£200 mistake!!

88andyb88 · 05-11-2007, 22:42

..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

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 · 05-11-2007, 22:56

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

Decron · 05-11-2007, 22:56

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 · 05-11-2007, 22:59

That's the baby!

Tom_vRS · 05-11-2007, 23:13

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 · 05-11-2007, 23:21

Quote:

Originally Posted by Tom_vRS

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

DO NOT do this

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

Tom_vRS · 05-11-2007, 23:22

Quote:

Originally Posted by Decron

DO NOT do this

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 · 05-11-2007, 23:32

Quote:

Originally Posted by Decron

DO NOT do this

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?

Decron · 06-11-2007, 00:05

Quote:

Originally Posted by teedeeye

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

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 · 06-11-2007, 01:14

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 · 06-11-2007, 01:26

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 · 06-11-2007, 02:09

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 · 08-11-2007, 00:58

..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 · 08-11-2007, 03:29

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 · 08-11-2007, 07:36

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

Glad you got it sorted though fella.

TeflonTom · 08-11-2007, 09:28

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

Decron · 08-11-2007, 09:52

Quote:

Originally Posted by TeflonTom

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 · 08-11-2007, 10:06

Quote:

Originally Posted by Tom_vRS

I take it a Freedom membership is now in order

88andyb88 · 08-11-2007, 18:53

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

05-11-2007, 22:42	#1
88andyb88 Briskodian Join Date: Apr 2005 Location: West Yorkshire UK Posts: 50 Members Car: Black Fabia VRS 2005 Thanks: 2 Thanked 0 Times in 0 Posts	£200 mistake!! ..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 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? __________________ 2005 FurbyVRS BLACK MAGIC, PD160 intake, GREEN Cotton, DragonDigiBox , VRS wheel badges, rear window tint, cupholder, lights de-fried-egged GT150s, Phillips Rally 100w JOIN FREEDOM:

05-11-2007, 22:56	#2
Kandy Briskodian Join Date: Jul 2006 Location: Sussex Posts: 644 Members Car: 2003 MkI L&K PD130 OCTAVIA Thanks: 1 Thanked 27 Times in 22 Posts	Re: £200 mistake!! You might be able to recut/repair it 'heli-coil'? Ask the garage?

05-11-2007, 22:56	#3
Decron Eye Eye Join Date: Oct 2005 Location: Cwmbran - South Wales Posts: 3,660 Members Car: Vroomster Thanks: 73 Thanked 269 Times in 197 Posts	Re: £200 mistake!! 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;

05-11-2007, 22:59	#4
Kandy Briskodian Join Date: Jul 2006 Location: Sussex Posts: 644 Members Car: 2003 MkI L&K PD130 OCTAVIA Thanks: 1 Thanked 27 Times in 22 Posts	Re: £200 mistake!! That's the baby!

05-11-2007, 23:13	#5
Tom_vRS Briskodaholic Join Date: Dec 2004 Location: Fenland, Cambridgeshire Posts: 11,793 Members Car: '97R BMW 328i Saloon Thanks: 728 Thanked 451 Times in 328 Posts	Re: £200 mistake!! 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. __________________ 97/R BMW 328i in Boston Green.

06-11-2007, 01:14	#10
88andyb88 Briskodian Join Date: Apr 2005 Location: West Yorkshire UK Posts: 50 Members Car: Black Fabia VRS 2005 Thanks: 2 Thanked 0 Times in 0 Posts	Re: £200 mistake!! 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? __________________ 2005 FurbyVRS BLACK MAGIC, PD160 intake, GREEN Cotton, DragonDigiBox , VRS wheel badges, rear window tint, cupholder, lights de-fried-egged GT150s, Phillips Rally 100w JOIN FREEDOM:

06-11-2007, 01:26	#11
Wardy Broken :( Join Date: Oct 2004 Location: Around Manchester & Cheshire Posts: 11,874 Members Car: Skoda Fabia vRS Thanks: 473 Thanked 384 Times in 371 Posts	Re: £200 mistake!! 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 __________________ Wardy's Fabia vRS xenons : sunroof : cruise : OEM+ "Racing is life. Anything before or after is just waiting." - Steve McQueen "If in doubt, flat out." - Colin McRae

06-11-2007, 02:09	#12
Decron Eye Eye Join Date: Oct 2005 Location: Cwmbran - South Wales Posts: 3,660 Members Car: Vroomster Thanks: 73 Thanked 269 Times in 197 Posts	Re: £200 mistake!! 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.

08-11-2007, 03:29	#14
Decron Eye Eye Join Date: Oct 2005 Location: Cwmbran - South Wales Posts: 3,660 Members Car: Vroomster Thanks: 73 Thanked 269 Times in 197 Posts	Re: £200 mistake!! 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.

08-11-2007, 07:36	#15
Tom_vRS Briskodaholic Join Date: Dec 2004 Location: Fenland, Cambridgeshire Posts: 11,793 Members Car: '97R BMW 328i Saloon Thanks: 728 Thanked 451 Times in 328 Posts	Re: £200 mistake!! 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 Glad you got it sorted though fella. __________________ 97/R BMW 328i in Boston Green.

08-11-2007, 09:28	#16
TeflonTom Briskodiodion Join Date: May 2006 Location: Hayling Island, Hampshire Posts: 8,387 Members Car: Fabia 2.0/Felicia Thanks: 53 Thanked 250 Times in 221 Posts	Re: £200 mistake!! personally i would have just screwed a new bolt into the old thread then stuck a nut of the back

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