| Re: 87 vett destroying clutch master cylinders |
Subject: Re: 87 vett destroying clutch master cylinders by istter1 on 2012/3/8 14:18:32 The fluid is dark black it was black within a week after everything was replaced. Below is a quote fron another site about the color and crap in the fill cup. Quote: Originally Posted by Ranger I had an interesting conversation with a SSCA race team crew chief yesterday about clutch fluid. Cliff Notes follow: (1) Fluid in the clutch hydraulics falls prey to the same adverse issues (heat and water) as fluid in the brake hydraulics. (2) Race team changes the clutch fluid at every opportunity, not less than daily, doing a full bleed, often involving several quarts. (3) Changing the clutch fluid aggressively is part of the routine for the C5R/C6R. (4) On street cars at normal operating temps, the clutch fluid in the actuator (slave) runs at no less than 230 degrees. Under launch and high rpm shifts, the friction involved produces fluid temps over 400 degrees. Not an issue for fresh fluid. But problematic is the fluid isn't fresh. (5) The actuator (slave) is at the lowest point in the clutch hydraulics. Therefore it collects by-products spawned by heat and water. If those aren't flushed regularly, issues will follow. (6) The clutch master cylinder cap is vented. When hot clutch fluid cools, air is drawn in and absorbed by the (brake) fluid. Black nasty clutch fluid is a sign of deterioration by heat compounded by corruption of water. Both combine to drop the boiling point of the fluid well below 400 degrees. The dirtier the fluid is the lower its boiling point. (7) He said we are smart to keep the clutch fluid clean. He said my protocol will work for street cars. But obviously, full bleeds are the race-car routine. (8) He said if the slave is full of debris, it takes many flushes to get it cleaned out. And sometimes it's just easier to replace the slave altogether. So what is causing this build up in my systen so quickly? |
