Jasper
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| posted on 29/9/05 at 07:56 PM |
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Bolt on drive shaft removal
Sierra rear end - all new to me ......
Ok, on the car I have there are new bolt on drive shafts to the new diff. I'm swapping the diff out for an LSD one. I've already had to
cut off two out of four of the prop bolts as they were locktighted in and just would not shift. Now I'm trying to remove the bolts that hold on
the drive shafts. Bearing in mind they are all new and not rusty - the f*ckers wont budge. Each pair seems to be linked by a flat bar but there seems
to be no locking tabs. Am I missing something here - just worried about breaking off the alley key....
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JoelP
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| posted on 29/9/05 at 08:02 PM |
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no locking tabs, and you probably WILL break the allen key! Its either a t40 or t45 bit, ideally in an impact wrench. Pick a quite moment of afternoon
and get your grinder out! much easier. 
Dont put torx bolts back in, get proper headed bolts someone will know the exact size.
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billy
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| posted on 29/9/05 at 08:06 PM |
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I found if you get a punch or chisel and give the bolt a sharp whack before you try and undo them that works a treat, before i tried that i snapped x2
torx bits, give that a go it will work for sure
luego-lo-cost finished,vauxhall 16v 2.0,twin 45s de-dion rear set up
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bob
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| posted on 29/9/05 at 08:24 PM |
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Jasper
I had to grind most of mine off and they were pretty clean as well,i can understand the loctite but i cant understand why people tighten them till
there fingers bleed.
Acording to the haynes drive shaft flange screws are tight at 38-43Nm (28-32lb old money)
As joel said replace with normal hex head 12.9 high tensiles i think M8 x 50 but best to check size.
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JB
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| posted on 29/9/05 at 08:55 PM |
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An impact drive (the type you hit with a hammer) may work.
I ended up using a chisel and big hammer.
John
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SJC
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| posted on 29/9/05 at 11:34 PM |
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Drive shafts and Flanges
Hi Jasper
I know it is not a answer to your question but the others have done that already ...
But....
I am after a set of new driveshafts and the splined shaft that goes through the hubs, Where did you get yours from as i am having trouble getting hold
of new items???
Would be a great help if you could shed some light???
Cheers
[Edited on 29/9/05 by SJC]
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Jasper
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| posted on 30/9/05 at 08:42 AM |
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Cheers chaps - I'll grind em off then!
And I've no idea where they came from - my car was factory built by SSC with all new parts about 2-3 years ago. I got hold of it 70% completed.
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NS Dev
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| posted on 30/9/05 at 09:59 AM |
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quote:
Originally posted by bob
Jasper
I had to grind most of mine off and they were pretty clean as well,i can understand the loctite but i cant understand why people tighten them till
there fingers bleed.
Acording to the haynes drive shaft flange screws are tight at 38-43Nm (28-32lb old money)
As joel said replace with normal hex head 12.9 high tensiles i think M8 x 50 but best to check size.
Yep, M8 x 50 Capheads in grade 12.9. I don't use loctite, but I do tighten them a touch higher then Haynes recommend (to around 48Nm) and I
ALWAYS lightly oil the threads with clean engine oil before tightening. I use this setup on my grasser which puts massive forces on the shafts and
they have not loosened yet. Without Loctite they come undone with a sharp crack on a 1/2" drive ratchet with an allen bit in it, then wind out
nicely by hand! (I have put them in and out a few times now!)
[Edited on 30/9/05 by NS Dev]
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Jasper
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| posted on 30/9/05 at 10:52 AM |
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Excellent .......
And the best oil to use in an LSD?
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smart51
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| posted on 30/9/05 at 11:58 AM |
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quote:
Originally posted by Jasper
And the best oil to use in an LSD?
Normal diff oil. Hypoid 90 according to haynes.
The limited slip part of a sierra diff is a viscous coupling and it is sealed. The remainder of the diff is just a normal diff and so you should use
normal diff oil.
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andyps
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| posted on 30/9/05 at 12:23 PM |
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My driveshaft bolts all came out without too much problem - I had soaked them periodically with WD40 for about a month or so before I tried though.
Andy
An expert is someone who knows more and more about less and less
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billy
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| posted on 30/9/05 at 09:50 PM |
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My way works...............Honest
luego-lo-cost finished,vauxhall 16v 2.0,twin 45s de-dion rear set up
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Jasper
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| posted on 3/10/05 at 07:22 PM |
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Billy - I'll give em a whack before cutting them off then!
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