Is this normal?

[Doug Rosewood]

So I was poking around under my 2016 2500 and noticed I have a bolt on the passenger side cross member(parrelel with the tcase) that's half backed out, it's not loose but the other ones flush with the crossmember

[calgator73]

Definitely take it in

 

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[O_J_Simpson]

No

[Doug Rosewood]

It's painted yellow on the threads like it is suppose to be like that? It's tight, I can't turn it and it looks like it fits into some sort torsion spring inside that cross beam..I'm having trouble posting pics, now I'm worried

[Doug Rosewood]

I think it's an adjustment screw for the torsion bars..but why are they so far apart adjustment wise?

[newdude]

I think it's an adjustment screw for the torsion bars..but why are they so far apart adjustment wise?

 

 

Correct. Those are the torsion bar adjuster bolts. The driver's side is usually turned in further than the passenger side to compensate for the weight of the fuel tank and driver which are on the left side of the truck. No need to take it in for anything.

[SMiller]

 

 

Correct. Those are the torsion bar adjuster bolts. The driver's side is usually turned in further than the passenger side to compensate for the weight of the fuel tank and driver which are on the left side of the truck. No need to take it in for anything.

Correct

 

 

If it takes a 22mm socket it is the torsion bar bolt.

[Doug Rosewood]

Thank you all for the help

[revrnd]

 

 

Correct. Those are the torsion bar adjuster bolts. The driver's side is usually turned in further than the passenger side to compensate for the weight of the fuel tank and driver which are on the left side of the truck. No need to take it in for anything.

 

For the GMT400 trucks there was a tooling fixture that the assemblers used to set the actual Z height depending on model & options. When we changed over to the GMT800, the fixture was no longer used. Anyone on the service side know if GM has specs & or directions for setting the Z height? I don't think it's something you just set by 'eyeballing' it.

[redwngr]

Z height is listed in the service manuals.

 

Torsion bar adjustment bolts are adjusted to achieve the correct 'Z' dimension, not to a certain bolt length.

[revrnd]

Z height is listed in the service manuals.

 

Torsion bar adjustment bolts are adjusted to achieve the correct 'Z' dimension, not to a certain bolt length.

Correct!

 

The fixture we used looked complicated. Spring loaded 'cups' held the fixture to the frame via the LCA attachment bolt heads on both sides of truck. A gauging finger on each side contacted the lowest edge of the spindle/knuckle casting. A pointer is connected to the finger & points to a scale. As the operator ran the bolt in or out, the finger/pointer moved indicating the Z height at the moment.