Blown Head Gasket Impact on Valve Seats!

[LarryMaine]

On re-build of 172 sleeveless gas engine from a 1964 HD Industrial, the Head Gasket was blown between cylinders 2 & 3. These are some photos of the erosion and pitting of exhaust valves and seats due to burning water instead of gas. The seat on the left is intake, the one on the right is exhaust. I replaced all the valves, guides, springs, etc, had the valve seats all ground, and added some shims to the valve spring seats as was required. No questions here, just some info about what happens when one blows a head gasket. best to all, Larry.

 

[John P.]

Wow, that's sure some kind of ugly!