Off with its head
Posted: Sat May 29, 2021 12:14 pm
I've run into some trouble with the cylinder head on my series 2. I can get hold of a 948 head but will a 948 head fit the 803 block?
Many thanks
Many thanks
Morris Minor Owners Club
Promoting the Preservation and Use of the Postwar Morris Minor
https://board.mmoc.org.uk/
Off with its head
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Re: Off with its head
Posted: Sat May 29, 2021 12:29 pm
Happy to be corrected, but I say 'yes'.....I think the 948 and 803 heads are pretty much the same.
Re: Off with its head
Posted: Sat May 29, 2021 1:01 pm
The 803cc and 948cc cylinder heads are of the same specification.
They can have casting numbers - 2A628, 2A629 or 12A1456.
All the heads have a combustion chamber of 24.5cc.
They can have casting numbers - 2A628, 2A629 or 12A1456.
All the heads have a combustion chamber of 24.5cc.
Re: Off with its head
Posted: Sat May 29, 2021 1:23 pm
Brilliant thank you, I'll have the old machine up and running again soon! I'll keep you posted. 
Re: Off with its head
Posted: Sun May 30, 2021 11:05 am
Oh dear, what happened there?
Re: Off with its head
Posted: Sun May 30, 2021 5:16 pm
I'm assuming that the valve hasn't been shutting right and has burned the valve seat.
Re: Off with its head
Posted: Sun May 30, 2021 6:54 pm
Valve looked OK just the head unfortunately.
Re: Off with its head
Posted: Sat Jun 05, 2021 7:17 pm
New head fitted and all. Compression test shows only 5 psi difference so looking good. The replacement head has new valve guides so was able to use the later spring type valve stem oil seals. Thanks for the info guys.