- Joined
- Nov 26, 2009
- Messages
- 3,080
A couple people contacted me recently with blown motors and sad tales about oil line shut off valves (a terrible idea).
The only real problem with wet sumping I've heard of is blowing out a main crank seal. Too much oil in the sump is going to lube the cam and the journals. Too much oil in the timing chest is going to cover the oil pump and give you a spurt on startup for the rockers and its only a few seconds before oil returns to the oil tank to begin circulation. So that brings us back to the main oil seal blowing out.
Last night I realized that an Oring between the primary sprocket and the oil seal would prevent the oil seal from blowing out. An 1/8" cross section with 1-1/8" ID should fit very well and have minimum clearance. It hasn't been tested but I can't see a downside.
Forget about those disaster prone oil shutoffs. Throw in a cheap Oring instead (use silicone or viton for exposed belt drives so they won't dry out and crack). I hope this solution checks out positive and puts this whole wetsumping issue to rest.
The only real problem with wet sumping I've heard of is blowing out a main crank seal. Too much oil in the sump is going to lube the cam and the journals. Too much oil in the timing chest is going to cover the oil pump and give you a spurt on startup for the rockers and its only a few seconds before oil returns to the oil tank to begin circulation. So that brings us back to the main oil seal blowing out.
Last night I realized that an Oring between the primary sprocket and the oil seal would prevent the oil seal from blowing out. An 1/8" cross section with 1-1/8" ID should fit very well and have minimum clearance. It hasn't been tested but I can't see a downside.
Forget about those disaster prone oil shutoffs. Throw in a cheap Oring instead (use silicone or viton for exposed belt drives so they won't dry out and crack). I hope this solution checks out positive and puts this whole wetsumping issue to rest.