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Valve guide choice
#1
I have a block 
M 268616 which has had to replace the cracked 88xxx original

Should  I use either new plain guides or shouldered guides?
Or does it not matter?

Regards

Bill G
Based near the Scottish Border,
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#2
It is my understanding that you should fit the correct type for the block Bill. I presume you do not know what type were fitted originally?

If you can take a picture of the underside of the valve chest, to show where they fit, I can tell you which it had originally.
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#3
Edit - your new block certainly had straight followers originally.
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#4
Thanks for the information Ruairidh.

Straight ones came out, but the seats had recessess
That looked as if shouldered ones would also fit.
I have a set of straight ones that I’ll fit.

Busy making alloy wings!

Regards

Bill G
Based near the Scottish Border,
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