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Why does lightly pumping clutch pedal change pedal feel Posted by dbreid [Email]  (#1192) [Profile/Gallery]
(more from dbreid) on Thu, 22 Oct 2009 08:51:44
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All,
I recently bled my clutch slave/master, (original post below, pasted), and it improved slightly. But this week, I have noticed if I drive the car, and "pump" the pedal just through the top inch of its stroke - the part where it doesn't encounter resistance- it greatly improves pedal feel. It engages much closer to the top, and feels great.
Any ideas why that might be?
-Dan
_____________________________________________________________
------BEFORE BLEEDING-----
The clutch released very close to the floor.
The clutch grabs well, and with disc itself doesn't seem worn, no slipping etc.
No fluid loss in the system that I can tell.
No wet spots on the floor.
Clutch Master cylinder replaced (professionally) about a year ago.
The clutch pedal could be pushed about an inch/inch and a half before getting to "resistance".
I wanted instant resistance, and to have the clutch release further "up" in the stroke, so there was no chance of clutch drag if the pedal wasn't stabbed all the way to the floor.
----DURING... HOW EXACTLY I BLED THE SYSTEM------
Here are the steps I took.
1.) Bought two big jugs of fresh DOT4.
2.) Have Motive Power Bleeder.
3.) Test fitted Motive dry. Made sure it would hold 16psi and not leak.
4.) Disconnected Power Bleeder, and filled up about 1.3 of the way with clean DOT4.
5.) Fitted a clear hose to the slave bleed nipple, and stuck the other end in a jub of clean DOT4 (not full, but covered the end).
6.) Filled the reservoir, and refitted the Motive, and pressurized to 15-16psi.
7.) cracked the bleed nipple (13mm) on the slave.
8.) At this point, no fluid really flowed, so I slowly moved the clutch pedal up and down to start fluid moving.
9.) Repeated 8, until the fluid ran clean.
10.) Sealed the nipple.
11.) Siphoned off (turkey baster) the extra in the reservoir.
12.) Capped the Reservoir, and tried it.
------RESULTS---------
Immediately after bleeding, the pedal seemd 100% better. It engaged nearly at the top, and released about halfway through the stroke. SUCCESS!
However... After driving it for a day, it is back to what it was before.
, Thu, 22 Oct 2009 08:51:44 <-- Viewing This Message, Thu, 22 Oct 2009 12:00:08
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