What did I break!!!

ZoomZ

After the failed attempt at changing my crank pulley,
see thread here: Lets talk pulley

My clutch pedal engagement is now very high and I want to say softer feel. Not certain on feel but definitely higher engagement.

A little back story, if you don't read the pulley thread. I had the gear in 6th and PB set while trying to break the crank pulley bolt loose, turning engine backwards. I tried 1st gear, but it engine was turning.

I put a lot of force on the breaker bar. I did hear a clunk once I released PB and put xmission in neutral after many attempts.

Anyway, changed the serpentine belt, put everything back together and went for a drive.

No noises, no gear grinding or poor engagement of gears. No clutch slippage in all phases of throttle. No CEL or others. Car seems to be driving normal.

Starting in 1st, its high engagement but I feel the clutch grab. Going from 2nd to 3 or 4th to 5th, it's high pedal engagement but I feel no definitive "grab". If I try to press gas based on my habits and middle clutch pedal engagement, obviously car will surge forward based on higher engagement.

My only guess is that I have deformed the Diaphragm springs on clutch cover.

31,000 Miles on OEM components.

Any other thoughts/suggestions?

(p.s. This is not Placebo effect. It's definitely changed )

SG4247

What action would have deformed the diaphragm spring?
The clutch was “off” during the pulley fiasco right?

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Rusty

The clutch issue is unrelated to the crank pulley.

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ZoomZ

Weird. I hate when coincidence sh*t like this happens.

ZoomZ

Wouldn't clutch be engaged?. It's when you push pedal that it disengages.

Anyway, I don't know what would cause it to be deformed. I'm only eliminating possibilities.

phunk

The starter turns the flywheel ring gear which is attached to the crankshaft directly. I don't see how it could effect the clutch at all unless you actually worked the flywheel off, which wouldnt happen, and would cause crank trigger issues and lots of noise if you did.

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ihaveashihtzu

It seems that he left the car in gear to hold the crank from spinning vs. using the starter and breaker bar on the ground method.

phunk

Yes, but the clutch is not between the flywheel and crank pulley. The starter leveraged the flywheel, which transferred torque through the crankshaft to the pulley bolt and tools he had wedged up. There would be no unusual stress to the clutch assembly while doing this.

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ihaveashihtzu

From his old thread he mentioned he didn't use the starter at all, no?

He left it in gear and tried to manually loosen the crank pulley bolt with a breaker bar.

What am I missing?

phunk

Someone said they bumped the starter, I thought that was him, but I guess it was someone else that said that.

If he got it off by putting the car in gear and using the drivetrain to keep the crankshaft from rotating, than it would have loaded the clutch concentrically, like when you drive.

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ZoomZ

No Guys. I did NOT bump the starter to remove crank pulley. Another guy did.

I used transmission and PB to hold everything while I tried to undo crank shaft bolt with breaker bar.

So clutch would be engaged to flywheel.

z

Rusty

That's how I did it. I had the breaker bar up between the radiator and motor. With a section of pipe on the end of the breaker bar. Had a 2" extension for the socket.

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"The Difficult Anytime, The Impossible By Appointment Only"
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ZoomZ

I was there too. Tried every which way. The Bugger is tight.

ZoomZ

Please verify/add to my progression of troubleshooting and future steps in order to solve this.

Today, I inspected from Clutch Reservoir down to pedal assembly. Found nothing broken, loose or leaking.

I did a complete flush and bleed of Clutch fluid with RBF600. Got some air out, but negligible. Can't really say how I would have introduced air to begin with. That portion is eliminated.

Test drive produced same results. Engaging on a hill, is very difficult as I cannot feel clutch grabbing and I'm almost at top of pedal travel. Something I would have to get used to.

So the next easy, least expensive and intrusive step is to replace the pedal assy and MC with RJM kit. Is this logical? or is there anything else I can do without removing transmission?

and I am owing $2000 to ZSpeed for clutch kit.

Rusty

Does the clutch feel like it's slipping?

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html