Gjac wrote:
Some good information here. My Kohler is 25 years old, only 420 hrs on it. It is a flat head engine( no over head valves) and if you look at the web site you posted the crank shaft or cam shaft with gears are obsolete, so if that is the issue I am out of luck. I am still hoping that if both valves sticking(which is confusing to me) that soaking head with Chemtool will loosen them. The oil pump relief valve is something I had not even considered, but that would make sense if oil is not getting to the hyd lifters then I guess both intake and exhaust would stay closed and if both stay closed the no air comes into cylinder so no compression takes place. I still have a call into the Kohler rep, he has not been much help but if I ask a specific question he will research it for me. So I can aske about how to check this valve.
Yeah, looked like a lot of Kohlers parts are obsolete but, there may be some parts available through aftermarket brands like Stens.
Flat head does make some difference, no rockers, more a direct drive from cam to valve which simplifies things a bit but also still has the possibility of valve/lifter issue.
Doesn't take much valve hang to stop building compression.
