I'm trying to figure out the root cause of why i have marks in my cyl 2 piston. Clearly the intake valve have met the piston.

I bought the car a year ago. It has been sitting in a barn for 20 years. It has been driven less than 10 km by me due to different reasons. There was a valve "tick" on one cylinder when i bought it. Thougt it needed vave adjustment. I changed timing belt + tensioner and adjusted the valve clearance. Camshaft/crankshaft alignment was correct both before and after the belt was replaced. Inspected Camshaft and rockers, Couldn't find anything abnormal.
Due to a oil leak from the head gasket i removed the cylinder head and found this.
I have turned the crankshaft back with one finger on the piston, can't feel any play there. I have also turned the camshaft, the valve closes as it should.
Someone got any ideas?
I bought the car a year ago. It has been sitting in a barn for 20 years. It has been driven less than 10 km by me due to different reasons. There was a valve "tick" on one cylinder when i bought it. Thougt it needed vave adjustment. I changed timing belt + tensioner and adjusted the valve clearance. Camshaft/crankshaft alignment was correct both before and after the belt was replaced. Inspected Camshaft and rockers, Couldn't find anything abnormal.
Due to a oil leak from the head gasket i removed the cylinder head and found this.
I have turned the crankshaft back with one finger on the piston, can't feel any play there. I have also turned the camshaft, the valve closes as it should.
Someone got any ideas?
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