Engine Hanging Problem (bolt spacer)!

pilot28906 · #1 09-22-2018, 09:03 AM

We just started hanging the engine and the spacers that the bolts go through for the mount are too small. The -7 bolts will not go into the ID of the metal spacers. Do the spacers get reamed or do I have the wrong spacers? Any help would be appreciated.

Thanks,
John

Mel · #2 09-22-2018, 09:08 AM

Sounds like you have the wrong spacers. They should slip right through. They should not even be a tight fit.

pilot28906 · #3 09-22-2018, 09:29 AM

The spacer part number matches the drawing. The I.D. of the spacers are .4255". How large is the ID supposed to be?

jrs14855 · #4 09-22-2018, 04:23 PM

The generic id for the bushings would be around .447. AN7 bolt would be around .435/.436. AN bolts typically measure about .0015/.002 under the nominal size. Size of the spacer is not critical, only the length is important. You can make some spacers from 9/16" x .058 4130 tubing.

pilot28906 · #5 09-22-2018, 05:28 PM

I reamed the ID and they worked fine.