Crankshaft bolt, oil or stud/thread lock?

[jacko4]

Evening all,
I'm replacing my crankshaft bolt and crankshaft pulley on my 1.9 TD, both bought from Brickwerks.
On the packet for the bolt there is a pictogram showing that you should oil the threads before fitment!
I would have expected that stud or thread lock should be used? Can anyone recommend which method I should use.
If thread/stud lock, what would you recommend.
Thank you

[kevtherev]

I wouls advise a light oil if it has to be torqued down.

I believe the pulley bolt is prone to sheer so the correct torque is important

[California Dreamin]

My memory isn't good but isn't this something to do with the type of bolt/washer originally used and that it would come loose. Once loose the pulley would then eat the keyway/end of the crankshaft.
The new type bolt and washer on the other hand don't come undone...so cure the problem. Something like that.

Martin

[jacko4]

Cheers fellas, just wasn't sure as I had read in the wiki https://club8090.co.uk/wiki/Parts_-_Crankshaft that:-

As a precautionary minimum, on any engine with the old (hex) bolt, fit a new (modded, 12-point) bolt and loctite it. Use the correct Part No. and tightening procedures Rebuild Part Nos and some torques

This is what the later bolt looks like (sorry, a bit blurred):

So I was getting mixed messages!
Maybe the wiki needs updating!

[California Dreamin]

QUOTE! So I was getting mixed messages!
Maybe the wiki needs updating!

I think you missunderstood..our debate was about what to apply on the threads NOT about the need or otherwise to change this bolt!

If yours has a normal 6 sided head then definately change it for one of the new 12 pointed bolts! (see link)

Correct torque and procedure is: 90NM plus a further 90 degrees rotation.

Personally I would use loctite 270 studlock...whilst in a liquid it will act as a lube when tightening.

http://www.brickwerks.co.uk/shop?page=s ... ord=Pulley" onclick="window.open(this.href);return false;

Martin

[jacko4]

No, not missunderstood!
Clearly I said

I'm replacing my crankshaft bolt and crankshaft pulley on my 1.9 TD, both bought from Brickwerks.

I've done enough searching to know that they need replacing.
The wiki says

and loctite it.

But on the pack it shows oil on the threads.
Oil and Loctite are not the same.
Clarity is all I ask!

[California Dreamin]

I'm afraid you are not going to get that 'clarity' as you put it as neither is wrong.
I think what you will find is the original method was to use oil but as 'problems' materialised with loose pulleys destroying the end of the crankshaft a new bolt was introduced with mechanics generally making the decision to take the additional precautionary measure of using thread lock.
I can't say I've heard of many problems arising after the new style bolt is used so the choice is yours.
I know which one I would do if it were mine....

Martin

[jacko4]

Thank you, Martin.