Broken Bolt Which Attaches Rotor Cap to Dizzy

prelude_h22 · Post by **prelude_h22** » Mon Mar 07, 2016 8:01 pm

Hi All,

Just a quick question, one of the bolts heads which holds the dizzy cap on sheared off last weekend whilst doing some general maintenance. Needless to say i was quite annoyed.

The cap is still held securely by the other two bolts so the car can still be used if required.

Is the broken bolt easy to drill out with a standard drill?
Would it need re tapping?
Dont really want to buy a new dizzy -lol

Cheers guys

GJMHONDA2012 · Post by **GJMHONDA2012** » Mon Mar 07, 2016 8:22 pm

If you take off the other good bolts holding dizzy on then I'm sure it would slide off the over the sheared bolt then u could just use a set of vice grips or something similar and remove the rest of the bolt, these bolts shouldn't be overly tight I would imagine as its only for holding the dizzy cap on I don't think it would need drilled out, is it just the bolt head that's sheared off???

prelude_h22 · Post by **prelude_h22** » Mon Mar 07, 2016 8:28 pm

Unfortunately when the bolt sheared it seemed that the rest of the bolt sheared inside the thread, so wont be reachable or grip able with a set of clamps.

I see what you mean, the bolts are aluminium so quite soft. Drilling out should be possible?
I would assume i would need to retap?

GJMHONDA2012 · Post by **GJMHONDA2012** » Mon Mar 07, 2016 8:42 pm

prelude_h22 wrote:Unfortunately when the bolt sheared it seemed that the rest of the bolt sheared inside the thread, so wont be reachable or grip able with a set of clamps.

I see what you mean, the bolts are aluminium so quite soft. Drilling out should be possible?
I would assume i would need to retap?

Ah ryt ok fair enough I'm pretty sure it would be quite easy to drill out

prelude_h22 · Post by **prelude_h22** » Mon Mar 07, 2016 9:09 pm

Thanks GJMHONDA2012
Will try give it ago this weekend

mercutio · Post by **mercutio** » Mon Mar 07, 2016 9:24 pm

just use a very fine drill and take it easy the work up to the next size up you may even be able to bring it out with the drill

prelude_h22 · Post by **prelude_h22** » Mon Mar 07, 2016 9:27 pm

Thanks for the advice mercutio.
Hope theres enough room there for my bosch drill

mercutio · Post by **mercutio** » Mon Mar 07, 2016 9:27 pm

its only the bit that has to go in there

prelude_h22 · Post by **prelude_h22** » Mon Mar 07, 2016 9:33 pm

its only the bit that has to go in there

LOL. i mean the drill body on its side
I think the battery may need to be removed i think

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Tue Mar 08, 2016 12:12 am

prelude_h22 wrote:
its only the bit that has to go in there
LOL. i mean the drill body on its side
I think the battery may need to be removed i think

Or mark the distributor position, unbolt and remove it from the engine so you can work on it on the bench - that will be the safest option imo.

Are you sure the bolts are ally? I'd expect them to be steel, into the ally distributor body...