I have a lot of build up on the exhaust valve on number 4 cylinder. Should I worry about this? I don't really have the money to rebuild the entire head, but I could replace the exhaust valves.

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When I removed the piston it was cracked in 3 places and basically fell out of the cylinder. So I assume it had oil pouring into the cylinder. The block and cylinders were surprisingly in fairly good shape, I dropped it off to be honed and new pistons and rings installed.

Any advice is appreciated,

Ryan

1984 Mitsubishi Montero, 2.6l - 5 speed