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The Ford Barn (https://www.fordbarn.com/forum/index.php)
-   Model A (1928-31) (https://www.fordbarn.com/forum/forumdisplay.php?f=3)
-   -   Rookie with an engine problem (https://www.fordbarn.com/forum/showthread.php?t=135256)

Tom Wesenberg 03-29-2014 06:17 PM
Re: Rookie with an engine problem
 

Here's a link to Herm's babbit pictures showing what the oil grooves and pockets should look like. I'd remove the main caps and file oil pockets in them as shown in Herm's pictures. See reply #9

https://www.fordbarn.com/forum/showth...+bearings+herm

James Rogers 03-29-2014 07:56 PM
Re: Rookie with an engine problem
 

Quote:
Originally Posted by Bob C (Post 850052)
Is that a piece of babbit missing near the front of that cap?:eek::(

Bob
It is a void in the pour and there is more than one.:eek:

Wallace 03-29-2014 08:21 PM
Re: Rookie with an engine problem
 

Shelby, This has been a really informative thread, and a good looking car...in an outstanding garage.

James Rogers 03-29-2014 09:16 PM
Re: Rookie with an engine problem
 

Quote:
Originally Posted by Shelby1962 (Post 850027)
Mr. Rogers...Thanks for the suggestions on the tinfoil and everyone else that replied. As you can see from the photos the engine maybe fresh but whoever did the babbit work should be banned from doing this kind of work! The clearance was .006 but the thrust was good at .004. Had a friend come over with Les Andrews book and he helped with the main clearance. It's now within spec. Put it all back together and ran it for 45 minutes and no leaks yet. Not sure how long it will live but it appears to be OK for now. Not the most confident on the engine but it sure is a pretty thing.
Glad I could help and, you are right, that is a shoddy looking job. Others are correct in that, there should be wells at the sides of the bearings. These wells should go from where the groove intersects the parting line to the same place on the other side and there should be one on each side. This, among other things, could have been what contributed to the clearance being wrong . Even if you only have one on each side of the cap it is better than none.

Kohnke Rebabbitting 03-29-2014 09:25 PM
Re: Rookie with an engine problem
 

Quote:
Originally Posted by Shelby1962 (Post 850027)
Mr. Rogers...Thanks for the suggestions on the tinfoil and everyone else that replied. As you can see from the photos the engine maybe fresh but whoever did the babbit work should be banned from doing this kind of work! The clearance was .006 but the thrust was good at .004. Had a friend come over with Les Andrews book and he helped with the main clearance. It's now within spec. Put it all back together and ran it for 45 minutes and no leaks yet. Not sure how long it will live but it appears to be OK for now. Not the most confident on the engine but it sure is a pretty thing.
I would guess that front flange will crack off at some point, as it looks to be just hanging out away from the cap serface. You can see the babbitt wasn't peened.

Oil will go through the mating surface of the cap and block with shims.

I always put a light coat of RTV on the shims, and both end's of the main bolt's.

If the RTV comes out past the part line"s more then you want, you have put on to much.

Oil will go through the shims, no matter what.


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