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Cayman Wheel Bolts


garytipping

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Hi All,

 

The wheel bolts on my car are rusty, so I thought I would paint them.

 

Having taken them out I find the domed 'washers' are breaking up. Is this caused by corrosion or over tightening or both?

 

Any recommendation on replacements, and where from?

 

Regards

 

Gary

 

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mine were the same, caused by galvanic corrosion. be careful when you order new ones, you need radius seat washers not taper seat washers, very similar to look at especially with on line pics. I put hubcentric spacers on mine that came with extended bolts with radius seat washers.

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Did you call Design911 and check, or go by the photos? I ask as a Porsche battery they illustrated was not the one actually in stock when they checked their stock.

 

Anyway, you'll know soon enough when they arrive and you can check against the old ones.

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Just a bit of help. When you re torque the new bolts, you’re meant to use aluminium paste. It’s a devil to find, I think design911 sell it. Made by castrol. My local OpC kindly gave me some free in a bag from their workshop.

 

Some people use copper grease but you really shouldn’t use that, it has different properties of friction etc. You put the grease on the thread and between the washer and bolt head. It tells you how in the owners manual.

 

Stops corrosion and also validates the torque setting for the wheel bolts.

Edited by Buggyjam
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Also as an aside I now re paste and retorque the bolts if they’ve ever come off anywhere other than the OPC. After it had been into a specialist in England, one wheel bolt came loose and fell out and after it had been into a bodyshop one wheel bolt was tightened to something silly north of 150nm. I suspect they’d just used a breaker bar to tighten. Porsche discovered that when they were fitting up for a replacement locking wheel nut the bodyshop lost :D. When I took the bolts out I discovered they’d not had grease for years and were starting to corrode so that’s why I sorted them out myself. Generic places not specialising in Porsche like bodyshops or tyre centres perhaps (not all of course) don’t bother checking the torque values relevant for the car and maybe just use “arm wrench”. It’s amazing really when you think these things hold the wheels on. Always worth checking yourself if someone has ever had the wheels off. 

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Buggyjam... I guess the torque figures are in the owner's manual, yes? If not, where do we find them?

 

I'll ask my OPC for a little pot of aluminium paste when the car goes in for its 40k service this Friday. 

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Ordered a tube of Castrol Optimoly from eBay £14.99 delivered. Thought I might get some from Trident racing or Fearnspeed at Silverstone but no luck. Great if you can get some from your OPC.

The torque figure in my manual is 130Nm

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11 hours ago, DJMC said:

Buggyjam... I guess the torque figures are in the owner's manual, yes? If not, where do we find them?

 

I'll ask my OPC for a little pot of aluminium paste when the car goes in for its 40k service this Friday. 

 

Thats it mate back of the manual somewhere

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