[88andyb88]

..Nearly finished installing new disks and mintex extreme pads for my fabia vrs.

Was re-assembling the last brake calliper -> mounting bolts to hub/bearing housing - getting late in the day set my torque wrench to 125Nm ..I thought!

..ended up threading one of the mounts on the hub/bearing assembly:eek:

Seems I set it to lbf fts on the alternative scale. What a stupid mistake!

Been quoted £200 @ D M Keith, Leeds (for my mistake - front DS bearing/hub assembly)

need an annual service too - £146

does that sound reasonable? are there any good independent vag/skoda specialists in Leeds- recommended?

[Kandy]

You might be able to recut/repair it 'heli-coil'?

Ask the garage?

[Decron]

You don't need a new hub.

You need something called a Recoil (Or Helicoil)

You drill the hub out to a certain diameter, tap with a special size tap and then fit a little spring type effort which will replace the original thread. Tidy it up with a grinder to finish

Helicoil is the way forward, infact the thread will be stronger than the original.

I know the bolt securing the caliper to the hub are M12x1.5, The kit with the drill bit is about £40. The new bolts are about £2 from the dealer.

BTW a repaired hub looks like this

It takes about 20 mins to fit a Helicoil. Well worth the £40! All this comes in a nice little kit and this is the kit you want;

[Kandy]

That's the baby!

[Tom_vRS]

Yep, no need for a new hub, helicoil and it'll be as good as new.

Even cheaper would be to tap it out to the next size and fit a bigger bolt.

[Decron]

Even cheaper would be to tap it out to the next size and fit a bigger bolt.

:thumbdwn: DO NOT do this:thumbdwn:

You will weaken the hub and it's not in a place that will easily shrug that off.

[Tom_vRS]

:thumbdwn: DO NOT do this:thumbdwn:

You will weaken the hub and it's not in a place that will easily shrug that off.

Its also not desireable in that it will be very difficult to tap, you'll have to source the correct bolt. But in a different location (for say an M6 screw or similar) its a viable alternative.

[teedeeye]

:thumbdwn: DO NOT do this:thumbdwn:

You will weaken the hub and it's not in a place that will easily shrug that off.

Erm, doesn't fitting a helicoil involve tapping out to the next size anyway? :confused:

[Decron]

Erm, doesn't fitting a helicoil involve tapping out to the next size anyway? :confused:

Yeah, but you are adding to the thread with the helicoil, which makes it much stronger. It's too close to the edge of the hub to get away with a viable retap especially as the hub is very soft stuff. It's not a component I would like to fail...

[88andyb88]

Thanks for the great info!

Will try to see if I can get a kit - did not expect a fix!

Finding it hard to locate one in leeds area via the web.

Any chains that may have it in stock? ..where should I go?

[Wardy]

It would appear a store called FWB stocks it:

RECOIL RANGE THREAD REPAIR KITS (HELICOIL EQUIVALENT) from FWB Products

They also have a store in Keighley, but not sure exactly which bit of West Yorkshire you're in? FWB Tools - Branch Finder

Steve

[Decron]

I found this;

Recoil Insert Kit (5) Metric Medium 12.0-1.50 :: 37120 :: RCL37120 :: Recoil Thread Repair Tools

But thats bloody expensive!

Try this;

Recoil Thread Kit Metric Fine - Lawson HIS - UK

That's a good price! BTW you will need a 12.25-5mm (or 31/64) drill bit to do the job as well as this but these are only a few pounds. I got mine from a local tool supplier, you might just want to get your Yellow pages out and make some calls.

[88andyb88]

..update - thanks for all your help guys! ..owe you a beer or two.

Seems my workplace has a mechanical maintenance dept. They had a whole load of Helicoil kits. They did not have 12 X 1.5, but did have 12 x 1.75. As I had no time or transport had to go with this. they also supplied hi-tensile bolts. Job was not too bad. It all fits back well and tight. Been out for a drive and a good braking - feels good - bolts tight after. See my pics of the job attached.

Two questions though (if I may):

1. My tapping was not completely straight - but very near. When tight the bolt head seems to lay flat, but before tightening one side of the bolt head touches first on the way in. Is this a problem?

2. The thread pitch is dif. from manufacturers original. Thread is slightly deeper but 2 less threads.

Adv. so far seems to be should be fine - anyone know diff? ..just like to be informed.

Andy

[Decron]

Thats a coarse thread, over that length it might not be as strong as a finer one but it doubt there is much in it, dont see a problem with that except with the bolts. The OEM bolts have a "shakeproof" flange and a Loctite coating for obvious reasons

Whilst I hate Loctite (TBH it causes more trouble than good) if you can't fit a shake proof washer to it, then a drop on the thread should give you piece of mind.

[Tom_vRS]

The difference between those pitches should be negligible tbh, you'll be just fine.

Agree though, a drop of loctite probably won't go amiss.

I take it a Freedom membership is now in order :P

Glad you got it sorted though fella.

[TeflonTom]

personally i would have just screwed a new bolt into the old thread then stuck a nut of the back

[Decron]

personally i would have just screwed a new bolt into the old thread then stuck a nut of the back

Would need to be a real thin nut. There aint a lot of room to play with before the bolt hits the disc

[Wardy]

I take it a Freedom membership is now in order:P

:iagree:

[88andyb88]

This is what I have gone for.. + bit of blue threadlock to be on the safe side.

I'll become a freedom member; thats for sure:thumbup: