He thinks the HG is blown. Very convenient for him, isn't it? Blown HG means I can't tell if your valves are leaking or the HG is blown.

Does the cylinder hold pressure? IOW are the rings shot or does the piston have a hole in it?

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow