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Replaced hydraulic master cylinder and slave cylinder for clutch. Did a bench bleed on master cylinder and think I have the air out. Clutuch pedal still on floor and NO depression on throwout bearing. What does the little block by clutch master cylinder do? Where do I go from here?

Submitted: 64 days and 12 hours ago.

Category: Car

Value: $13

Status: CLOSED

Year: 1988
Make: Isuzu
Model: Trooper II
Engine: 4 cyl

Already Tried:
Slave cylinder was leaking. Replaced slave cylinder. Could not get the clutch pedal to come back. Setterment in master cylinder, so I replaced it. Bench bleed the master cylinder for the clutch. Bleed air from littl device on firewall that leads to slave cylinder. Believe I have bled the slave cylinder. Clutch prdal Still on floor. Tha slave cylinder is up to the point of putting pressure on throwout bearing and MOVES no further. Like there is a pressure relief somewhere. Where do I go from here?

Posted by chrytech 64 days and 12 hours ago.

Info Request

what year,make and model is your car?

64 days and 11 hours ago.

Reply

1988 Isuzu Trooper II

Posted by chrytech 64 days and 11 hours ago.

Answer

hello, it sounds to me like the new master or slave cylinder is faulty, where did you get them?

64 days and 11 hours ago.

Reply

NAPA

Posted by chrytech 64 days and 11 hours ago.

Answer

i personally i would take them both back and have them give you new ones and install them, its pretty much the only thing that can be causing this.

64 days and 11 hours ago.

Reply

My concern was I do not know what the flow thru device on the left fender is and/or what role it plays in the clutch system

Posted by chrytech 64 days and 11 hours ago.

Info Request

let me look and see if i can find that for you, i only have limited info that far back.

Posted by chrytech 64 days and 11 hours ago.

Info Request

does the piece look like the damper cylinder in the picture here?

View Full Image

64 days and 10 hours ago.

Reply

Not exactly. line from master cylinder in from the lower part, a bleeder screw at the top, the line to the slave higher than the incoming line with a 4 bolt cover. I removed the cover to expose. Inside a grommet that fits on a plunger type device. All I know

Posted by chrytech 64 days and 7 hours ago.

Answer

it sounds similiar the damper though is only supposed to be on v6 models though

63 days and 16 hours ago.

Reply

What effect does the damper have on the system
Pressure relief? Does it impact bleeding the system?

Posted by chrytech 63 days and 14 hours ago.

Answer

the damper absorbs some of the pressure when you release the clutch quickly, to keep the clutch from engaging sharply.

63 days and 13 hours ago.

Reply

Can the damper keep the pressure from building up at the slave cylinder?
Can the damper go bad?

Posted by chrytech 63 days and 13 hours ago.

Answer

yes and yes if for some reason that it has gotten a blockage it can, have you tried bleeding it at the bleeder screw at the damper?

63 days and 13 hours ago.

Reply

Yes and it seems to bleed OK.

Posted by chrytech 63 days and 13 hours ago.

Info Request

have you checked/bled it on the truck at the slave cylinder to make sure youre getting fluid to the slave cylinder?

63 days and 9 hours ago.

Reply

Yes. With the clutch pedel depressed I have pushed the slave cylinder closed while bleeding out any air. Then with the slave cylinder still fully closed had someone continiously pump the clutch pedel while holding the slave. After many, many, many pumps on the clutch pedal the slave cylinder will push up to the throwout bearing fork BUT will push NO further.

Accepted Answer

not sure then that youve bled it properly, your supposed to have someone pump the clutch pedal then hold it. then open the bleeder, much like bleeding brakes.

Accepts:
Expert:	chrytech
Pos. Feedback:	100.0 %
Answered:	9/20/2009

ASE Certified Technician

10+years experience in GM and chrysler

63 days and 6 hours ago.

Reply

Understand. BUT when you push on the clutch pedal it stays on the floor. NEVER any back pressure

Posted by chrytech 63 days and 6 hours ago.

Info Request

i understand i wonder still if its possible that you just got bad parts as i have never had this happen when replaceing clutch slave and master cylinders.

was the pedal like this before?

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Question

Replaced hydraulic master cylinder and slave cylinder for clutch. Did a bench bleed on master cylinder and think I have the air out. Clutuch pedal still on floor and NO depression on throwout bearing. What does the little block by clutch master cylinder do? Where do I go from here?

Optional Information

Info Request

what year,make and model is your car?

Reply

1988 Isuzu Trooper II

Answer

hello, it sounds to me like the new master or slave cylinder is faulty, where did you get them?

Reply

NAPA

Answer

i personally i would take them both back and have them give you new ones and install them, its pretty much the only thing that can be causing this.

Reply

My concern was I do not know what the flow thru device on the left fender is and/or what role it plays in the clutch system

Info Request

let me look and see if i can find that for you, i only have limited info that far back.

Info Request

does the piece look like the damper cylinder in the picture here? View Full Image

Reply

Not exactly. line from master cylinder in from the lower part, a bleeder screw at the top, the line to the slave higher than the incoming line with a 4 bolt cover. I removed the cover to expose. Inside a grommet that fits on a plunger type device. All I know

Answer

it sounds similiar the damper though is only supposed to be on v6 models though

Reply

What effect does the damper have on the systemPressure relief? Does it impact bleeding the system?

Answer

the damper absorbs some of the pressure when you release the clutch quickly, to keep the clutch from engaging sharply.

Reply

Can the damper keep the pressure from building up at the slave cylinder?Can the damper go bad?

Answer

yes and yes if for some reason that it has gotten a blockage it can, have you tried bleeding it at the bleeder screw at the damper?

Reply

Yes and it seems to bleed OK.

Info Request

have you checked/bled it on the truck at the slave cylinder to make sure youre getting fluid to the slave cylinder?

Reply

Accepted Answer

not sure then that youve bled it properly, your supposed to have someone pump the clutch pedal then hold it. then open the bleeder, much like bleeding brakes.

Reply

Understand. BUT when you push on the clutch pedal it stays on the floor. NEVER any back pressure

Info Request

i understand i wonder still if its possible that you just got bad parts as i have never had this happen when replaceing clutch slave and master cylinders. was the pedal like this before?

Related Car Questions

does the piece look like the damper cylinder in the picture here?

View Full Image

What effect does the damper have on the system
Pressure relief? Does it impact bleeding the system?

Can the damper keep the pressure from building up at the slave cylinder?
Can the damper go bad?

i understand i wonder still if its possible that you just got bad parts as i have never had this happen when replaceing clutch slave and master cylinders.

was the pedal like this before?