Random clutch engagement point - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums
 
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post #1 of 3 (permalink) Old 02-22-2015, 06:38 PM Thread Starter
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Random clutch engagement point [Solved]

Hey guys, long time lurker first time posting.

Having a problem with my clutch randomly engaging 1/2in off the floor before returning to normal 3-4 stops signs later. When it happens, it's starts to grab 1/2in off the floors (feels like it's only engaging 20%) then the pedal has very little resistance and doesn't clamp any harder until you reach the normal engagement point. It does not however prevent me from getting into or out of gear. just wondering if anyone else had something similar.

Background---------------------------------------------------------------------

-78k miles

-clutch plate/throwout bearing/pressure plate/flywheel replaced last summer

-Master and slave cylinder replaced last fall

-hydro system bled 8 times since initial master/slave install-----tried gravity, buddy pumping the pedal, vacuum, pressure from res, pressure from slave

-Cylinders hold pressure and do not leak



Conditions when it happens----------------------------------------------------------------

Exterior temperature- Slight correlation: clutch Pedal changes character depending on the day. Some days it's very light and vague, other days it's very firm and responsive.

I.E.
temp>40 it's very light with no feeling
temp=40 just about perfect, decent weight and can feel the engagement point well
temp<40 firm and sluggish (probably normal, couldn't hurt to add)

Engine bay temperature- Slight correlation: After driving on the highway it happens more frequently but not always.

Pedal travel rate- No correlation: If I drive gingerly or aggressively it happens equally.

Other things that don't seem to impact: auto stop / inclination(%grade) / holding the pedal down / or time per stop

---------------------------------------------------------------------------------

The only thing I can think of at this point is a problems with the release fork/throw out bearing, or somehow somewhere the hydro system is sucking in air. Sound familiar to anyone?

Thanks for taking a look and I'd really appreciate some help if you guys have any ideas.



Edit: Solved

The boot on the clutch release fork was letting moisture in which ruined the grease between the fork and ball joint bolt. eventually it wore down a flat spot or ridge on the fork which it was getting caught on while you release the clutch.

Short term fix: unbolt slave cylinder, pull off fork boot, pack some more grease in the ball socket.

Actual fix: $$$$$drop the transmission$$$$$$ and replace the fork/retaining spring/release fork bolt/fork boot
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post #2 of 3 (permalink) Old 04-20-2017, 04:40 PM
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I've been having a similar problem. It's only occasional, and the dealer can't find any problem. Did you ever find a solution to this? If so, please share!

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post #3 of 3 (permalink) Old 04-20-2017, 07:29 PM
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Quote:
Originally Posted by Brian_G View Post
Edit: Solved

The boot on the clutch release fork was letting moisture in which ruined the grease between the fork and ball joint bolt. eventually it wore down a flat spot or ridge on the fork which it was getting caught on while you release the clutch.

Short term fix: unbolt slave cylinder, pull off fork boot, pack some more grease in the ball socket.

Actual fix: $$$$$drop the transmission$$$$$$ and replace the fork/retaining spring/release fork bolt/fork boot
Quote:
Originally Posted by rallyr View Post
I've been having a similar problem. It's only occasional, and the dealer can't find any problem. Did you ever find a solution to this? If so, please share!
did you not read the whole post, or was this added after you posted? I legit can't see on mobile when the post was edited,so I'm not trying to be entirely condescending.
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