Body to chassis torque figures?

[TheGriffalo]

What torque should the body to chassis bolts be? Oh, and what thread are they as most of mine sheared off when I removed them

[/popeye]

ETA:

I'll probably use the seat belt anchorage figure of 25 - 30 lb/ft from the Griffith Pages if there isn't an official figure as these pass through the fibreglass.

Edited by TheGriffalo on Monday 28th January 10:47

[dnb]

The seatbelt bolts are imperial (If my memory is correct) and the chassis bolts are standard M10.

I used (often custom made!) large penny washers to protect the fibreglass and tightened until done.

There should be steel sleves to protect the fibreglass in the seatbelt bolts, so they shouldn't stress the body.

[TheGriffalo]

I *think* the seatbelts are 7/16 but I'm not sure... I'll run a couple of known size UNF nuts down them next time I'm in the garage. The mounts need a second tap running through them anyway just to be safe.

Standard M10 X 1.5 Zinc plate torque is 38.25 lb/ft according to my chart, I'd say that's bordering on too tight through fibreglass.