Rusted as if they were welded to the cylinder, but at first I had wery low expectations regarding the Spark Plug and Valve Cap too.
Maybe this will solve it self after the cooling fins have been welded. Either by the heat from the welding or when the cylinder cracks when cooling after welding.
Intake
Tried with an adjustable spanner but did not dare, in fear of ruining the nut. After more soaking in citric acid it looks like the thread is left handed.
Anyway, the thead has been soaking in penetrating oil while I have been loking for a ring spanner with the appropriate dimension. Measured with a cheap vernier caliper it measures about 32.5mm. Have not been able to find such a spanner. The closest I have found is BSF 7/8 or BSW 3/4. That would be 1.300“ or 33.02mm which it could have been before all the corrosion started.
I think I'll try a 32mm ring spanner and with some luck that will fit. Buying a imperial size spanner is the last option. I might even grind / open up a metric open end spanner before that.
Exhaust
This one is a real challange. Maybe I'll try to cut the nut to get it off. Both because the required spanner and the condition it is in.
Think I might have to make a new nut anyway... maybe from broze or brass?
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