<VV> Differences bwtween 1964 and late cylinders

[Sethracer at aol.com]

In a message dated 7/1/2009 3:59:33 PM Pacific Daylight Time,  
tirediron at charter.net writes:

If has  been since learned that the case was from a 1967 PG 110 rather than 
 a
1964.  In reviewing the Clark catalog it appears that 1964 pistons  are
unique to that year.  Cranks, cams, rods, pistons, bearings fit  1960-1969.
Can anyone tell me what is unique about 1964 barrels and what  are the 
likely
consequences of their being assembled in a late case (with  140 heads)?

Bill
 



Bill  - only the 64 Cylinders are unique. In 1964, they stroked  the motor 
and needed more clearance around the botttom, so the slot was cut on  the 
side (and on the case) to allow the clearance. The bore of the Corvair  was 
the same from 1961-69. So the bottom of the 64 cylinder is the same as the  
65-69. The outside diameter of the upper gasket surface in 1964 was  uncharged 
from the 1961-63 models, so all 61-64 are the same (the 1960 model  used a 
slightly smaller bore and the head gasket surface might be a little  
different. In 1965, they increased the outside diameter of the upper end of the  
cylinder to present a larger sealing surface into the head. I have seen 
earlier  cylinders with a ring pressed onto them to reach a tight fit into the 
65-69  head size, but I would not recommend it. It really wouldn't present much 
more of  a surface for the gasket, it would just help to center the 
cylinder in the head.  


Seth  Emerson

C's the Day! - Corvair, Camaro, Corvette



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