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decided car is not worth spending loads of cash on ( which as a pensioner I dont have anyway)  so have stripped off  cylinder head and started checking  damage to bores . slight scuffing all bores mainly around top ends and assume possible carbon ? had got onto top ring section when head gasket blew . thus running with  it may well have caused scuffing on bores . copying idea honing and new rings as rebore and new pistons is out of question.  also  looking at PCV valve renewing as though on removal it seemed Ok might well be a major factor in high blow by at idle and running .