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        General >> Give/Need advice to/from others >> Drive shaft bolts
        
(Message started by: Mick Saunders on Oct 27^th, 2005, 3:23pm)

Title: Drive shaft bolts
Post by Mick Saunders on Oct 27^th, 2005, 3:23pm

:o Hi All.
Thought you might be interested in this ?.
http://www.carmechanicsmag.co.uk/cgi-bin/tftt.cgi?q=051105 . How tight are your bolts ?.
Regards
Mick

Title: Re: Drive shaft bolts
Post by kskjon on Oct 27^th, 2005, 8:39pm

Isn't this a known issue (referring to the mailing list)?

Title: Re: Drive shaft bolts
Post by Highlander on Oct 27^th, 2005, 11:35pm

Mailing lists currently talking about the hub nut which holds the bearing in but this is worth a check too

Title: Re: Drive shaft bolts
Post by howiedintheplace on Oct 28^th, 2005, 10:18am

I think this has been talked about before ???

The bolts are always easy to undo not like other ones like Sierra's that are a nightmare sometimes.
Never come across any loose ones or ones missing but they don't seem very tight.
If you have noises when driving along from the rear worth checking A.S.A.P ;)

Title: Re: Drive shaft bolts
Post by Eric_R on Nov 1^st, 2005, 12:12am

The Scorpio rear diff and driveshafts are largely carried over from the Granada, and I changed them on each car I had to quieten the drivetrain. The best method is to clear out the internal torx with a sharp pin so that the bit can get fully home and soaking them in a release agent overnight before even thinking of trying to remove them. I never found them easy - bending several torx bits in the process. >:( I have never heard of undisturbed bolts working loose on their own.

Our Scorpio bolts are supposed to be replaced with new ones if they are disturbed, according to the manual - using bolts that are designed to stretch - although you could probably get away with the old ones if you use torqseal.

My guess is that those bolts had been disturbed at some time and the correct torque not followed, or even not torqued up at all - mistakes do happen, which is why tyre places use two people to check that wheel nuts are torqued up properly before a car is allowed to leave.

Rumbling noises from the rear are best investigated asap, and if I were that guy I would be checking everything else underneath as well, in case something else has been missed. ::)

Title: Re: Drive shaft bolts
Post by howiedintheplace on Nov 1^st, 2005, 6:02pm

I guess I have just been lucky with my Scorp bolts then, as I said never had a problem undoing them but Sierra ones are a soak it & see job but I usally break a torx bit on them. >:(

Title: Re: Drive shaft bolts
Post by martin_rowe on Nov 2^nd, 2005, 8:36am

little tip on torx bits, buy the best you can afford, inpact grade are available. try to only use them in one direction, it means you need 2, though but it seems to work.

Title: Re: Drive shaft bolts
Post by Eric_R on Nov 4^th, 2005, 11:15pm

Yes, good tip, Martin, thanks.

I had to obtain the best quality torx bit I could find to remove those pesky driveshaft bolts, an impact set would have been better. I'll remember that ;)

Title: Re: Drive shaft bolts
Post by howiedintheplace on Nov 4^th, 2005, 11:32pm

Yeah good tips, I used to use Snap On torx on them but I used to have to wait at least a week for them to be swapped when they broke, now I use Halfords own & get them replaced when I want them ;D
Guess I am just heavy handed >:(

Title: Re: Drive shaft bolts
Post by Eric_R on Nov 4^th, 2005, 11:38pm

No, not just you, Howie. I've snapped loads ::)

Unless they're made of very high quality steel, the force applied to the thin shape weakened by the splines in the torx is enormous, and they either twist or snap. d**n things.

I suppose they're useful because they require much less area than a standard bolt, but used in areas where there are twisting forces they're a pig to get off.