2nd generation clutch problem. 90 3.0 with manual
May 24, 2004 | 01:46 PM
#1
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From: Arkansas
2nd generation clutch problem. 90 3.0 with manual
Here is my problem.
I have a 1990 Toyota 3.0 with a manual. It has a Centerforce dual friction in it with around 15000 miles on it. New pilot and throughout bearing if it matters. When you crank it the clutch is firm and has no problems. If you drive it for 15 minutes or so the clutch starts to get soft. In other words you push it and it is almost all the way to the floor before it works properly. If I take it out of gear and pump the pedal for 1 minute or so it is firm again. The clutch is not burning and it is grabing perfect. I know you are thinking check the fluid dummy. I did and the fluid is good. What could be causing this problem?
I have a 1990 Toyota 3.0 with a manual. It has a Centerforce dual friction in it with around 15000 miles on it. New pilot and throughout bearing if it matters. When you crank it the clutch is firm and has no problems. If you drive it for 15 minutes or so the clutch starts to get soft. In other words you push it and it is almost all the way to the floor before it works properly. If I take it out of gear and pump the pedal for 1 minute or so it is firm again. The clutch is not burning and it is grabing perfect. I know you are thinking check the fluid dummy. I did and the fluid is good. What could be causing this problem?
May 24, 2004 | 05:51 PM
#4
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Bleed it then bleed it again until you get tired of bleeding it. They seem to sometimes wanna be stubborn. My buddy recently put the same clutch in and we need to bleed it being he was whining the other day that it needs to be bled AGAIN. Hope you get er done!
May 24, 2004 | 07:32 PM
#5
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From: western Colorado
This could raise a question I have been interested in for some time now. Assuming you went with a heavier duty pressure plate at the same time, I have wondered about the stock master/slave cylinders' ability to handle the increased force required to make a heavier duty pressure plate work. Surely the increased tension in the "fingers" of the pressure plate would put more stress on the cylinders?? 
If so, it would be even more of an effect on old parts and likely result in pushing fluid past the piston and loss of hydraulic pressure.
I know when people go with bigger brake systems they go with bigger brake master cylinders. Why is the same not considered with heavier duty clutches? Granted, the amount fluid volume is unchanged unlike in brakes systems changes where there is an increased fluid volume, but maybe bigger pistons could push the fluid with less strain on the cylinders.
Who am I kidding....I don't know. Anybody have the 411 on this one?
If so, it would be even more of an effect on old parts and likely result in pushing fluid past the piston and loss of hydraulic pressure.
I know when people go with bigger brake systems they go with bigger brake master cylinders. Why is the same not considered with heavier duty clutches? Granted, the amount fluid volume is unchanged unlike in brakes systems changes where there is an increased fluid volume, but maybe bigger pistons could push the fluid with less strain on the cylinders.
Who am I kidding....I don't know. Anybody have the 411 on this one?
May 25, 2004 | 04:18 AM
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Originally Posted by Fahrenheit 451
This could raise a question I have been interested in for some time now. Assuming you went with a heavier duty pressure plate at the same time, I have wondered about the stock master/slave cylinders' ability to handle the increased force required to make a heavier duty pressure plate work. Surely the increased tension in the "fingers" of the pressure plate would put more stress on the cylinders??
If so, it would be even more of an effect on old parts and likely result in pushing fluid past the piston and loss of hydraulic pressure.
I know when people go with bigger brake systems they go with bigger brake master cylinders. Why is the same not considered with heavier duty clutches? Granted, the amount fluid volume is unchanged unlike in brakes systems changes where there is an increased fluid volume, but maybe bigger pistons could push the fluid with less strain on the cylinders.
Who am I kidding....I don't know. Anybody have the 411 on this one?
If so, it would be even more of an effect on old parts and likely result in pushing fluid past the piston and loss of hydraulic pressure.
I know when people go with bigger brake systems they go with bigger brake master cylinders. Why is the same not considered with heavier duty clutches? Granted, the amount fluid volume is unchanged unlike in brakes systems changes where there is an increased fluid volume, but maybe bigger pistons could push the fluid with less strain on the cylinders.
Who am I kidding....I don't know. Anybody have the 411 on this one?
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