Subframe bolt torque & sizes

[Mark Halligan]

Hi,

can anyone tell me the correct torque settings for the front (12mm) and rear (10mm) subframe bolts?

Cheers,

Mark.

[s2avant]

I've only got info for the front setup (although as the bolts are the same the settings are probably the same for the rear)

M10 bolts 35Nm + further 90º

M12 bolts 70Nm + further 90º

HTH,

Ben

[Mark Halligan]

Thanks Ben.

[kninio]

what is the mean do u mean by + further 90º , and why the 5 cylenders audi some times have cracks in the body metal near the subframe bolts? is it possible do to rough driving?

[A1QSHIP]

what is the mean do u mean by + further 90º , and why the 5 cylenders audi some times have cracks in the body metal near the subframe bolts? is it possible do to rough driving?

Think of a clock face. After the bolts are torqued to the proper setting, turn the bolt from the 12:00 posistion to the 3:00 posistion. The cracks in the
metal near the subframe area is not good. It indicates that the metal in that area has been overstressed & needs to be repaired.

[kninio]

aha i understand the first one, and about the cracks what is the reasons for that? i had almost 5 audis and one 90 quattro have it so much badly that i sold it imeditly and another one 90 2.3 have just very small crack in the solder also in the same place.. what can cose that? the rough driving in bad roads?

[Fat Audi 80]

Am I right in thinking that these bolts conform to standard sizes? i.e. M10 will have a 17mm head and the M12 19mm head?

I need to confirm to Pete @ QC which size supaflex bush I need for my front subframe...

Thanks,

Steve.

[Error404]

you'll need a set for use with 12mm bolts

[Fat Audi 80]

I will let you know if you are correct later on tonight.

[Mikes2]

Quite often the replacement M10 bolts have a 18mm head just to cause confusion. M12 should be 19mm

[Fat Audi 80]

Mike, I love the way you lurk and then pop up with these insightful little titbits...

Thanks,

Steve.

[Fat Audi 80]

Quite often the replacement M10 bolts have a 18mm head just to cause confusion. M12 should be 19mm

Give that man a prize. 18mm Head for an M10 Bolt.

CORRECTION. I was a dunce when I measured the bolts. They are in fact M12 with an 18mm head.... New subframe bushes on the way.