise I'd go for thickness of cover + about 20mm.

SteveOS3 said:

10mm o/d on threads and 8mm inside, does that make it m8 or m10?

That makes it M10,

SteveOS3 said:

27mm thread length

back cover about 7mm thick? ...