More Knackered Nuts
More Knackered Nuts
Author
Discussion

ocho

Original Poster:

712 posts

256 months

Tuesday 8th February 2005
quotequote all
I've just had the rather unpleasant experience of rear tyre puncture on the motorway that developed into a split tyre by the time I got to a standstill. As appears not to be uncommon, one of the nuts sheared off when trying to change the wheel. I understand that these Magnesium nuts aren't the best in the world being somewhat sensitive to being overtightened. Does anyone have any suggestions to prevent future repeats - do you have to use the magnesium ones or are there better alternatives?

P.S. Anyone know of a where I can get some new 19 inch rears that aren't going to cost me the earth???

Thanks
Jem

Melv

4,708 posts

284 months

Tuesday 8th February 2005
quotequote all
Ensure a torque wrench used when tightening, and certainly not an air gun!!

Mel

dilbert

7,741 posts

250 months

Thursday 10th February 2005
quotequote all
If you take your vehicle to a half decent garage you can ask them not to do the wheelnuts up too tight.

You need to be specific about the alloy nuts, because the settings that they use will be for steel ones. All of their air wrenches should be torque adjustable. Although you could ask them to tighten them up with a tommy bar/torque wrench.

They could be a bit shirty about H&S on the basis that your wheels might fall off, and then you could sue them. I always take the wheels off at home put them in the back of the Fiasco, and take them down to the garage separately.

The alloy nuts are a bit painfull, even if you you are carefull to do them up sensibly. If you use a steel socket it will injure the nuts to some extent, even at the correct torque. You can buy a "soft socket", with a hard plastic insert that helps to protect the nuts.

I'm not sure if you can get these from Porsche direct, but they are certainly available on the aftermarket.



>> Edited by dilbert on Thursday 10th February 04:07

ocho

Original Poster:

712 posts

256 months

Thursday 10th February 2005
quotequote all
Thanks for that, guys. Anyone know the correct torque settings?

Melv

4,708 posts

284 months

Thursday 10th February 2005
quotequote all
What's the car?

ocho

Original Poster:

712 posts

256 months

Thursday 10th February 2005
quotequote all
Good point. 993 Carrera 2 Cab, on 19 inch rims if that makes a difference. If so, then I also have the original 17 inch Cup 2's that I'll be using until I'm able to replace the rear tyres, so if there's a difference for different wheel sizes, then both would be appreciated.

Thanks
Jem

dilbert

7,741 posts

250 months

Thursday 10th February 2005
quotequote all
'Fraid I can't help you there. I doubt that there will be much difference on different wheel sizes.

I looked up mine, on much smaller wheels (16") and the manual said 94 ft/lb. That sounds a bit on the tight side to me. Then again I usually only torque critical things.

As it says in the manual, tight enough, is what the average person can exert through a standard wheelbrace!

meldrewlives

121 posts

271 months

Thursday 10th February 2005
quotequote all
Yep 94ft/lb for my 993 on 17" split rims.

Melv

4,708 posts

284 months

Thursday 10th February 2005
quotequote all
Just rang my guys at GT1, Chertsey (01932 569911)

95 lb/ft or 120 N.M.

Same for 964.

Rgds
Mel

ocho

Original Poster:

712 posts

256 months

Thursday 10th February 2005
quotequote all
What a decent bunch of chaps you are! Now I've just got to find some new rubber. www.mytyres.co.uk seem to be the best price-wise, any other suggestions given that I need to get the tyres shipped to Spain?

Thanks to all
Jem