Broken bit of casting on cylinder head :(.

Whilst removing the alternator adjustment bar off the cylinder head (there's a bolt lug it screws into), the bottom of the casting of the lug has broken off. Reckon it was over tightened in past.

Will a good dose of Aruldite do the job or does it need specialist welding ? 

Have you got a picture of how much is broken off?

I'll get one put on in morning -


i know know you can get weld weld glue -

Typical - all was going so well. 

you could try jb weld, I think later cars had a bracket with lifting eye in that the arm mounted on, it might help spread the load if you could get one to fit.

I've used JB Weld and it takes a thread really nicely. Worth a try.

Cheers guys - I assume it's obtainable at the likes of Halfords etc ?

Yeah - £7.99 at Halfords, but less with the trade card or you can get it on Amazon prime for about a fiver if you have it.

Could you fit a slight thinner bolt through the hole with a big washer on the back so it's not screwed into the head as it might put less strain on the threaded part, new nut and washer on the other end?

I recon you may have problems glueing it back on with JB weld and bolting on the alternator bracket with the original bolt, I could be wrong as I've not used JB weld before…

If you are going to use JB-Weld, it is best to use the FULL STRENGTH and not the quick.  The Quick has 75 percent strength of the full.

If you are going to use JB it needs to set about 24-48 hours depends on temp.  You will need to clead the surfaces with a Stainless Steel Brush and Alcohol.

Do not trust your eye on the mixture, it is 50-50 to get the best strength, and if you have a heated space do it inside.

If you are going ti use a smaller bolt or even the correct one, I would WRAP the bolt in 2 layers of Teflon Tape.

I would use a Washer on both sides of the break so that you have additional strength..

The only issue that I see is that this particular area is prone to axial vibration.  As the motor rocks and the top bracket does wiggle, you can feel it.

You might try a welding shop to see if they could weld it in place.

They also make a product called Dura-alloy, or Duraluminum that allows you to use a propane torch to weld the pars together.


You will also need to rig up a brace so that the parts are kept together as the glue sets.