Sleeves in a C113 engine block

Posted by David Bean on July 15, 2003 at 09:42:45 from (208.15.63.194):

Hi all,

I've got two C113 engine blocks -- both have the same casting number, 251069R1. Block A had been previously rebuilt using a thinner walled sleeve for a 3 1/8" piston. Block B has the original 3" sleeves in it.

I bought a new 3 1/8" set of sleeves and pistons that my machine shop guy installed in Block A a while ago. He had to bore out the existing sleeves, but that wasn't a big problem. Everything fit just fine.

For reasons that I'm too embarrassed, ashamed, and generally feel *really* stupid about, Block A is no longer a good block. (I have an ugly first timer story about this project that I'll save for later...) So, enter Block B. I'm pulling all the parts I bought for Block A and putting them in Block B. My machine shop guy, though, has run into something interesting...

The tops of the sleeves appear to be the same outside diameter, which makes sense...both the original and the new, thinner sleeves are same from the outside top. But, as he's started to bore out the original sleeves on Block B, he's concerned that the outside diameter of the *bottom* of the existing sleeves is smaller than the outside diameter of the new sleeves. (The new sleeve OD at the bottom is 3.312 and, nearest we can tell, the OD of the existing sleeve at the bottom is 3.250.) If that's the case, and he needs to bore a larger hole for the new sleeves, what happens to the O-ring groove? We're worried that if the bottom diameters of the sleeves aren't the same, we'll have problems sealing the lower part of the sleeve.

Given that the block casting numbers are identical, I can't help but think that whatever we're running into here was what the previous owner of Block A ran into when he redid the block with the overbore kit.

I hope that makes some sense. Am I missing something obvious? (It happens a lot.)

Many thanks,

- David

'50 C (in many pieces)
'55 400D

Follow Ups:

• Re: Sleeves in a C113 engine block David Bean 08:12:34 07/16/03 (3)
  • Re: Re: Sleeves in a C113 engine block Stan(VA). 12:23:16 07/16/03 (2)
    • Re: Re: Re: Sleeves in a C113 engine block David Bean 15:56:53 07/17/03 (1)
      • Re: Re: Re: Re: Sleeves in a C113 engine block Stan(VA) 21:02:24 07/17/03 (0)
• Re: Sleeves in a C113 engine block + 19:03:53 07/15/03 (1)
  • Re: Re: Sleeves in a C113 engine block Stan(VA). 19:33:49 07/15/03 (0)
• Re: Sleeves in a C113 engine block Gary_N_WV 18:53:26 07/15/03 (0)
• Re: Sleeves in a C113 engine block Bill Hires 14:14:17 07/15/03 (4)
  • Re: Re: Sleeves in a C113 engine block Wrong 20:12:07 07/15/03 (3)
    • Re: Re: Re: Sleeves in a C113 engine block Bill Hires 05:25:16 07/16/03 (1)
      • Re: Re: Re: Re: Sleeves in a C113 engine block Stan(VA). 12:48:18 07/16/03 (0)
    • Re: Re: Re: Sleeves in a C113 engine block Stan(VA). 20:29:38 07/15/03 (0)
• Re: Sleeves in a C113 engine block Gary_N_WV 11:36:30 07/15/03 (0)

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