Cylinder heads after skimming and valve seat re-grind
Complex alloy weld after stud extraction.
Whole volume around old stud has been milled out, new alloy welded in place, and a steel thread inserted
Old damage to cylinder head
Either someone had been brutal in removing the head before, or a foreign particle had got into the combustion chamber (broken plug insulator for example) and been hammered into the head by the piston
Significant corrosion, compromising head gasket sealing
Head off, tool being removed
Head gasket in terrible state - ready to blow...
Removing the old head gasket
Head off. Badly corroded at top near top of cyl 3
The block - gasket is corroded away
Using head removal tool