engine mount using bolt

[ducman]

I've just turned up some aluminium and PU engine mounts for my M20 20b. I thought I would just use a bolt instead of a double ended stud. Is there any reason this won't work?

[Teaguer]

It will work fine. It just transmits more NVH into the car but no worries there since you are already going with alum or poly .

Or you could always cobble up some steel engine mount arms and just weld them directly to the subframe. :D

[ducman]

It's for a E30 series race car. The rules don't allow full metal mounts :)

[7pilot]

Are you allowed to weld in subframe reinforcements for the engine mounts?
Prevents the mount fasteners from cracking the subframe or ripping a chunk out of it.

m

[ducman]

Are you allowed to weld in subframe reinforcements for the engine mounts?
Prevents the mount fasteners from cracking the subframe or ripping a chunk out of it.

m

No, I don't think so. Is that a common problem when using Polyurethane mounts?

[7pilot]

It is common in both E30 and E36 chassis.
My personal experience was with my E30M3 on factory mounts....The car they say has a torque deficit.:)

m

[browntown]

This pic is from akg, where they sell weld on reinforcements.