Rebuilt this sleds top end just over a year ago, but the sled was only started after the rebuild and ran for a few minutes. The sled had been sitting for over a year and when I opened the hood, there was oil dripping out from between where the Y pipe meets the pipe. Pulled the pipe and the PTO side of the y pipe had lots of unburned oil in it. Pulled that off and oil slowly started coming out of the exhaust port. Pulled the cylinders and found the entire PTO side of the crankcase is filled with oil. Figured it slowly came through one of the check valves and over a years time it filled the case.
There is a check valve on the PTO side of the engine and 1 in the PTO side carb. I am able to push oil though both of these and a new spare check valve using a syringe. To me, it feels like the amount of pressure needed to open the valve for oil to come through is the same for all of them. Is there a full proof way to determine if a check valve is faulty or weak? Is there a certain amount of vacuum or pressure needed to make them open?
Sorry for the long post, but figured I should explain everything before asking the question. Can anyone help me with this? Thank you for your time..
There is a check valve on the PTO side of the engine and 1 in the PTO side carb. I am able to push oil though both of these and a new spare check valve using a syringe. To me, it feels like the amount of pressure needed to open the valve for oil to come through is the same for all of them. Is there a full proof way to determine if a check valve is faulty or weak? Is there a certain amount of vacuum or pressure needed to make them open?
Sorry for the long post, but figured I should explain everything before asking the question. Can anyone help me with this? Thank you for your time..