19-10-2020, 01:05 PM
The standard Austin Seven engine doesn't rev high enough for long enough for valve seat recession to be a problem.
However the frequent decarbonising and valve grinding that was normal in the past does cause it. Modern valves and seats seldom if ever need regrinding.
However the frequent decarbonising and valve grinding that was normal in the past does cause it. Modern valves and seats seldom if ever need regrinding.
Jim