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Old 05-11-2018, 07:05 PM   #1
DEugene
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Default Squeaky Clutch when Over 80 Degrees

I have a '98 SC2 and the clutch pedal squeaks very badly when the outside temperature gets over 80 degrees....no other time..... I've looked for remedies, and applied some of them, but to no luck...... ANY idea to how remedy this frustrating problem?

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Old 05-11-2018, 07:13 PM   #2
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Default Re: Squeaky Clutch when Over 80 Degrees

I recently popped my clutch pedal off and greased the pivots. No more squeak.

...
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Old 05-11-2018, 07:41 PM   #3
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Default Re: Squeaky Clutch when Over 80 Degrees

Have you put a small dab of sil;icone grease on the push rod where it enters the master cylinder on the fire wall? Much easier than disassembling the pedal to lube the plastic bushings.

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Old 05-13-2018, 02:03 PM   #4
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Default Re: Squeaky Clutch when Over 80 Degrees

Quote:
Originally Posted by DEugene View Post
I've looked for remedies, and applied some of them
How many guesses do we get, to try and figure out which ones you've already tried, so we don't suggest them again?

...
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Old 05-14-2018, 03:34 PM   #5
DEugene
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Default Re: Squeaky Clutch when Over 80 Degrees

Thanks for the great advice everyone.... I would have never thought about using lubricants on it again for the dozen and a half times I've put every lubricant known to man on every piece of the clutch mechanism..... IF that was the problem, then it would happen basically at all temperatures..... this only occurs when the outdoor temperature is above 80 degrees and at no other time...... I just thought someone might have run into this problem before despite all the grease that can be put on it.

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Old 05-14-2018, 04:29 PM   #6
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Default Re: Squeaky Clutch when Over 80 Degrees

If it is not the boot squeaking you have to dismantle the assembly so the inside of the bushing can be cleaned and lubed.

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Old 05-14-2018, 04:43 PM   #7
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Default Re: Squeaky Clutch when Over 80 Degrees

Why does it only do it when it's over 80 degrees and no other time??

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Old 07-13-2018, 06:54 PM   #8
jasenpeters
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Default Re: Squeaky Clutch when Over 80 Degrees

Quote:
Originally Posted by OldNuc View Post
If it is not the boot squeaking you have to dismantle the assembly so the inside of the bushing can be cleaned and lubed.

Clutch Hydralic System - Annotated - SF.jpg

OldNuc, in the picture, what part needs cleaning and lubed?
Is it the part labeled Rubber Boot?

The "Plastic Housing" part is fixed to the unit pretty tight.

If it's the part labelled "Rubber Boot", that seems to be pretty tight inside
the plastic housing.

Can the plunger be removed to make it easier to clean and re-lube the boot?

Any advice is always appreciated.

...
Re-Animated: 2015-08-18, 220,497 + 21,000 Miles
1996 SC2 DOHC, Manual, 220k, 36mpg Hwy

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Old 07-13-2018, 07:32 PM   #9
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Default Re: Squeaky Clutch when Over 80 Degrees

Yes, take a q-tip and roll it in a finger full of Sil-Glide and then wipe on the rod in front of that rubber boot. Cover about 1/2" of the rod length al the way around.

Cheap dielectric grease will also work but not as long as the Sil-Glide. If that does not fix it then you will be dismantling the clutch-brake shaft and that requires removing the dash top cover and dropping the steering wheel to get it all apart unless you are real small.

Rod does not come out of the cylinder. The assembly can be removed from the firewall if you disconnect the rod from the clutch pedal.

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Old 07-13-2018, 11:04 PM   #10
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Default Re: Squeaky Clutch when Over 80 Degrees

Quote:
Originally Posted by OldNuc View Post
Yes, take a q-tip and roll it in a finger full of Sil-Glide and then wipe on the rod in front of that rubber boot. Cover about 1/2" of the rod length al the way around.

Cheap dielectric grease will also work but not as long as the Sil-Glide. If that does not fix it then you will be dismantling the clutch-brake shaft and that requires removing the dash top cover and dropping the steering wheel to get it all apart unless you are real small.

Rod does not come out of the cylinder. The assembly can be removed from the firewall if you disconnect the rod from the clutch pedal.
I found that the best way to get to the clutch and brake pivot rods is to actually remove the front seat and lay down on your back with your head under the dash. I am about 5'11" and 150lbs and it was not a tight fit at all, just need a few different size extensions and a deep socket, as well as some patience. Cooler weather helps too, I did it in a sealed up car at the jy in 90f heat, and it was not fun.

...
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1995 Sl2 5spd Manual Swap: 150,062
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Old 07-14-2018, 03:36 PM   #11
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Default Re: Squeaky Clutch when Over 80 Degrees

I tried everything under the sun to get my 98 to stop squeaking.

Finally I replaced the clutch master slave assembly, squeak gone...

...
2002 Silver SL2, manual, 5th gear swap (.605), 80,000 miles, black badges,
205/60R15 "H" rated tires, 5mm spacers rear...
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Old 07-16-2018, 10:33 PM   #12
jasenpeters
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Default Re: Squeaky Clutch when Over 80 Degrees

Update:
Tonight (July 16, 2018), I injected about 6 cc(mL) (0.2 oz.) of NAPA Sil-Glyde Lubricating Compound (from a 4oz. tube),
inside the boot of the clutch push rod / pedal mechanism located under the steering column and dash board of the car.

I used a 3cc syringe (w/ plastic tip for feeding small animals) and a 12" clear stiff plastic tube.
The long plastic tube was attached to the tip of the syringe.
This made it a bit easier to work under the steering column.
Clutch Hydralic System - Injection Tool - SF.jpg

The other side of the long tube was cut at a 45 deg angle (or more) so that it
could slip under the rubber boot where the boot meets the push rod.
Clutch Hydralic System - Injection Tip - SF.jpg

Make sure to inject with the clutch pedal pushed in. You can do it with arm strength.
This will guarantee that the lubricant contacts the inner walls where the inner plunger cylinder slides against.
Clutch Hydralic System - Injection Point - SF.jpg

After a 10 mile drive, there were no squeaks whatsoever.

I'll report any further squeaking, if and when it returns...

(All pix are from another unit I have, no need to remove the unit from the car.)

...
Re-Animated: 2015-08-18, 220,497 + 21,000 Miles
1996 SC2 DOHC, Manual, 220k, 36mpg Hwy

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Old 07-16-2018, 10:43 PM   #13
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Default Re: Squeaky Clutch when Over 80 Degrees

Sil-Glide is very handy stuff to have available.

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Old 07-16-2018, 11:35 PM   #14
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Default Re: Squeaky Clutch when Over 80 Degrees

Quote:
Originally Posted by OldNuc View Post
Sil-Glide is very handy stuff to have available.
Thanks to you, I have some left over from the re-build....

...
Re-Animated: 2015-08-18, 220,497 + 21,000 Miles
1996 SC2 DOHC, Manual, 220k, 36mpg Hwy

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Old 07-17-2018, 12:57 AM   #15
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Default Re: Squeaky Clutch when Over 80 Degrees

Quote:
Originally Posted by jasenpeters View Post
Update:
Tonight (July 16, 2018), I injected about 6 cc(mL) (0.2 oz.) of NAPA Sil-Glyde Lubricating Compound (from a 4oz. tube),
inside the boot of the clutch push rod / pedal mechanism located under the steering column and dash board of the car.

I used a 3cc syringe (w/ plastic tip for feeding small animals) and a 12" clear stiff plastic tube.
The long plastic tube was attached to the tip of the syringe.
This made it a bit easier to work under the steering column.
Attachment 53629

The other side of the long tube was cut at a 45 deg angle (or more) so that it
could slip under the rubber boot where the boot meets the push rod.
Attachment 53630

Make sure to inject with the clutch pedal pushed in. You can do it with arm strength.
This will guarantee that the lubricant contacts the inner walls where the inner plunger cylinder slides against.
Attachment 53631

After a 10 mile drive, there were no squeaks whatsoever.

I'll report any further squeaking, if and when it returns...

(All pix are from another unit I have, no need to remove the unit from the car.)
Thanks so much for this post! My clutch also squeaks like crazy above 80F. I had initially lubed the pedal linkage, but that didn't help at all. Then I tried applying some Teflon grease to the pushrod with it extended. I assumed that depressing the clutch would work itself in past the boot. No difference!

I was thinking I'd have to replace the clutch hydraulics, but the job is pretty nasty when it's hot outside and when it gets cooler, the problem completely disappears. Weird!?!

Looks like I'll need to get aggressive about injecting Sylglide behind the boot with the pedal depressed. Thanks for the new tip.

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Old 07-17-2018, 09:10 AM   #16
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Default Re: Squeaky Clutch when Over 80 Degrees

Great pictures! I hope the OP is still checking.
Quote:
Originally Posted by jasenpeters View Post
Thanks to you, I have some left over from the re-build....
Same here, thanks to OldNuc, I have all sorts of cool stuff left over that I use for various projects, or stuff that I will buy for new projects.

Syl Glide, acetone, Hylomar, etc.

...
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Old 07-31-2018, 06:57 PM   #17
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Default Re: Squeaky Clutch when Over 80 Degrees

Here's a handy youtube post of a squeaky/annoying clutch cylinder that was very similar to my issue. Again, my symptoms were the same as this thread -- issue only happened ABOVE 80F.

https://www.youtube.com/watch?v=IAgZyNLYN8A

I applied Sylglide twice. First time, I just injected it behind the rubber boot protecting the piston at the firewall -- but didn't depress the clutch halfway. No real change.

Second time, I first braced the clutch pedal against the seat frame with two boards and a clamp (made the pedal movement adjustable). Then I injected Sylglide with a small syringe and worked the pedal back and forth a few times. The problem was immediately cured.

I'll repost if the noise comes back, but if this means several summers of quiet shifting, it's well worth the time and saves time on the fun of replacing the clutch hydraulics.

THANK YOU JASENPETERS!!!!

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Old 07-31-2018, 07:18 PM   #18
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Default Re: Squeaky Clutch when Over 80 Degrees

Same exact scenario, here.

I never knew the temperature at which the squeaking started, but I know that it only happens on warmer days.

I think the "trigger temperature" on mine is a bit higher than 80. If it began squeaking anytime the temperature reached 80 I'd be hearing it half the year, here (which I'm, not).

I'm not too agile when it comes to laying on my back under the dash, so I'll just tune the squeaking out as it's more an annoyance than anything else.

If it causes a bigger problem, down the road, I'll have someone deal with it then.

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Old 07-31-2018, 07:19 PM   #19
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Default Re: Squeaky Clutch when Over 80 Degrees

hholbein: "THANK YOU JASENPETERS!!!!"

I stand on the shoulders of giants.....just payin' it forward

...
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