I am in the middle of a complete rebuild of the 212 in my 1946 Super Six and determined the number 6 cylinder had been previously bored .060 over. The other 5 cylinders are standard bore. I am boring the cylinders .020 over and would like have #6 at .020 also. Has anyone sleeved a 212? Since the amount of metal between the cylinders on these 212’s is minimal to begin with, how thin can the sleeve be as to minimize the amount of metal that must be removed? How far can a person safely bore the cylinder to accept a sleeve?
The other true mechanics will chime in here, but I think you're past the limit.
Talk to a good machine shop. If your other cylinders are only .020 over, I think you could sleeve #6 OK. Years ago, when sleeving was more common, it wasn't unusual for a Hudson or Terraplane "splasher" to have one or more cylinders sleeved, in spite of the close spacing of the cylinders.
Thank you, a sleeve was ordered and will be installed as soon as it arrives.
[quote="Park Waldrop" post=7708]Talk to a good machine shop. If your other cylinders are only .020 over, I think you could sleeve #6 OK. Years ago, when sleeving was more common, it wasn't unusual for a Hudson or Terraplane "splasher" to have one or more cylinders sleeved, in spite of the close spacing of the cylinders.
AS Park mentioned here. If the sleeve was installed correctly previously, you can get away with a new sleeve. Remove the replacement ,install a new one, BUT if trying to sleeve all cylinders or even 2 paired together-find a new block. I guess it can be done, but it is way too much work for it NOT to work! Make sure that they glue it in at the bottom. Also, since these have such a long stroke and the #4 ring comes .250 from the bottom of the bore, have the machine shop pay close attention to where they create the sleeve seat. Hope this helps.
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