I have a 4x4 sapphire cosworth and dismantled the head a while back. In doing that, I fu**ed a bolt that holds the cam cap nearest the pulley (one of two big ones at the front of the head, not the eight little ones).
The bold had an allen key head on it, which I ended up drilling out cos my allen bit slipped in it.

I have just tried to order a replacement, but no-one has ever heard of an allen bolt fitting for this, according to microcat, it should be a stud, washer and nut fitting.

Checked escos diagrams too and those show the same stud/washer/nut combination.

I am a little puzzled as to what could have happened there, any of you seen this before ?

Thanks in advance.
Greg

 

m8 all the ones i have seen have allen key type bolts on the caps nearest the pullys
and nuts and washers on the rest!

 

The No:1 and No:6 cam main cap (holding the ball bearing and oilseal are stud and nut on all 2wd and M6 allen bolts on all 4wd.


Cheers
Roger

 

Cheers, just to be sure, this is what I am talking about:


and

 

Yes those are the 4x4 caps,You can buy high tensile allen bolt.

Roger

 

Cool - on the phone now.

 

All sorted, the pictures on microcat are wrong, but when you try and order the stud, it tells you can't order anything else that's related to it - the allen bolts are what you get when you order the studs.

 

Ive dug this old thread (excuse pun) up as im after some info on this m6 bolt.
Does anyone know what the pitch thread is for it ?
As ive got a cam cap bolt that has that feeling of stripping its thread if tightened any further,and its not that tight now
I'm thinking of putting a helicoil in,but want to order the right size before i pull it apart.
Any help appreciated

 

How much do you tighten these upto?

 

Well as no one new the size i had to take a bolt out,measure it and helicoil it.
Also fitted new cam oil seals,and no more leaks now !