Now after finishing up the plenum stuff, i was driving it around today and started hearing a scrapping like noise every time i press the clutch in,even if i press real light it starts it, not sure how to describe to me
scrapping & it gets worse the longer i leave the clutch in, though it does seem to be getting worse,goes into all gears fine just noisy, have had clutches(other vehicles)gone out on me before but this is different.
it's been sitting up for about three months until plenum work yesterday.
the first time i cranked it after all the parts replacements it didn't do it at all.
today i put about 100 miles on it running around town there was alot of traffic i had to go thru.
Do you guys think it's because of the sitting up combined with the stop and go clutch in/out traffic?
How many miles on the clutch set up? It kind of sounds like a dual mass flywheel problem. Sicne it only happens when the pedal is pushed, it might just be the throw out bearing. Hopefully is just that and not the flywheel.
How many miles on the clutch set up? It kind of sounds like a dual mass flywheel problem. Sicne it only happens when the pedal is pushed, it might just be the throw out bearing. Hopefully is just that and not the flywheel.
1990 with 29,105 miles
I'm assuming it's the original set-up , although the slave has been changed yr or so before i got it, so far two+yrs old.
it's completely new noise, when i pulled it in the garage three months ago it shifted and work just fine.
Like you said, its been sitting for a while. It could very well be that throwout bearing. It's almost the same hassle to change it out, just less expensive than a flywheel..
Like you said, its been sitting for a while. It could very well be that throwout bearing. It's almost the same hassle to change it out, just less expensive than a flywheel..
Throwout & pilot bearings are common issues. My white 91 with 27,xxx miles did what sounds like the same thing. When we inspected the clutch it looked almost new, you will be surprised when you open it up. If you need to replace I suggest you do the pilot & throwout bearing together. You have several choices on pilot bearings, the stock brass, brass fluted, or the needle bearing. Do not use the stock brass, upgrade to either of the others. You'll get lots of feedback on which to use but one seems to be as good as the other. I have the fluted in mine and Uly just put the needle bearing in his.
Throwout & pilot bearings are common issues. My white 91 with 27,xxx miles did what sounds like the same thing. When we inspected the clutch it looked almost new, you will be surprised when you open it up. If you need to replace I suggest you do the pilot & throwout bearing together. You have several choices on pilot bearings, the stock brass, brass fluted, or the needle bearing. Do not use the stock brass, upgrade to either of the others. You'll get lots of feedback on which to use but one seems to be as good as the other. I have the fluted in mine and Uly just put the needle bearing in his.
Cheers,
RH
Thanks
i printed out the ZR1net "ZR1 Clutch replacement" section
Any other thoughts ideas and opinons are GREATLY appreciated
With all the very helpful input on under plenum advice...i hate to get started without it on this project.
When I first got my '90, the throwout bearing occasionally made a noise similiar to what you describe. The car only had 9700 miles on it so I knew that the bearing was ok, but probably just some corrosion on it. The noise eventually went away completely after a few hundred miles.
I'd be willing to bet that if you drive the car as often as you can for the next few days the noise will go away just like mine did.
When I first got my '90, the throwout bearing occasionally made a noise similiar to what you describe. The car only had 9700 miles on it so I knew that the bearing was ok, but probably just some corrosion on it. The noise eventually went away completely after a few hundred miles.
I'd be willing to bet that if you drive the car as often as you can for the next few days the noise will go away just like mine did.
TomC
'90ZR1 #792
Crabs I apologize for the late response, my younger brother past away last week and everything came to a halt.
Thanks for the response, i drove it the other day and it does seem to be getting slightly better, did notice alot of heat coming from the shifter area after a full day of driving....any ideas what that might be?
and also can hear slight whining when shifting gears sounds to me like normal trans noise, considering I really have'nt had much driving time in the car since i've had it.
Crabs I apologize for the late response, my younger brother past away last week and everything came to a halt.
Thanks for the response, i drove it the other day and it does seem to be getting slightly better, did notice alot of heat coming from the shifter area after a full day of driving....any ideas what that might be?
and also can hear slight whining when shifting gears sounds to me like normal trans noise, considering I really have'nt had much driving time in the car since i've had it.
Luis
Luis,
Sorry to hear about your loss...that is hard to take when you lose a younger sibling. We offer our prayers to you and your family.
I'm not sure about the heat issue, I would check the oil level in the trans and/or replace the trans oil with the Castrol TWS 10W-60 for starters. The noise you hear from the trans is the beautiful sound of the ZF...I love that sound! It is nothing to worry about it just harmonizes nicely with the WLT5 radio station!
Crabs I apologize for the late response, my younger brother past away last week and everything came to a halt.
Thanks for the response, i drove it the other day and it does seem to be getting slightly better, did notice alot of heat coming from the shifter area after a full day of driving....any ideas what that might be?
and also can hear slight whining when shifting gears sounds to me like normal trans noise, considering I really have'nt had much driving time in the car since i've had it.
Luis
Luis:
First and formost, sincere condolences to you and your family on your loss.
I can't say that I've ever noticed heat coming from the shifter area, actually I can't say that I've driven my car all day either.
Mine does get warm around the footwells after an hour or so of driving, but I've honestly never felt heat from the shifter.
I'd check the tranny fluid level. If it's low it might cause symptoms as you describe such as the whining between gears.
Give Bill Bouderau the "ZFDoc" a call, he might be able to diagnose the transmission without seeing it. http://www.zfdoc.com
I have had intermittent noise, and assumed it was bearing also. I am not terribly concerned, as it goes away, but when I get the ZF done by Bill B. I'm definitely going to upgrade.......man I just hate the thoughts of shutting down the beast for a time!
Well , I lost the clutch pedal today at Lunch sitting in drive thru at Whataburger
pushed clutch in put in 1st just b-4 i could let it out , it lurched forward and died....after that no pedal at all...pushed it to a parking spot and checked under car for fluid...none ..... ck'd the master and it was dry as a bone, had buddy bring me some fluid hoping it was just low , added and pumped and leaked all out on concrete... got a flatbed and took her home... but thankful it wasn't on the freeway ...
Well , I lost the clutch pedal today at Lunch sitting in drive thru at Whataburger
pushed clutch in put in 1st just b-4 i could let it out , it lurched forward and died....after that no pedal at all...pushed it to a parking spot and checked under car for fluid...none ..... ck'd the master and it was dry as a bone, had buddy bring me some fluid hoping it was just low , added and pumped and leaked all out on concrete... got a flatbed and took her home... but thankful it wasn't on the freeway ...
For this reason I never take my Z to the whataburger
Well , I lost the clutch pedal today at Lunch sitting in drive thru at Whataburger
pushed clutch in put in 1st just b-4 i could let it out , it lurched forward and died....after that no pedal at all...pushed it to a parking spot and checked under car for fluid...none ..... ck'd the master and it was dry as a bone, had buddy bring me some fluid hoping it was just low , added and pumped and leaked all out on concrete... got a flatbed and took her home... but thankful it wasn't on the freeway ...
Bummer.
Nothing more embarassing than pushing your multi-gazillion dollar super high horse power sports car out of the drive through at the local choke and puke.
There was lots of post about faulty slave cylinders fairly recently, be sure to search the archives and read up on it before you go out and buy a replacement. It was something about an internal seal that was installed backwards.
It's such a fun job replacing the slave and master that you'll only want to do it once.
First my prayers to you & your family. May your brother be a half hour in heaven before the devil knows he's passed!
The missing fluid may well be found in the insulation under the carpet in the foot well. Pull the hush/bolster panel down & feel under the carpet for fluid dampness. Even look up, yes not fun, at the clutch pedal & push rod for signs of fluid. Also the slave will/can leak out the front into the B/housing. In any event if you have to order up some parts, Bill says to replace slave & master & hose all at the same time. Just go & read up on the trouble GM has had with quality control on our parts. Bill has a write up at the site.
I want to:
drop the tranny, change the oil, change the clutch and related parts, change the master, line & slave, and change oil in the rear-end.
I have some good jack stands, but need to get going on buying all the parts. probably be a good idea to read up on what's all involved.
Prev owner said he changed the master, it looks new but the line looks original. other than that i haven't started tearing into it need parts.
Any more pointers on removal steps , parts vendors, OPINOINS especially and such you guys may have are GREATLY appreciated!
Sorry Luis I forgot to add something about the parts. Senility I guess. If you have a 90 and go to a dealer to buy the parts they may tell you the line and the slave are NLA. They have been superceeded by the slave and line from 91 thru 96 slave & line. The 90 P/N's come back as NLA if looked up by mod yr application. Truth is that 89 thru 96 C4 w/zf6spds are all thesame parts.
A word of caution on the hydraulic parts, I have not seen or heard about the Q/C problems being addressed and corrected. See Bill's site for the details. There are two types of parts: OEM/ OEM style aftermarket cylinders are DOM (Drawn Over Mandrel) and aftermarket only cast type parts. The lines are all OE/ style s/s braided + preformed metal combos. The slaves have the seal in backwards hence they don't work for long or correctly....suffer pressure loss upon actuation. Ther are also bore variation (runout) issues and porosity issues. The masters don't suffer the seal problems but do have some run out & porosity issues. Oh, also the welds at the bungs for the line leak sometimes!
I hate to spend your $ but you may want to look at the D/Mflywheel while you're in there....it would be a shame to have to go back again later if the D/M goes south.....big $ on the D/M. Just think about it.
The hardest part on the hydraulic system is bleeding it correctly. The FSM says you can do the push the pedal routein....I finally did bench bleeding on both cylinders and bought a phoenix injector to do the final "installed bleed". Which ever way you go try to get both cylinders loaded as much as possible before installing them.
Tom
Senility strikes again! Get the beam plates and the removal tool kit from Bill.....it will make life soooo much easier!!!!
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Clutch Making Noise...
