Removing a broken screw from CPS mount

[MrWhite]

I have a slight problem with my M52 engine - the screw securing the crank position sensor (item 10) has lost its head during a previous attempt to remove it and the rest is still in the timing case.



Access from above to drill the remains of the screw out is very limited. What is involved in removing the timing case? Does the head need to come off first? Any other ideas for how to remove the broken screw would be appreciated.

[MrWhite]

Another clue:



This must've happened to somebody.

[heathy325]

If the heads snapped off then pull the sensor out and if there's enough stud sticking out then get it got with a blowtorch and use mole grips failing that it will have to be drilled and carefully re tapped

[MrWhite]

Thanks for the reply. There is my problem - the screw head has broken flush so mole grips are out. Hand drill is too big to get the bit in line with the hole. I think I'll need to have a go with the Dremmel. I want to avoid taking the timing cover off if I can.

I've not stood and looked at the engine for a while. Can anybody say if the timing case cover can be removed without having to disturb the head or the timing gear?

[heathy325]

If memory serves me right it's a pig to get the cover off there are a couple if retaining bolts under the rocker cover but don't think the head has I be removed, you can get angle drills that are verry slim I bet that would do the job

[Neilios]

weld a nut onto what you can see and it might turn out with some warming of the case.

[MrWhite]

Thanks for the replies. I'll have a better look at it this weekend.

[Brianmoooore]

Cable ties have their uses, and this might be one of them!

[MrWhite]

Cable ties have their uses, and this might be one of them!

To secure the sensor in place or to assist in the removal of the broken screw?

[Brianmoooore]

To keep the sensor in place. No one will know, except you (and the entire Zone.)

[MrWhite]

I don't think I'd be able to sleep at night! I'm surprised that such a suggestion came from you, Brian.

Surely a cable tie wouldn't really work without first drilling a hole in the mount, where the screw goes?