Kohler: PS-SV530-3222 Serial: 4508402463
I did a leak down on this and found a pretty substantial intake valve leak. I disassembled it and gave it a good valve lapping. Everything looked ok. Nothing bent, no real damage to the face.
I tested with some gas to see if it leaked while the head was off and there was no leakage. I reassembled and there's been no improvement. With 50lbs PSI in it's only holding 30 and all of it is coming out of the intake.
I'm puzzled. Something doesn't seem right. I have all the tension off of the rocker. Nothing looks cracked. The faces look good. No excessive play in the guide. Nothing seams bent.
Weak spring maybe? It seems ok but who knows?
I've seen valves that leaked slightly during a fluid test have less leak down than this.
Thank you.