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Discussion Starter #1
I've had a slight shake at highway speeds since I picked it up with 14 miles on it. I'm at about 265 now. Local Chevy dealer has a roadforce balance machine so I took it there. $72. One tire was off 1/4 ounce, so not much. Others were fine. He told me that the rear rotors have the hex bolt in place to lock them in. The front rotors do not have the hex bolt! Neither side. So they must have some sloppy QC checks. The alignment is off too, the steering wheel is not straight. So, when I go get my parts from the dealer that I'm ordering, I'll likely have them do an alignment and place those bolts in the rotors.

I traded in a hanger queen Jeep...I sure hope I did not get another.
 

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Hey Mudman,
Hope everything gets resolved and nothing serious. Is your compass pulling right or left? My steering wheel isn't perfectly straight (off by a fraction of a degree), but I really think it's more of a finish issue than alignment. Mine tracks pretty much straight as an arrow. And with the hex bolts, here's what I know. A lot of times they're only put on to hold the rotor in place during assembly. I haven't had my wheels off yet, so I don't know if the Compass has hub studs and lug nuts, or if the wheels are held on with lug BOLTS. If it has lug bolts, that hex bolt just helps to line the holes in the rotor with the hub, BUT structurally, they really aren't necessary. I've done a lot of brake jobs, and NONE of the rotors I've ever replaced even had that locking bolt. I'm not any kind of ASE certified mechanic or anything, so what I say isn't "Gospel" but IMO I wouldn't be too worried about them. Maybe this weekend I'll get my wheels off, and see if I have them on my front rotors (maybe left off during assembly on purpose)... Anyhow, just my 2 cents!! And hoping for the best for you! :)
 

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Just a bit of clarification. I'm not saying to ignore those issues, and by all means you should have them checked out, but just saying hopefully they turn out to be "non" issues!!!
 

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Discussion Starter #4
Hey Mudman,
Hope everything gets resolved and nothing serious. Is your compass pulling right or left? My steering wheel isn't perfectly straight (off by a fraction of a degree), but I really think it's more of a finish issue than alignment. Mine tracks pretty much straight as an arrow. And with the hex bolts, here's what I know. A lot of times they're only put on to hold the rotor in place during assembly. I haven't had my wheels off yet, so I don't know if the Compass has hub studs and lug nuts, or if the wheels are held on with lug BOLTS. If it has lug bolts, that hex bolt just helps to line the holes in the rotor with the hub, BUT structurally, they really aren't necessary. I've done a lot of brake jobs, and NONE of the rotors I've ever replaced even had that locking bolt. I'm not any kind of ASE certified mechanic or anything, so what I say isn't "Gospel" but IMO I wouldn't be too worried about them. Maybe this weekend I'll get my wheels off, and see if I have them on my front rotors (maybe left off during assembly on purpose)... Anyhow, just my 2 cents!! And hoping for the best for you! :)
No pulling to the L or R. Maybe it is just lazy workers? They are wheel bolts, just like on my KL. I even took one out the other day and compared it to the couple extra I had for my former KL. Exact same lug bolt. Good to know on the rotor bolts. Thanks.
 

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Jut for clarity, 'bolts' only have threads but 'studs' also have straight splines and can't turn in the wheel hub. Studs are much more common than bolts in this application.

Best Wheel Bolt and Stud Parts for Cars, Trucks & SUVs

Wheel 'nuts' (lug nuts) secure the wheel and rotor by creating clamping force as they are torqued down, more specifically, the studs or bolts stretch very slightly - torque measurement is an attempt to achieve the correct stretch.

How to Use a Torque Wrench - How to Tighten Lug Nuts
 
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