Author Topic: C10 cylinder head  (Read 153 times)

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Offline dibnafan8

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C10 cylinder head
« on: February 24, 2019, 09:50:07 pm »
What year did cylinder head size change?

Offline Ginge

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Re: C10 cylinder head
« Reply #1 on: February 25, 2019, 06:04:55 am »
Well, they became alloy heads in 1949 I think.

Before then they're cast iron.

Two types of alloy heads were made.  One with splayed fins for part ( the later part?) of the C10L range and one with standard vertical fins for the other ( early? )  part of the C10L range and for late C10 after 1949.

The earlier cast iron heads date a long way back.  They were building C10's from 1938 to about 1953.  After that they were C10L's to use up the old side valve engines.

I don't know if the early cast iron head changed.  Someone older than me will know.  I wasn't there at the time.

It's not a C12 350cc sidevalve head ( 1940 ?) is it?


Offline timsdad

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Re: C10 cylinder head
« Reply #2 on: February 25, 2019, 07:11:45 am »
No, it's not a C12 head. The 350 is much bigger, with the studs spaced further apart round the larger bore, and the finning is noticeably different.

Just a motorcyclist.