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Old 11-29-2021, 01:40 AM   #1
norham
 
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Default notchiness while depressing clutch pedal

After several hours chasing the search function I've found no joy. My '92 extendo model w/K24a and 5 spd box has had a merely annoying "notch" about half way through the arc of travel of the clutch pedal. Time and annoyance factor has won.



Can feel the bump definitely inside the bell housing. Anyone have any idea what I may find to be the culprit?


Thanks to all who make this site possible, you've saved me a lot of time and frustration....
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Old 11-29-2021, 01:47 AM   #2
89'HBV6
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Well, your clutch is hydraulic. Have you checked the fluid level? It is important...


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Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 11-29-2021, 05:35 AM   #3
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Fluid level is halfway between add and full lines. Vibrations from the clunk that coincides with the pulse felt through the clutch pedal can be felt at the bell housing. There is no noise from the throw-out bearing, no problem shifting other royally messing up my timing and clutch doesn't slip. My Trunk-Monkey Dave was a 20 year line mechanic for Nissan and he's not encountered this before. I'm ready to take this baby apart..but not if I don't really need to.


Looks to be time to sweep the floor in the garage....Thanks
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Old 11-29-2021, 02:36 PM   #4
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does the "notch" show up at the same time as the slave cylinder movement at the bell housing... (slave arm lurching forward)? You would need 2 people to figure this out.
If so, maybe something is damaged in the throw out bearing arm pivot mechanism.
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Old 11-30-2021, 12:17 AM   #5
cadillacdude1975
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Delete the clutch damper and see if the problem goes away.
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Old 11-30-2021, 04:43 AM   #6
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I've read that before CD1975. There doesn't seem to be anything is about to fall off, it messes with my shifting timing. I'll need to see what's inside the damper, is it a valve?
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Old 11-30-2021, 04:46 AM   #7
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Oh, I've forgotten to mention, it doesn't do it all of the time and seems to worsen as the vehicle warms up....
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Old 11-30-2021, 08:07 PM   #8
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After reading the sticky on disabling the clutch damper and sleeping on the quirk over night I have another question. If the rubber internals of this damper are indeed wearing out after a measly 304,000 miles, could pieces of this rubber restrict the flow of hydraulic fluid until pressure builds up to a critical/violent release point? Dang, these modern, complicated vehicles are a pain....
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Old 12-01-2021, 02:38 AM   #9
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Yes the diaphragm breaks down and could possibly do that.
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Old 12-01-2021, 06:49 AM   #10
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Sweet, I'll change the clutch master/slave cylinders also. Bleed once. Thanks a lot to all, I feel back on track. This is a great machine and a great forum....
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