Snapped Injector thread

[EvanWatson]

Hi,

Had a problem with a leaking injector seal on my saab 9-3 1.9tid (120bhp).
I pulled the injector, replaced the seal and reinserted. However as I was tightening the injector clamp nut, it had sheared the thread. As a result the car is out of action as the injector cannot be secured.

Anyone have any experience on this?

Is the visible thread the steam of a bolt positioned inside the head?

Any advice would be appreciated.

Thanks.

[stevieturbo]

Extract broken part, and either replace or helicoil etc

[EvanWatson]

ok, is the thread simply a "stud" as such?

In that it screws into the head on one side, has a slight bulge and then another thread onto which the clamp nut secures?

[Pumaracing]

It's unlikely to be anything else.

[EvanWatson]

ok thanks.

hopefully i can get the grips on it and unscrew it out. Nightmare.

[stevieturbo]

EvanWatson said:

ok, is the thread simply a "stud" as such?

In that it screws into the head on one side, has a slight bulge and then another thread onto which the clamp nut secures?

You could see it, so surely you are in a better position to tell ?

So was it a bolt or a stud ? Really dont imagine it being anything special.

Even a picture of the damage would help

[EvanWatson]

stevieturbo said:

You could see it, so surely you are in a better position to tell ?

So was it a bolt or a stud ? Really dont imagine it being anything special.

Even a picture of the damage would help

Working away from home for a few days, can't get a picture.

Hope they are the equivalent of these:

http://www.ebay.co.uk/itm/Renault-master-injector-...

If so, then my stud has sheared about half way up, no thread above where the clamp fits, so to speak.

Hope it's a stud, would just screw out of the head and easily replaced. M10 thread on the visible thread, if the grips don't work I'll put a couple of nuts on and try to remove by undoing the bottom one.

Edited by EvanWatson on Thursday 19th September 20:50

[stevieturbo]

Stud or bolt makes no difference.

How did it break in the first place though ? On removal attempt, or refitting attempt ?

Before you do try and remove it, give it a good soaking at least overnight in penetrating fluid, WD40 or similar.

[EvanWatson]

stevieturbo said:

Stud or bolt makes no difference.

How did it break in the first place though ? On removal attempt, or refitting attempt ?

Before you do try and remove it, give it a good soaking at least overnight in penetrating fluid, WD40 or similar.

Over torqued on refitting

Yes, I'll WD40 on Saturday and attempt on Sunday evening.

[Pumaracing]

stevieturbo said:

How did it break in the first place though ? On removal attempt, or refitting attempt ?

Is this not a sufficient clue?

"However as I was tightening the injector clamp nut, it had sheared the thread."

[EvanWatson]

Pumaracing said:

Is this not a sufficient clue?

"However as I was tightening the injector clamp nut, it had sheared the thread."

He clearly misread the post, hardly the first person to do such a thing!

[sassanach0]

wd40 is crap as a penetrating fluid,try plusgas

[stevieturbo]

Pumaracing said:

Is this not a sufficient clue?

"However as I was tightening the injector clamp nut, it had sheared the thread."

You assume I actually bother to read everything

[Pumaracing]

stevieturbo said:

You assume I actually bother to read everything

Lord no. You generally ask something that's already been said in the first post so I never assume that

I'd pretty much decided you must be pissed most of the time but I'd never hold that against anybody. Quite a fan of it myself.