e30 m42 with e36 m3 mounts & idle vibration

[varg]

I have some solid UHMW mounts I got off a member for like $70. You want to feel a rattle, my car seems like it is going to shake apart when idling. I've been thinking of getting better mounts since the ones I have sit my engine a little higher anyway.

I sure hope you reinforced the crossmember, that sounds like a recipe for fatigue cracks.

[DER E30]

I sure hope you reinforced the crossmember, that sounds like a recipe for fatigue cracks.

Word. My m42 killed the crossmember on stock mounts somewhere near 170k miles lol

[mrmckie]

There's a hole in the side of my subframe.

The e28 mounts also raise the motor a little, correct?

[varg]

They were a little taller than my old sagging oem mounts, probably not much if any taller than new ones.

I'm worried about my crossmember. I see no cracks, but I have stiffer than stock mounts, a car with ~200,000mi on it, and the added stress of more than twice stock power output. I should probably drop it and weld plates in some day, it's just not an easy job to do in a driveway.

[roguetoaster]

There's a hole in the side of my subframe.

The e28 mounts also raise the motor a little, correct?

E28 mounts raise the engine slightly, but not enough to worry about. If it weren't for the constant abuse the track car takes it'd have stock mounts.

[DER E30]

They were a little taller than my old sagging oem mounts, probably not much if any taller than new ones.

I'm worried about my crossmember. I see no cracks, but I have stiffer than stock mounts, a car with ~200,000mi on it, and the added stress of more than twice stock power output. I should probably drop it and weld plates in some day, it's just not an easy job to do in a driveway.

Yeah, what a pain in the butt to do. I had a whole afternoon in taking the whole suspension out and like 2-3hrs in making my own plates and another 5-7 hrs putting it all back together. The steering linkage and ps hoses take forever The car was down a whole weekend, and I was out there working on it most of the weekend ugh.

[ccsdo5]

I sure hope you reinforced the crossmember, that sounds like a recipe for fatigue cracks.

Nope.



I have a spare cross member somewhere I plan to reinforce when I get the chance, but for now I just hope it holds.