engine and drivetrain Clutch noise...HELP!

[Guest Anonymous]

OK...I just spent the last few weekends replacing the clutch in my '75 '02. Flywheel was resurfaced...pilot and throwout bearings replaced. Started her up and there was an unusual noise...kind of like the sound the fan would make if it were rubbing on the surround by the radiator. That's what I thought it was at first but... When depressing the cluch the noise would abate a bit but never go away.

Also...smoking from the friction (I guess) from the new disc. That went away after a few minutes.

Put the car in neutral with the engine running, release the clutch and the noise goes away. So I drove around the block. Car ran OK. Shifted OK. Clutch released quickly...like maybe I need to further bleed the system...a softer than usual pedal. The noise never goes away.

I don't know enough to describe the symptoms or sound any better. It was a challenge to do the job but I did it all alone. That's something I guess. Now I just don't know.

Any ideas? Suggestions? Is my next stop a "real" mechanic putting her up on a liftt and pulling the transmission again.

Honestly I can't bring myself to pulling it all apart again...at least not for a while. But I miss having the car on the road.

HELP???

[fxtbass]

Sounds like a noisy throw out bearing to me.

[Guest Anonymous]

Is there a means to quiet the bearing without pulling the transmission. Is it able to be lubricated through the throw out fork access? It is a new bearing...perhaps a lemon?

[allbim]

When the car is not moving, what happens when you depress the clutch and put the transmission in any gear? FYI, this stops everything in the transmission from moving.

With the car not moving, while the transmission is in neutral, what happens when you depress the clutch pedal? Does the sound change?

[TobyB]

hmmm-

nothing should smoke...

oh, except the grease on the downpipe!

random things-

did you make sure the friction disc springs were facing the pressure plate?

compare old parts to few?

account for all your hardware? I've left bolts lying in things...

tools, too...

make sure the release fork was in right?

they come out of position easily when you're

trying to get the trans into the pilot bearing...

this is an odd problem-

might take us a while.

On the sad up side, since you've done it once,

it'll take a lot less time if you get to do it again...

t

[Guest Anonymous]

Just a thought.....if it is a 4sp like the Getrag 232 that was the standard trans with your USA '75 there are about 3 different clutch pressure plates that have been installed at different times. Each one has a different throw-out bearing and different part numbers. The main difference is how tall they are. It is possible that your TOB is incorrect and doesent release completely even with a properly bled cylinder. Sounds like you're getting chatter from incorrect release bearing.

[c.d.iesel]

so bleed the clutch again,

continue to drive the car, keep within walking distance

from home or a phone booth

it will either SNAP! BANG! or CLUnK! suddenly

which means the trans comes out again?

or nothing happens and all it was was junque left

in there and it chewed it up and yer good to go

HOW MUCH material was machined off the flywheel?

and did they leave a 'step' as it had originally?

or did thay just machine it all flat?

[Guest Anonymous]

That's a great tip. That's kind of what I thought but...in comparing the new with the old...they looked to be the same. I wonder if machining the flywheel created an issue. I was there when they did it...they took off a fair amount but within appropriate measurement and there was a .018 step. Hmm...

[Guest Anonymous]

I like your approach. It seems to drive fine...just has the noise. Do you think the clutch hydraulics are a factor? The slave actuates fine...will bleeding give the system more oomph...and perhaps a bit more throw? Don't know enough about the system to tell.

[Guest Anonymous]

Drove again this evening...

In neutral, clutch pedal in the noise but less so, clutch pedal out no noise.

In gear clutch in...noise...release pedal and drive slight noise...perhaps none...clutch pedal in to shift, faster noise that whines down, clutch pedal out and drive, no noise.

I think it must be release bearing. New but perhaps faulty or maybe wrong one.

I need to bleed again...still have a soft pedal.

And...does that metal plate covering the back/front bottom area by the flywheel serve an important purpose. It sounds like the flywheel might be rubbing slightly on it.

Car drives fine...shifts fine...except for the quick release on the clutch. I'm attributing that to air in the system.

Thoughts???

[Guest Anonymous]

Drove again this evening...

In neutral, clutch pedal in the noise but less so, clutch pedal out no noise.

In gear clutch in...noise...release pedal and drive slight noise...perhaps none...clutch pedal in to shift, faster noise that whines down, clutch pedal out and drive, no noise.

I think it must be release bearing. New but perhaps faulty or maybe wrong one.

I need to bleed again...still have a soft pedal.

And...does that metal plate covering the back/front bottom area by the flywheel serve an important purpose. It sounds like the flywheel might be rubbing slightly on it.

Car drives fine...shifts fine...except for the quick release on the clutch. I'm attributing that to air in the system.

Thoughts???

[allbim]

Have you checked the endplay of the crankshaft?

What do you mean by quick release? Quick engagement as you take your foot off the pedal?

If the flywheel is rubbing on the cover it will leave a mark.