2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Clutch Problem

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Old Dec 12, 2017 | 08:03 AM
  #1  
Roonie Vu's Avatar
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From: Japan
Exclamation Clutch Problem

Hello! I'm driving a 1991 FC3S.
I was wondering if anyone has had this problem with their clutch but recently after I drove over a speed bump way to fast my clutch has failed to act normal. If I put my foot on the clutch with little to no weight the pedal will reach the floor and get stuck. When I do engage the clutch with the pedal all the way down, the clutch will make an unusual noise that is foreign to what it should sound like, after a few seconds (5-10) it will engage itself and the pedal will get stuck to the ground. I tried replacing the slave and the line with a braided one. Nothing much changed. It stays disengaged longer but will still do the same problem. My next move is to replace the Master Cylinder and hoping to the holy rotary gods that it will be the fix. I don't drive it anymore because getting out of first it wont catch correctly and going into first it will catch weird and make a banging sound once it does catch and reverse.
Thank you for your time. Sorry if I posted in the wrong place. New to this forum.
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Old Dec 12, 2017 | 08:18 AM
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rotorhole
 
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From: retired rotorist
could be a broken clutch fork pivot.

if you can wiggle the clutch fork arm side to side more than a little then it's busted.
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Old Dec 12, 2017 | 08:25 AM
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If it's broken would it still disengage? I'm fairly new to learning all these parts. We think the pressure plate is loose from the speed bump I ran over. I'm really hoping it's not any trans work because it sounds like it. I can't find any mech who can fix it asap. I'm running out of time >_<
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Old Dec 12, 2017 | 08:31 AM
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rotorhole
 
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From: retired rotorist
pressure plates don't come loose from a bump, i'm pretty sure your problem starting just after the bump was purely coincidental. if anything the bump caused you to press the clutch faster than you typically would, which caused the master cylinder seal to fail and bypass, allowing air in, or the clutch fork pivot to snap due to the additional pressure from rapid application.

Last edited by insightful; Dec 12, 2017 at 08:33 AM.
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Old Dec 12, 2017 | 08:33 AM
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I see. I'm going to jack the car tomorrow, remove the cover, and try to see if the clutch is moving abnormally. If the Pivot is damage/broken/worn would there be any visual way I could identify that from the bottom cover? :o
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Old Dec 12, 2017 | 08:35 AM
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rotorhole
 
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From: retired rotorist
you could remove the starter and you might be able to see it with a mechanic's mirror or digital borescope. the bottom cover only if it's a turbo car, the non turbo inspection plug doesn't give much space to see anything.
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Old Dec 12, 2017 | 09:11 AM
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Yeah mines turbo. I'll try to keep an eye out for it. If the pivot is damaged would it wobble any more? Anything noticeable?
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Old Dec 15, 2017 | 07:22 AM
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bump.
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