Hi List.......I have to agree with Geo that 200-205 psi sounds very high.
While the rule of thumb says that the readings should all be within 10-15 psi
of each other, a reading that high sounds unusually high. Geo has it right
when he describes and name the condition as hydrostatic lock. That would
account for the engine won't budge syndrome. If the compression readings were
obtained before the current catastrophic event, it is entirely possible that
coolant has entered the combustion chamber and caused the aforementioned
problem. Easy to diagnose. Pull the plugs and see if it spins; if it is
hydrostatically locked, removing the plugs will release the lock and the
engine will turn.
Jim McArthur
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