HELP!  Does anyone know #'s on Y-Block, casting # ECZ 6015-C on side of block.  The 4 front main bearing caps have casting #ECZ 6329-A, rear main has casting # ECZ 6325-A.  This block was bored .030ths, decked .010ths and supposedly lined bored.  Why the difference in the main bearing cap #'s?  Thank you, Charlie, Central Fl.

Charlie:

The rear cap is shorter than the others, so it is a different casting.

John in Selma, IN

John - "The Hoosier Hurricane"

thank you John tried to P.M did not work

I just took a recently acquired 312 engine apart to have it hot tanked.  I put the main caps back on the block, and they didn't want to sit flush.  I tried to toe them in, but didn't sit flush.   Is this normal with the crank shaft out?  I tried them in their original positions. 

Paul J. - '57 E Code

If the block is good, the caps will be tight.  To prevent breaking a cap, it’s recommended to reinstall them with the main bolts in place and either lightly tap them down with a hammer or use the bolts to pull them down evenly.

Lorena, Texas (South of Waco)

Thanks Ted,

I guess that's a good sign then.  I was afraid to force them down.  I did start the bolts and evenly pull them down, but not all the way.  The machine shop said they would take care of that.  Now I just have to figure out how I want to build it.  I was going to put it in my 57, and then overhaul the 312 in it, but now I'm thinking about finding a nice 2 door sedan. 

Paul J. - '57 E Code