Wheel nut torque
Wheel nut torque
05 March 2004, 10:43 PM
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I'm a bit of an obsessive on the wheels/tyres/brakes front, and check my nuts regularly 
Car is UK00.
I believe Subaru recommend 67lbs/ft, but anything more than 65-70 will stretch the standard chrome-dome-head nuts and begin to strip the thread. I also smear the bevelled mounting face between wheel and nut with a tiny amount of grease, otherwise the torque setting is meaningless.
I've just checked my nuts now (the missus said it was too early for her
) and after at least one month since the last check, they're spot on. And all present and correct.
85 is too high and if the nuts begin to degrade and bits of metal start to grind away at the studs, obviously the thread's integrity is compromised. Could be a problem for people who do track days and change wheels a lot. Where did you get that figure from, Puff?
Richard.
PS Edited to add, I'm talking about the standard nuts on UK99-00 cars, which I believe are the weak point. On my spare track day wheels, I fit nuts with a much longer thread on an extnded shank (is that the right term?). They can take more torque, but will not fit with OEM or Prodrive wheels with a tight fitting steel insert.
PPS While I'm waffling on, take care to check the torque on track days. As the wheels get hot (and they can get very hot) they expand and need tightening up during the day. Then they need slackening off as they cool before the drive home.
Car is UK00.I believe Subaru recommend 67lbs/ft, but anything more than 65-70 will stretch the standard chrome-dome-head nuts and begin to strip the thread. I also smear the bevelled mounting face between wheel and nut with a tiny amount of grease, otherwise the torque setting is meaningless.
I've just checked my nuts now (the missus said it was too early for her
) and after at least one month since the last check, they're spot on. And all present and correct.85 is too high and if the nuts begin to degrade and bits of metal start to grind away at the studs, obviously the thread's integrity is compromised. Could be a problem for people who do track days and change wheels a lot. Where did you get that figure from, Puff?
Richard.
PS Edited to add, I'm talking about the standard nuts on UK99-00 cars, which I believe are the weak point. On my spare track day wheels, I fit nuts with a much longer thread on an extnded shank (is that the right term?). They can take more torque, but will not fit with OEM or Prodrive wheels with a tight fitting steel insert.
PPS While I'm waffling on, take care to check the torque on track days. As the wheels get hot (and they can get very hot) they expand and need tightening up during the day. Then they need slackening off as they cool before the drive home.
Last edited by Hoppy; 05 March 2004 at 10:58 PM.
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