Thread: SC Ceramic Washer Failure
07-13-2005, 04:49 PM #1
SC Ceramic Washer Failure
My same old broken record question. In light of the news that 05 stock SC setups have shims...
Has anyone seen a ceramic washer break and fall into the engine where a shim was not installed?
07-13-2005, 08:06 PM #2
Not that I have heard of, but maybe.
Now I did notice something when rebuilding my SC. The SC shaft is Hollow, and its has an exit hole under the 40 needle bearings.
Now it looks as if they originally designed the SC to have oil pumped into the end of the SC shaft then to the needle bearing and then out through the groves in the SC gear. This would give a far better oil supply to the ceramic washers and needle bearings.
As it works now they just spray oil on the outside of the SC, this means that at high RPM, no oil will ever get into the SC inner areas due to the extremme centrafugial forces present at up to 40,000 rpm. So when it needs oil the most, it gets the least.
A simple fix would be to somehow suppy that oil that it seems to have been designed to get and then the SC would probably las 100's of hours.
Ceramics shatter from heat, heat is created from lack of lubrication, lack of lubrication is due to oil not getting to anywhere except the outside surfaces f the SC.
It can bee seen on page 205 of the service manual on the cutaway of the SC clutch.
I tested this by injecting oil in the end of the SC shaft and it came out through the 8 slots in the SC drive gear.
Just a thought,
07-13-2005, 08:48 PM #3
If the oil is only being sprayed on the outside wouldn't it try to build different heat levels from the inside to out? If that is the case you would get dissimilar expansion of the washer and they would shatter. It would be like throwing glass into a firepit. It never heats evenly and breaks.
The guys that are reving even higher than normal would be getting even less oil to the discs. It would just hit and fly off.
Maybe there is a better lubricant out there for this.
The other question I would have is if we keep the oil at mid dipstick does it affect the oil to the clutch?
07-13-2005, 08:53 PM #4
"Maybe there is a better lubricant out there for this?"
Did anyone ever try using synthetic oil with the RR Clutch?
07-13-2005, 09:12 PM #5
Re: SC Ceramic Washer FailureOriginally Posted by Jarrett
07-14-2005, 07:35 AM #6
I am running the stock sc setup with no shim @ 8lbs torque...And that is all I wil say so as not to jinx myself!!
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