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Just noticed most guys torque lug nuts in the wrong order and it finally clicked why
I had a wheel come back with a warped rotor complaint a few weeks ago and spent way too long chasing it before realizing the problem was the install, not the parts. The guy before me had zipped all five lugs down tight on one side first, then worked his way around, and that pulled the rotor face out of flat. I started checking the torque pattern on every car that rolls in now, and I'd say 7 out of 10 have been done star pattern only as an afterthought, if at all. It matters because uneven clamp load is what eats rotors and gives you that pedal pulse at 60 mph that nobody wants to pay to fix twice. I keep a little laminated card taped inside my box with the pattern for 5 and 6 lug hubs, sounds dumb but it keeps me honest when I'm rushing. Anyway I've been snapping a chalk mark on one stud before and after so I can see if a wheel got spun on with a gun later. Curious if you guys see the same thing or if it's just the tire chain down the road from me doing it.
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umar597d ago
The star pattern matters but it's not really what saves the rotor, it's the two or three step torque sequence that gets you there. Zipping all five down on one side first is bad because of uneven clamp load, sure, but even a guy doing star pattern at full torque in one pass is asking for trouble. Go to half spec, then full, then check, and the rotor stays flat no matter which pattern you use.
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