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Author Topic: Drive shaft bolts  (Read 427 times)

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Offline Tim Watson

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Drive shaft bolts
« on: December 23, 2012, 10:34:21 am »
I have the solution and it only costs a packet of Jaffa cakes!

After a day at Curbourgh in August one of my drive shafts kindly decided to detach itself a few days later. Fortunately I was only doing about 10mph! I managed to retain all the bolts and Mr AA man put them back in so I could get home.

I have just done a lot of work to the car and while I was at it thought I'd do something about the drive shaft bolts.

I got a new set from VW and took them to a machinist at work armed with a packet of Jaffa cakes. He drilled a 1.2mm hole through the head of each one.

I then replaced all the bolts with my new ones, a dab of thread lock for good measure followed by a bit of wire locking. Some of my neatest ever, (I'm an aircraft technician) I do a lot of wire locking!

Now the bolts won't come undone and I have peace of mind.

Feel free to do this yourselves if you want to.

Keep an eye out for my JMR cylinder head fit thread soon.
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Offline Tim Watson

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Re: Drive shaft bolts
« Reply #1 on: December 23, 2012, 10:41:11 am »
Sorry for the poor picture quality but you get the idea.
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Offline Stooza

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Re: Drive shaft bolts
« Reply #2 on: December 24, 2012, 01:22:15 am »
Nice work Tim, can this be done for flywheel bolts?
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Offline Tim Watson

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Re: Drive shaft bolts
« Reply #3 on: December 24, 2012, 09:59:34 am »
Hi mate.

Unfortunately not, the bolts are too far apart and are recessed. You could do it for the pressure plate bolts.

I'm still racking my brains on how to fully secure those bloody fly wheel bolts. But I'm sure someone would have come up with a method by now.

Tim.
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Offline JMR

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Re: Drive shaft bolts
« Reply #4 on: December 24, 2012, 10:54:13 am »
Great idea Tim...never gave that a thought!

I've not seen an issue with c.v bolts myself but prevention is far better than cure...well done.

As for flywheel bolts...after an issue on a high power 16v I used an ARP bolt for a Ford Pinto...length adjusted...with a think H/D washer under the head (washers MUST be fitted if doing this due to the underhead profile of the Pinto bolt) and torqued 15ib higher than the std bolts (70ib/ft v's 55). So far so good on the big power engine, and I've just done the same thing on a 2ltr 8v road spec engine after finding evidence of the pressure plate fretting a little on the crank...it appears to be a 2ltr issue as I've never seen it on any of my 1800's to date.

To save chopping bolts there will be a JMR bolt kit coming in the new year for the pressure plate to crank fixing.
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Offline chrismc

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Re: Drive shaft bolts
« Reply #5 on: December 24, 2012, 11:12:00 am »
The flywheel bolts are a special case.

They don't work loose- but tend to bend/snap due to the shear loads applied to them through increased rpms/torque

On Tims car I had extra stainless steel dowels (x4) added to the flywheel that locate tightly into the pressure plate & (hopefully) transmit the radial/shear loads between the two.

This then leaves the x9 flywheel bolts to purely secure the flywheel to the pressure plate & only take tensile loads....

Time will tell if they hold out.....
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Offline RobT

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Re: Drive shaft bolts
« Reply #6 on: December 26, 2012, 06:11:03 pm »
Arp already make a flywheel to crank bolt set for 16v, 02a-type teansmission.

I bought a set from eurospec sport in usa a few years ago and not had an issue since. Fitted with an autospec ali flywheel that i precision drilled exactly to fit the arp bolt shanks.
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Offline GEL

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Re: Drive shaft bolts
« Reply #7 on: December 26, 2012, 07:03:51 pm »
Neat work Tim !

Never had an issue with drive shaft bolts on Mk1 & 2 Golf`s myself.

Flywheel bolts ... pp chrismc, those on my Mk2 16v using 7800 `went soft` after a few thousand miles, replaced with standard as I don`t believe there is an ARP or other direct replacement for the 020 kit.

EDIT: Was a 2ltr with a lightened flywheel
« Last Edit: December 28, 2012, 09:53:09 am by GEL »
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Offline JMR

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Re: Drive shaft bolts
« Reply #8 on: December 28, 2012, 12:43:17 am »
Much different to the 020 bolts Rob?

All my stuff has been 020 based to date due to the regs we run ours & customers cars too so I've yet to look into 02A/02J type transmissions yet...but it could be coming on a project in the not to distant future.

It appears to be mainly a 2ltr issue...I've seen it on high power/high rpm 2ltr 16v's and recently on a fast road type 2ltr 8v....never seen it on any of my 1800's to date.

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Offline RobT

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Re: Drive shaft bolts
« Reply #9 on: December 28, 2012, 08:38:54 am »
I think they are longer than 020 due to flywheel being a thicker piece, specs hete from 2006:

http://www.clubgti.com/showthread.php?109279-ARP-flywheel-bolts-UK-supplier-on-page-2

Mark Yates, now one of heads at Revo, ex-BRM ex-Minshaw golf touring car engine builder, told me that they used to have a lot of problems with 020 pressure plates cracking between the bolt holes,so used a secondary plate to help stop this. Ever seen this?
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Offline Tim Moll

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Re: Drive shaft bolts
« Reply #10 on: December 28, 2012, 04:02:45 pm »
Quote from: RobT on December 28, 2012, 08:38:54 am
I think they are longer than 020 due to flywheel being a thicker piece, specs hete from 2006:

http://www.clubgti.com/showthread.php?109279-ARP-flywheel-bolts-UK-supplier-on-page-2

Mark Yates, now one of heads at Revo, ex-BRM ex-Minshaw golf touring car engine builder, told me that they used to have a lot of problems with 020 pressure plates cracking between the bolt holes,so used a secondary plate to help stop this. Ever seen this?

I've heard of this happening as well and know that you can get 5mm spacers (i think that's what thickness they were anyway) that then from memory allow you to use the longer 02A bolts.  I'm pretty certain Mart (Hotgolf) has also machined some of these up for people in the past.

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Offline Tim Watson

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Re: Drive shaft bolts
« Reply #11 on: December 28, 2012, 07:26:12 pm »
Stop stealing all my jaffacake brought glory.

Interesting though.
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Offline Tim Moll

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Re: Drive shaft bolts
« Reply #12 on: December 28, 2012, 11:38:10 pm »
Quote from: Tim Watson on December 28, 2012, 07:26:12 pm
Stop stealing all my jaffacake brought glory.

Interesting though.

Jaffacake away Tim......last time I asked Mart he said he had no intention of making anymore!

In fact I'll pay a pack of Jaffa cakes for one as well  :D

Tim
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