ERP
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| posted on 11/8/06 at 06:41 PM |
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Bolts Cosworth Driveshaft to Diff?
I'm missing some bolts, they look like they are 10x1.25x60 Torx head bolts (confirmation anyone?), but I can't find anywhere to source
them online. I assume I can just swap these out for socket head bolts if I can find them in the right size.
Can anyone give me a lead on where to find these?
Also there appear to be what look like washers that run between pairs of the bolts, one axle has 3 or these the other one 1, I'm assuming that
it should be 3 on either end? or are they used for balancing?
Any idea where I might source them?
Thanks
[Edited on 11/8/06 by ERP]
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pathfinder
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| posted on 11/8/06 at 06:50 PM |
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try namrick.co.uk , got a set of socket heads for the same job from them last week!
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RichieC
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| posted on 11/8/06 at 06:52 PM |
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hi,
Yeh just replace them with cap head allen bolts, 12.9 grade ideally. The originals are available from Ford but theyre a lot more expensive than
capheads from your local fastener store.
The washers are to avoid the bolts loosing torque and again are available from Ford, part no: F1018715. Whether fitting them is necessary is a matter
of some discussion, but I have them on mine, with threadlok and theyve never moved. I know of other owners who didnt bother and they have had loose
bolts.
Rgds
Rich
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RichieC
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| posted on 11/8/06 at 06:53 PM |
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Forgot to add, theyre M8x50mm standard thread not fine.
Rgds
Rich
[Edited on 11/8/06 by RichieC]
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ERP
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| posted on 11/8/06 at 07:12 PM |
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quote:
Originally posted by RichieC
Forgot to add, theyre M8x50mm standard thread not fine.
Rgds
Rich
Hmm I just remeasured the bolts that came with the driveshafts (they may not be the originals but they do screw into the holes in the diff).
I don't have a metric gauge but I measure them as 0.390x2 3/8 inches, that says 10mm to me.
Perhaps the cosworth drive shafts use a different fastener?
Maybe I'll go and pick up an M8 standard and an M10 fine bolt and what screws in.
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RichieC
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| posted on 11/8/06 at 07:14 PM |
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Not sure what spec the Sierra they came from was, but Im using a Diff from a 4x4 cossy with shafts from a 2.0 RWD car, both the shaft and diff are
8mm.
Also, they come up as M8 x 50mm on the Ford parts catalogue.
The US spec cars could of course be different but Id be suprised. Also a possibility although doubtful, the diff may have been modified at some point
in its life.
Rgds
Richie
[Edited on 11/8/06 by RichieC]
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ERP
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| posted on 11/8/06 at 08:21 PM |
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The diff is from a european cosworth, I had it shipped from the UK, though I don't know what spec.
I've just tried both M8 and M10 bolts and it's definitely M10x1.25, also a 50mm bolt would leave less than a cm of thread to attach to the
diff.
The parts don't look modified, so I have to guess it came from a different application. Is there an easy way to ID the diff?
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RichieC
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| posted on 11/8/06 at 08:46 PM |
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Youre definately talking about the bolts which attach the bolt on shafts to the diff?
If the diff is from a 4x4 Cossy it will be a 3.62:1 LSD. If its from a 2wd or an Escort Cossy, it will be the larger 7.5". Im not sure what
size bolts the 7.5" diff takes but it could be a longer, larger diameter bolt.
For the 7" diff though, the bolts are definately M8 x 50mm - confirmed from the Ford parts catalogue.
To identify the diff see
here
Rgds
Rich
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jollygreengiant
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| posted on 11/8/06 at 08:51 PM |
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Early Granada/Sierra used M8, later Granada's (don't know about Sierra's) used M10.
My doner car is a G reg Granada, but I managed to source a late Granada Diesel (N reg) Diff for £0 with a much better ratio. The Difference in the
drive shaft bolts mean that I shall have to use the later drive shafts.
Also the faces between the CV joints and the drive flanges (diff and outer) have rubber sealing gaskets on the later models.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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ERP
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| posted on 11/8/06 at 09:16 PM |
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Thanks guys.
If I'm reading the numbers correctly, it looks like it's from a 2WD Cosworth. It is a 7.5inch unit.
The only problem I have now is sourcing 10x1.25 socket head bolts, I can only seem to find them with standard pitch.
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Liam
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| posted on 12/8/06 at 11:47 AM |
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2WD cossies have larger flanges and CVs so that would explain the larger fastener. If you really can't find a metric supplier over the pond I
guess you could get some shipped over from here - should be cheaper than shipping the diff must have been! In fact if you're stuck I could
easily post some over myself for you if you paid shipping. I'd be surprised if your friendly local fastener shop can't get them in
though.
quote:
I've just tried both M8 and M10 bolts and it's definitely M10x1.25, also a 50mm bolt would leave less than a cm of thread to attach
to the diff.
Just need to confirm the length. How thick is the flange - i'd be surprised if you have more than a cm to thread into anyway so maybe they are
50mm. If the bolts are too long they'll come out the back of the flange and hit the diff case.
Finding them double washers might be hard - you could just make two more if you were bothered, or forget them and use normal spring washers or
something. Can't see the point in the paired up washers myself over normal washers (wont give any extra locking feature). I read somewhere it
is just to spread the load over the thin CV boot cover to stop it being ripped off over the small bolt heads after years of corrosion.
Hope that helps
Liam
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ERP
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| posted on 12/8/06 at 04:57 PM |
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Thanks again.
As it happens unusual metric fasteners are a pain in the arse to find in the States. However I did finally find a supplier.
I've measured the bolts that were in it and they're 60mm which is what I've ordered. I also found a picture of the two drive shafts
side by side that shows the flanges are both different sizes and different depths.
Having looked through the archives on this one I'm going to without the paired up washers unless I get really bored in which case I'll
make some.
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