I need info on motor mount...

[rogus]

...bolt size for the oem frame attached (clam shell?) motor mount on a 81 Elky w/305 sbc. I hope someone can help me here I have been trying to look it up but keep coming up empty.

 

[melloelky]

...bolt size for the oem frame attached (clam shell?) motor mount on a 81 Elky w/305 sbc. I hope someone can help me here I have been trying to look it up but keep coming up empty.

bolt size for the frame attached mount to the frame or the clam shell that attaches to the block,or the bolt that joins the two halves together?you refrenced the frame and clam shell so i wanted to clarfy.

 

[rogus]

sorry for the confusion but I wasn't sure of the correct nomenclature. I am looking for the info for the mount that is bolted to the frame.

 

[melloelky]

they're 3/8"dia by 1" length.

 

[rogus]

3/8-16x1 correct? I know the mounts connected to the block are 3/8-16 as well. I tried removing one frame mount bolt from my Elky today and could not fit a 9/16 wrench over the head i had to us a 15mm wrench. I was wondering if these bolts had been swapped out by GM at the factory because I have other metric bolts on this car as well. I appreiciate the info.

 

[melloelky]

no you're correct.everything on the chassis's is metric.i changed mine out with a standard grade 8 during the mount swap via ocd hang up.if your stock hardware is in good shape there's no reason to replace it.

 

[rogus]

Well I'm planning on pulling the engine soon and i always like to replace all nuts and bolts as sort of cheap insurance.

 

[rogus]

I'm guessing than that these will be m10-1.5x25mm (or 30mm)