I took the engine out and removed the heads for a camshaft swap. What I found was this:
all intake valves hit the pistons. Looks like the valve reliefs were too small in diameter. I only checked exhaust valve clearance when assembling the engine, I guess I'll clay both intake and exhaust valves from now on.
I expect all intake valves to need replacement for sure. Also the valve seals (intake and exhaust) are leaking badly.
I guess that the rods could also be bent. What is the best way to check them for straightness?
I was hoping to get the cam installed and have the engine back in the car within the next two weekends. This just turned into a complete engine rebuild
Simon