Stripped brake caliper thead - Pug 306

Today I replaced the front disc and pads on our Peugeot 306 1998 1.4l
petrol.

Everything was going well until I was doing up the last bolt holding the
caliper in place and it didn't tighten correctly - it stripped. Rather
than stripping the bolt, it stripped the threaded hole in the back of
the hub. Book (and Peugeot docs) say 110Nm, I was trying it at
100Nm, so wasn't going stupid.

Anyway, the bolt which stripped was different from the other 3. The
other 3 were only threaded half way, which fitted with the unthreaded
part of the caliper. This one was threaded all the way. I also noticed
(before stripping) that it wouldn't fit in the other hole, even though
the bolts looked the same size. I then swapped the bolts back to their
original position and this is when the problem occurred.

After stripping I noticed that the original type of bolt (50% threaded)
pushed straight into the hole, whereas this 'rogue' bolt needs to be
screwed in.

I'm suspecting that the last people who did the discs (major nation wide
chain who ripped us off with some overpriced work) stripped the thread,
replaced the bolt with a slightly larger diameter one (but not
noticeably different - I haven't measured them) and hoped for the best.

Anyway - whatever the cause - I have a stripped hole in my hub. Any
solutions?

I'm probably going to take it to a local garage tomorrow morning which
is about 1mile down the road and see what they can do. I've heard of
helicoils. but I'm a bit concerned about trying to do something myself
(eg. drilling out) in case I didn't get things square etc.

Any idea the sort of cost of a repair job like this? I'm really hoping
that it's going to be repairable, rather than a new hub etc.

Thanks

David

 

So the hub has to come off then? No chance of a garage doing it
in-place? Not done that before.... I guess I would need something to
compress the suspension coil etc.

I'm probably competent, just not experienced or equipped really. I'm
learning though!

I've not needed any engineering places before, so at the moment,
wouldn't know where to go. Also, we only have 1 car - so we're a bit
limited with getting to places until it's fixed (I'm not happy driving
around too far with it like it is - happy to drive it to a very local
garage - not happy to go over 30mph doing so. And besides, I can't
drive to the engineering place with the hub in the boot

The caliper will need drilling too if a larger bolt is used, I checked
that one.

If I had a second car, and therefore could leave it a few days and take
my time about it, and drive to places picking up the necessary tools etc
- then I'd probably do it myself - at least, give it a go.

I've been thinking about doing the head-gasket on this car too - but
without a 2nd car to get things when things go wrong (as I'm sure they
will!), I feel it might not be wise. Thing is though, getting a 2nd car
so I can DIY the car jobs seems to defeat the point of trying to save
money on the labour in the first place!

Thanks again,

David

 

Around £20-£30 tops at an engineering shop plus whatever hourly charge
the garage will want for taking it off.

Seeing as you appear at least half competent, strip the hub off
yourself and take it and the caliper to a local engineering place and
get them to redrill and tap the hole (may need to do the caliper as
well to ensure bolt will go through) and supply you with a new bolt to
fit.

Personally I'd drill it and tap it myself but I've got the tools. By
the time you've bought the tools to do what is a one off job, it's
cheaper to pay someone.

 

You can just take the strut off - that's what a garage will do. Trying
to retap a hole on a moving part with crap access in situ tends to go
wrong usually.

Try asking local motorist shops if they know companies that skim
cylinder heads. Those type of places will be suitably equipped.

LOL...

 

Try your local motorcycle shop first, they're far more used to helicoiling
things.