Main Bearings

Unknown

Hi fellas-

I need your help again.

I've got the crankcase prepped for my '28 and I'd like to get your

opinions about a few things.

I've posted some shots in an album on this site called "Main Bearings

for '28". Please refer to these for my questions.



First of all, am I correct in assuming that since these bearings/caps

are shimmed, I can interchange them from one engine to another? I may

want to do that on the thrust bearing, as you'll see below.



The first photo shows the two styles of lower mains I have - one 'case

vs. the other. Is one more correct, or better than the other? The

grooved one came out of the case I'll be using, as did the upper in

photo four.



The second photo shows that between the two cases, both have damage to

the lower thrusts. Neither have any high spots, so at least the left

one looks like it could work, but I was wondering if I could just use

one of the upper thrusts, as shown on the right. I tried to remove the

bearing from the middle cap in the photo, but it barely budged when

using a hammer and wood block. Am I missing something?



The third is for the end cap seal grooves. When I dismantled the first

crankcase, they had wood dowels jammed into them. Is that right? Could

I just use RTV after the caps are in place?



Soon I'll be ready to fit the crank and plasti-gage it. I just wanted

to get some guidance from someone who knows these things before I

screw something up!

Thanks for your help.

Sincerely,

Ted Amman