Hi guys I am posting for a friend who has a evo4 .12 and on the weekend his engine just lost complete compression after only approx running 5 tanks through it at no time did it ever over heat and was running very rich as I witnessed on the track myself

, but on saturday it clearly had no pinch at all I could spin the flywheel allowing the piston to move freely through tdc anyone else had this happen could this simply be a manufactured fault as a piston and sleeve replacement is not only hard to find

but also expensive

any suggestions would be appreciated.
cheers