I have just had replacement guides and seats done on my cylinder head. I had got the shims spot on when I did them on the bench.
Using a standard copper Payen head Gasket I refitted the head today and after the head was torqued down I have had to change two shims on the inlet side and one shim on the exhaust to get the clearances correct.
I am expecting to have to redo them again after the engine has been run, retorqued the head, and things have bedded in.
'71 +2 S130/4
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