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Propshaft Bolts & Nuts
grusks2 - 13/9/09 at 08:17 PM

After a spanner check after brands hatch, i notice the prop nuts and bolts onto the engine spocket adaptor have all move and slackened off ( but not fallen off )

Ive marked every nut and bolt with tipex so i can see if anything had moved.....which turned out handy.

Whats the best Threadloc grade to use on them.

There 4x allen head bolts with nyloc nuts at the mo......

[Edited on 13/9/09 by grusks2]


nitram38 - 13/9/09 at 08:29 PM

I would drill & lockwire them if you want to be sure...........


Dangle_kt - 13/9/09 at 08:51 PM

quote:
Originally posted by nitram38
I would drill & lockwire them if you want to be sure...........


That is the second suggestion of lockwire of prop bolts, but what pattern would you use?

I find lockwiring difficult with only two bolts, let alone the number on a prop... got a photo?


ReMan - 13/9/09 at 08:52 PM

I was able to fit nylocks behind mine too, you may have room?


grusks2 - 13/9/09 at 09:17 PM

i already have lock nuts on it, thats what came loose


I know there is blue and red thread loc, but dont know what is the stronger one, isn't there a number according to the strength


tegwin - 13/9/09 at 09:24 PM

What thread pitch are you using on the bolts?

A finer pitch and a slightly higher torque would perhaps be better?

All of mine are 5/16 UNF with those tall nylock jobies for extra friction

[Edited on 13/9/09 by tegwin]


Gergely - 14/9/09 at 11:18 AM

We use a Quaife reverse where the allen bolts are threaded into the Quaife flange, so no nuts can be used. We had the same thing: Bolts becoming use although we applied blue Loctite. Now we changed to red Loctite, and it is fine. But we check regularly, and the hex headed bolts + lockwires are already at hand.
I would suggest you use red Loctite and also use lockwires if you can...
Gergely


BenB - 14/9/09 at 11:52 AM

Studlock is the badgers nadgers. Just make sure you never want to take the prop off again....


bi22le - 14/9/09 at 10:03 PM

Dumb question alert.....

Whats lock wire? Any pictures??


procomp - 15/9/09 at 07:57 AM

Hi

You may find that the allen bolts do not have a very large head. This results in a smaller surface area of contact. Adding washers under the head IS NOT an option. But try replacing with bolts that have a large head diameter to give better surface area contact.

Cheers Matt


DarrenW - 15/9/09 at 05:15 PM

Very good point well made Matt - so you are basically saying you cant beat having a large head pulled up tight against a flange.
This is perhaps one of those areas where sticking to the OE solution can be a good idea. And of course adding the check to the regular checklist.


dean100yz - 24/9/09 at 05:40 PM

You only need to find my old post...I know all about this!!

Always check mine now before I go out!