Posted: Fri Oct 28, 2011 10:15 am Post subject: Lug nuts for SS rims
I have been a moderate lurker of the forums, and this is obviously my first post. I've searched the forum a bit, and haven't found a clear answer to my problem. Most other issues I have search on here I have found with ease, but this one is giving me a little trouble.
I have a 2004 Impala that had the steel wheel on it, and I recently got SS Alloy rims to go on it. However, (stupid me) I did not realize that the steel wheel nuts weren't supposed to go on them. These are the nuts with the external thread for the plastic caps.
The reason I noticed is I recently took it to get an alignment (at the same place who put the wheels on), and they noticed that the holes on the wheels are getting shaved by the steel wheel nuts. They told me I had to get nuts that go would aluminum wheels, but didn't tell me exactly what I would need for the seat pattern.
My question is, what is the regular seat pattern that goes on the SS Impala rims (Bulge, Mag, etc.)? If possible, can anyone point me to a picture of the factory lug nuts on the SS Impala rims so I can get an idea of what I need to get. I do autocross events in my Impala, and the next event is this Sunday, so I am a bit pressed for time.
If you need pictures of the wheels or nuts I have, I can get them sometime tonight as my work hours are 8am-8pm CST. Also because of the work hours, I may be a little late to respond.
I thought they used the same lugs, My SS had those on it from the factory with the plastic covers. Later changed them out to a set of chrome ones because I kept losing the caps.
if Im not mistaken, they are M12x1.5 acorn style
That is what I thought, but apparently the ones used on the steel wheels are tearing up the holes on the aluminum ones. I noticed on GMpartsdirect, there are two different nuts, but no way of telling which is which.
I did happen to stop by AutoZone and grab some of these. (M12 x 1.5) I have used the nuts like those before on my 87 IROC, and they work fine. Will try them out tomorrow to see if they will do the trick.
So I bought some like Dominus had chrome bulge style. The regular nuts that came with the lock nut set at AutoZone (doorman) were too long except for the lock lug itself. So I have been running on 1 black lock nut and 4 chrome nuts on each wheel for almost 2 months now, and it seems to have not caused any issues with the wheels.
Looking at the nuts that were on the steel wheels, it looked like someone had shaved a nice sized ring into the angled pattern which was causing it to dig into the metal off the wheel. Each time those nuts came off, you could see metal shavings coming out, but with the newer nuts you don't see it.
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