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i need to drill/tap out my b35 head for the m10 studs, Is this a drill press kind of job, or should I take it to a machinist? Also, what can be used to tap it? I just have a very simple tap/die set.

Its a bare head that's already seen the machine shop once, so it's nice and clean.

Have a machinist do the drilling and taping. If you screw it up, you will need a new head or lots of $$$ reapair work.

Do it right the first time.

I'm pretty sure there's an "adapter stud" type of thing that can be used. Fits the stock threads on one side but has the proper threads for the 745i manifold on the other.

Contact Todd at TCD, I think he used to sell them. He should at least be able to tell you where you can get them.

Failing that, Duke's right, you'll need a machine shop.

Jeremy

I want the real deal, for the extra support of the turbo. Even with a brace.

How much should this cost? My brother once had the head bolt holes drilled out on his VW diesel head, and i seem it was pretty cheap, but that didn't require tapping.

Oh also, if it's going to be there, do the timing covers need to be machined flush with the head like on m10s? My head's been planed, before I got it, and there's a difference.

bimmerboy wrote: Oh also, if it's going to be there, do the timing covers need to be machined flush with the head like on m10s? My head's been planed, before I got it, and there's a difference.

Yes.

Sorry, slightly O/T

Is there plenty of metal in a stock head for the thicker studs ?

I've got a thread gone on one of mine and i was going to drill it out slightly bigger so i could use a helicoil insert but i was worried about drilling a bigger hole ?

Why not just use ARP studs and not worry about modifying the head?

Edit: Are we talking about head studs or what?

booker wrote:Edit: Are we talking about head studs or what?

Talking manifold studs, stud.

Whoops, my bad.