Clutch issue AGAIN! (Page 1/3)
stevep914 DEC 07, 07:21 PM
Last week driving my 86 2.8 5 speed, the clutch pedal went to the floor, and I was stuck in 2 cnd gear. Thankfully, made it home to the garage without incident. I assumed the line between the master and the slave had blown, and I was correct; a leak right where the line curves around the floor drivers side, about two feet from the master. I put in a line repair, and then tried to gravity bleed the clutch system. Nothing is getting through to the slave. So I undid the repair to check if it was blocked anywhere, and it is not. However with the master reservoir full, no fluid exits where the line is broken, even when I pump the pedal. The master cylinder is a new replacement less than 200 miles ago on the car. Everything looks normal, but the master is not doing what it is supposed to do. When I first cut the line, hydraulic fluid did come out of the line where it is severed. So????
1985 Fiero GT DEC 07, 07:32 PM
That is weird, what does the pedal feel like as you press it, normal weight, super light out super hard?
stevep914 DEC 07, 08:53 PM
The pedal has no resistance at all, no mater how many times I push it. The reservoir remains full.
stevep914 DEC 07, 10:51 PM
As the clutch m/c reservoir was empty after the line blew, would I have to prime (bleed the master) in order to get fluid flowing?
jelly2m8 DEC 08, 01:28 AM
No, the Clutch master cylinder should flow fluid freely. Did you flush the clutch line before the previous replacement? perhaps there's foreign mater that worked its way making a restriction.
Frenchrafe DEC 08, 06:39 AM
You may have to pressurise the clutch master cylinder reservoir to get the fluid to move and correctly fill the slave cylinder.
I do this with a homemade lid and a foot pump.
Gentle pumps; not too much!
I've never managed to bleed this system properly without having first chassed out all the air.
Be carefull to refill the little reservoir often, if not you will just have to start again.

Regards,
Rafe

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"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France! @turboslugfiero
https://youtu.be/hUzOAeyWLfM

[This message has been edited by Frenchrafe (edited 12-08-2023).]

Vintage-Nut DEC 08, 09:18 AM
Bench Bleeding a Master Cylinder

I always start fresh by bleeding the master cylinder on the bench that removes air from the cylinder before it is installed in the vehicle.

This process can save time and effort compared to bleeding the master cylinder on the vehicle.

EDIT: IF you doubt the MC; bench bleeding will show you that it is working or not. Check out videos online that shows the steps if this is the first time......

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Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

[This message has been edited by Vintage-Nut (edited 12-09-2023).]

jelly2m8 DEC 09, 01:40 AM
Do not bench bleed a clutch master cylinder, you very well may damage it. If it does not gravity bleed, it's damaged / faulty.
Vintage-Nut DEC 09, 06:12 AM

quote
jelly2m8:
Do not bench bleed a clutch master cylinder, you very well may damage it.



"Different Strokes for Different Folks"
sleek fiero DEC 09, 10:49 AM
Jelly where did you get the idea that bench bleeding the MC would damage it ? Not bench bleeding is more likely to damage the MC as you can get an air lock causing problems to bleed . sleek