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...I take it, won't DISENGAGE the tranny, that is, since you say there is no feedback in the pedal at all, you seem to be saying it flops up and down without doing any work?
The pedal SHOULD be pushing the master cylinder piston, thus pushing the fluid in the line and pushing the slave cylinder, sliding the release bearing towards the pressure plate, depressing the pressure plate spring fingers and releasing the pressure plate's grip on the clutch friction plate, taking the engine out of link to the tranny input shaft.
If that's what's going on I'd say the clutch master cylinder probably decided after prolonged pressure on its rubber cup to give up the ghost. Or the clutch slave cylinder under prolonged pressure on its o-rings, developed a leak. Or there's a leak somewhere in the hydraulic line.
If your brake fluid reservoir, also the clutch fluid reservoir, is still full and doesn't drop after repeated pushes on the clutch pedal, then the problem would be the master cylinder, not a leak at slave or in line.
If however by "clutch won't engage the transmission" you mean just that, that the pedal flops freely and the car won't go in any gear, then I'm mystified. The pressure plate is a massively strong set of springs and not easily jammed and certainly not possibly totally broken or made to lose all spring temper.
My money is on a bad clutch master, the cheapest and easiest fixed also. And I really find it hard to believe that even the heaviest floor mat, jammed however hard, even with stuff piled on it, could hold the clutch pedal depressed for even a few seconds, let alone weeks. To hold against the pressure of the pressure plate springs it usually takes something like a chunk of 2x4 jammed between the pedal and the front lip of the driver's seat.
My guess would be the master gave up the ghost either just as the car was parked or sometime during its downtime, coincidentally, and either the floor mat was never on it or not really pushing it down even if it did get flopped up on top of the pedal.
Bleeding things might help especially if the problem is a leak from a somehow loose bleeder screw but I wouldn't put much hope in it as a cure in itself.
posted by 71.173.7...
, Tue, 18 Nov 2014 16:01:26
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