Quote:
Originally Posted by Mike C
On a rebuild my guess would be the guide clearance was insufficient on the valves.
On an older engine, stuck valves happen usually because of excessive buildup on the valve stem of oil and then sitting for an extended period, or it can happen when running an engine on varnished gasoline and then shutting it down. The varnished gas may run, but it doesn’t all burn and then when it cools on valve stems it glues them open.
A bent valve can stick as well but that again is on the shop if that happened on a rebuild.
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I was thinking the same thing, but I don't know why it keeps doing it if they went through the heads twice. Maybe their guy that does the heads needs to find another job lol?