If the hose is clogged the clutch will be slow to engage when you let
the pedal up, but it does not necessarily slip after full engagement.
The clutch pipe and hose are large bore for quick flow to allow fast
engagement of the clutch. If you press the pedal full down, then
lift your foot as fast as possible, the pedal should follow your foot
as fast as you can lift it. With only moderate speed of pedal push
and lift the down force and up force pressure of pedal against your
foot) should be very similar. If the force required for rapid push
is high, and the return pressure with rapid lift is substantially
lower, that is indication of a clogged hose. If the pedal goes down
easy and comes up quick with nearly same force, then the hose is probably okay.
If the clutch slips when you push the throttle on steady cruising or
going up a hill, then the friction disc is likely worn thin at end of
life. Lots of oil on the clutch parts can have the same
effect. Either way the engine has to come out for inspection and repair.
At 03:59 PM 11/11/2012 -0500, Tom Gunderson wrote:
>My clutch seems to work fine when I first start the car. After about
>15 minutes of driving the clutch seems to slip. I can press the gas
>while in 4th gear ,45 to 50 miles an hour , and can feel and see
>that the clutch is slipping. The tach rpm goes up without speeding
>the car up. Could this be the hose at the slave cylinder? I have
>read that the interior of that hose can break down and create a
>oneway valve. Is there any way to check the clutch without pulling the engine?
>....
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