The original '39- 48' engine used in CMPs had a Mushroom head onthe valve, used in conjunction with a C shaped reainer and split valve guides. The '49-53' engine used straight stm valves with a 1 piece valve guide and 2 collet retainers. Both types of valve assmebly are removed in the same way, and your engine may have had the later type of valve if it has been rebuilt in the past some time. To just remove the valve to clean it up and reface it, you will need to remove the Mushroom head valve and the split guides together, while the straight stem type you will just need to compress the spring to release the collets and slide the valve out to clean or replace it.
See this pic;
Last edited by Tony Smith; 31-03-07 at 00:51.
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31-03-07, 00:45
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