Release Bearing making noise after 1,000 miles?
02-23-03, 03:55 AM
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Release Bearing making noise after 1,000 miles?
Hello. As usual, I am having horrendous driveline problem. After rebuilding my engine, I got a Racing Beat Heavfy Duty Clutch plate and Street/Strip heavy duty disk from Mazdatrix (the kind with NO spring inbetween the friction surfaces, but it DOES have a sprung hub).
I put it all together, including a new pilot bearing and release bearing, and there were a number of problems: extremely severe engine vibration, rather sudden engagement, and excessive noise. I thought that maybe these things would even out as the clutch ran in, but they have not. There is also was and still is a very noticable vibration in the steering wheel at idle, and the engine lurches around alot in first or reverse.
Now, as far as I can tell, my release bearing is shot. At idle with the clutch in, there is a fast rubbing noise, which varies with erngine RPM. Its very difficult to describe the sound, I will try to get a recording, but it does sound like my release bearing has gone bad. After only 1,000 miles? Why did that happen? Can a bad pilot bearing cause the release bearing to go bad? Something not aligned right? (I used the alignment tool they gave me...) Wrong size clutch disc?
Any advice would be appreciated.
Thanks,
Andrew
I put it all together, including a new pilot bearing and release bearing, and there were a number of problems: extremely severe engine vibration, rather sudden engagement, and excessive noise. I thought that maybe these things would even out as the clutch ran in, but they have not. There is also was and still is a very noticable vibration in the steering wheel at idle, and the engine lurches around alot in first or reverse.
Now, as far as I can tell, my release bearing is shot. At idle with the clutch in, there is a fast rubbing noise, which varies with erngine RPM. Its very difficult to describe the sound, I will try to get a recording, but it does sound like my release bearing has gone bad. After only 1,000 miles? Why did that happen? Can a bad pilot bearing cause the release bearing to go bad? Something not aligned right? (I used the alignment tool they gave me...) Wrong size clutch disc?
Any advice would be appreciated.
Thanks,
Andrew
02-23-03, 05:30 AM
#3
Well, if it's a noise with the clutch pedal depressed, the trans shouldn't be turning, so noise probably from a bearing, not trans. With car at idle, just push the pedal down slowly (just take up free play) until the t/o bearing engages (resistance in pedal), do not push down to floor, and see if noise appears. Let the pedal back out, and noise should dissapear. Hopefully, there is "play" at the top of the clutch pedal. If not, the t/o bearing could have been riding on the pressure plate, and therefore turning, the entire time you were operating the car. If there is no noise, only when pedal is to the floor, pilot bearing. It could have been damaged at time of installation.
02-23-03, 06:50 AM
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Keep Right Except to Pass
The vibration would worry me the most. An unbalanced PP? If it goes together then it's lined up correctly. The TO bearing issue seems minor in light of the vibration.
02-23-03, 09:31 PM
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Is it possible that maybe I have the wrong clutch disc? I was just looking @ the act clutch sight, and it says specifically I need an 8mm thick disk ; is it possible that I got the wrong diameter/thickness disk? or would things not fit together at all then when I installed them?
Also, to install the pilot bearing, I used a socket of the same size to push on it and hammered it in; is that not the right way to do it?
Also, to install the pilot bearing, I used a socket of the same size to push on it and hammered it in; is that not the right way to do it?
03-03-03, 01:01 AM
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I got a recording of the worrying sound that I am here. get it here:
http://gunnar.caltech.edu/~pullin/2_2.wav
It will come through the best if you turn your bass all the way down... then the particular sound is very audible.
Is that my pilot bearing? Release Bearing? Clutch disc? Pressure Plate?
http://gunnar.caltech.edu/~pullin/2_2.wav
It will come through the best if you turn your bass all the way down... then the particular sound is very audible.
Is that my pilot bearing? Release Bearing? Clutch disc? Pressure Plate?
03-03-03, 01:58 AM
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1). Your motor mounts are completely fried (torn, ugly, nasty, cracked, mush, etc...)
2). You have a street / STRIP clutch... no spring between the friction surfaces.
I have driven the car, and if you're a bit more careful that usual with it, the engine doesn't 'vibrate' (the 'vibration' is actually the motor shaking around on the mounts as the clutch grabs/slips, courtesy of a lack of driving skill and absolutely horrid mounts
). Get new motor mounts!
Second, not having the spring btw. the friction surfaces will make the clutch engage faster ('snappier'). That's what makes it harder to modulate, and when you put that together with 13 year old, 170,000 mile original driveline mounts and throw you behind the wheel, driveline mayhem is bound to ensue!
As for the whirring noise, it sounds like it 'spools up'. At idle, if the clutch is depressed then it is OK for a few seconds, and the noise gradually surfaces. It's not the clutch disk (whirring is too slow for that), and the release bearing would make noise the second it was depressed if it was bad (I would imagine). If this is correct, it also rules out the Pressure Plate. I'd imagine that there's either something up with the pilot bearing, or the clutch isn't disengaging 100% (maybe like 99%), and it slowly spins the tranny input shaft up even when the clutch is depressed, thus making the noise.
In case you guys haven't figured it out yet, I'm his buddy and helped him rebuild / install the motor and clutch
-Manolis
P.S. Did I mention ... GET NEW MOTOR / TRANNY MOUNTS ALREADY?
2). You have a street / STRIP clutch... no spring between the friction surfaces.
I have driven the car, and if you're a bit more careful that usual with it, the engine doesn't 'vibrate' (the 'vibration' is actually the motor shaking around on the mounts as the clutch grabs/slips, courtesy of a lack of driving skill and absolutely horrid mounts
). Get new motor mounts!Second, not having the spring btw. the friction surfaces will make the clutch engage faster ('snappier'). That's what makes it harder to modulate, and when you put that together with 13 year old, 170,000 mile original driveline mounts and throw you behind the wheel, driveline mayhem is bound to ensue!
As for the whirring noise, it sounds like it 'spools up'. At idle, if the clutch is depressed then it is OK for a few seconds, and the noise gradually surfaces. It's not the clutch disk (whirring is too slow for that), and the release bearing would make noise the second it was depressed if it was bad (I would imagine). If this is correct, it also rules out the Pressure Plate. I'd imagine that there's either something up with the pilot bearing, or the clutch isn't disengaging 100% (maybe like 99%), and it slowly spins the tranny input shaft up even when the clutch is depressed, thus making the noise.
In case you guys haven't figured it out yet, I'm his buddy and helped him rebuild / install the motor and clutch
-Manolis
P.S. Did I mention ... GET NEW MOTOR / TRANNY MOUNTS ALREADY?
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