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bobbber · Posted: Mon May 18, 2009 10:36 am Post subject: Driveshafts

Hi chaps...

Pretty sure I have a problem with one of the CV joints on the nearside of the car.

I want to remove the driveshaft that side and then have a good look at it all on the bench. Any hints?

According to the manual all that's required is to remove the bolt on the hub and the 6 Allen bolts on the CV joint (gearbox end). Is this correct?

Also the hub bolt is done up to around 350ftlb... any ideas for achieving this? I plan to put a bar across two wheel bolts to keep it still... good idea?

Hints to buy a 1" drive torque wrench not acceptable Laughing

they're about £350.

Bob
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Fiat Bravo 165 Sport

Admin · Posted: Mon May 18, 2009 10:48 am Post subject: Re: Driveshafts

Oggie · Posted: Mon May 18, 2009 10:56 am Post subject:

What about an impact driver?.
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PHAT 33

bobbber · Posted: Mon May 18, 2009 11:01 am Post subject:

Impact driver? Blimey... you don't mean an impact wrench do you? I can't imagine smashing 350ftlb across my fingers... perhaps I'll invite you round Iain to do it for me!?! Laughing

Keith... I guess I could hang my 100lb mate from a 3'6" bar Laughing

good thinking that man!
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Fiat Bravo 165 Sport

JeremyC · Posted: Mon May 18, 2009 11:33 am Post subject:

Do you really have a friend who weights 7st 2lb?

In my experience numbers like that just mean "as tight as you can"!
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'93 Black 33 1.7 16v

bobbber · Posted: Mon May 18, 2009 12:14 pm Post subject:

lee16v · Posted: Mon May 18, 2009 2:11 pm Post subject:

Yeah, Using a long bar with a bit of scoffolding or similar to get leverage and as jeremy said, Chuffing tight.

Probably easiest to undo with wheel on ground and working through wheel centre. Not sure our brakes are up to stopping more than 20lbft pressure Rolling Eyes

bobbber · Posted: Mon May 18, 2009 2:31 pm Post subject:

Cool Lee... I did wonder if you could get at it through the wheel centre Very Happy

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Fiat Bravo 165 Sport

lee16v · Posted: Mon May 18, 2009 2:37 pm Post subject:

Socket should go through. If not wheel off, fit socket, wheel back on then use short extension and fit wrench. Bit of a faf but easiest way on your own Very Happy

bobbber · Posted: Mon May 18, 2009 3:15 pm Post subject:

Marvellous!

Going to see if I can get complete shaft for replacement rather than faffing about with UV joints and stuff.

Keep ya posted ...

Bob
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Fiat Bravo 165 Sport

gritsop · Posted: Mon May 18, 2009 3:37 pm Post subject:

Hi all,

Let me throw in some info regarding the driveshaft removal.

First of all you need a 6mm Hex nut to undo the nuts from the gearbox side CV joint; the hex nuts usually accumulate dirt so you have to either clean the inside of the hex nut using a slim screwdriver or make sure you gently press in the hex nut in order to expel dirt.

Regarding the axle nut: It is a 36mm nut that can be removed only if you have in hand a machined socket like the photo shows. Since the hub is conical a non machined socket will not fully grab the axle nut and it wont be long till you round the axle nut.

A good piece of advise to prevent the axle from turning is either applying the brakes or a better way is to wedge a screwdriver on the gap of the vented brake disk against the fixed caliper bracket.

I had used a regular lever to undo the axle nut which is used to remove the wheel bolts; it is around 70cm long and the axle nut was easily removed without any major difficulty. However on installation I used the torque wrench to fully tighten the axle nut to the specific setting; be sure to punch the axle nut on both sides in order to prevent it from unlocking.

As far as the CV joint is concerned then this is a hell of a dirt job. If I am not mistaken there are a couple of variations of the CV joint so in order to get a new one you need to have the old one as a sample.

Hope this helps.

Regards

EDIT: Here are the dimensions for the machined socket.

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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

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john 33_16v · Posted: Mon May 18, 2009 4:32 pm Post subject:

Hi,

Than is spot on about that 36mm socket needing machining.

I recently tightened up my hub with a new nut.

It was fackin tight, but i managed with a jack handle on the end of a 'strongarm' 1/2 inch dive. As i was on my own I wedged my stoplock between the brake pedal and seat front, which worked.

John
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If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue

bobbber · Posted: Mon May 18, 2009 5:00 pm Post subject:

Interesting.

So the smallest outside diameter needs to be 48mm?

36mm nut (A/F), I make that 18mm radius.

Therefore, external radius (A/C) = 18/cos30 = 20.8mm.

Therefore, external diameter (A/C) is 41.6mm.

That doesn't seem particularly thin? 48 - 41.6 = 6.4mm, which is 3.2mm socket wall each side of the points.

Perhaps that is thin on such a large socket! Laughing

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Fiat Bravo 165 Sport

john 33_16v · Posted: Mon May 18, 2009 7:18 pm Post subject:

Hi,

I started with a laser(i think) socket and ground back just a little around the top quarter or so. It wasn't a beautiful fit but did the job.

Probably not viable Bob, but i'd be happy to send it to you if you wanna pay postage, for you to give it me back at Auto Italia stanford hall in June if you're going.

John
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If it aint broke, fiddle with it until it is!
- - - - - - - - - - - - - -
93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue

eagle3 · Alfa 33 Joined: 11 Nov 2007 Posts: 402 Location: France

lee16v · Posted: Tue May 19, 2009 5:30 pm Post subject:

Have you sourced new ones yet?

Didn't know if this was any good?
http://www.carparts-direct.co.uk/drive_shafts_detail.cfm