I have just bought a 1995 sunfire with a 5 speed, it starts right up and runs great but sometimes the clutch is fine and drives great and sometimes the clutch petal is hard as a rock and will not move running and not running. its a hydrallic clutch if it is a slave cylinder is it an internal or external. how much work am i looking at getting into?
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Unhook positive battery cable, the clutch cable or hydraulic slave cylinder to get the transaxle ready for removal. Secure your car in a safe position. Jack up the front. Stabilize engine with a jack below the oil pan. Remove the transaxle. Separate engine from the transaxle. Push transaxle away from the engine. Disengage the bolts around the pressure plate. Take it and the clutch disc out. Follow instructions for replacing the clutch. Take flywheel and old seal out. Install a new seal. Done! Know how to repair cars by http;//www.obd2express.co.uk
Check your motor and transmission mounts. Not much into the slave cylinder, but on hydraulic cylinders there is sometimes a run-out where the hydraulic pressure is too weak to do the job. This sometimes happens with the shaft leaking internally and allowing pressure to bypass the valving. But you have a different one, is it good?
Consider a shock absorber. The first push it can make, then it does not refill the void fast enough to make the second push. Because of engine reving, you jump from 1 to 2 quicker than 2 to 3 gear. The slave cylinder does not have enough time to refresh. Maybe look at the weight of the oil in the slave cylinder.
If the resivor is empty then when you push on the clutch it isn't disengaging allowing the engine to start. The best way to fix this problem is to install a new slave cylinder fill the resivor with fluid have someone push the clutch down open the bleeder valve to let the air out. close the bleeder valve release the clutch push down the clutch hold it to the floor open the bleeder let the air out close the bleeder and let up on clutch. continue doing this until you have a stream of fluid coming out of the bleeder with no air. after every 2 or 3 times check the resivor and fill as needed and dont run it out of fluid while doing this or you will have to start over. After you get a steady stream of fluid from the slave cylinder bleeder when you push on the clutch you will be able to feel the clutch disingage and be able to start the engine and drive.
You may have drawn air into the hydraulic line. Check the fulid level in the clutch reservoir. If it's low, look for a leak (usually it's the slave cylinder at the transmission that starts leaking. Please get back to me after your visual inspection for further advice.
the slave cylinder should have a "bleeder valve" on the outside
apply vaccuum with a special tool (vaccuum pump)
if you don't have that tool, open bleeder, and let the fluid drip out and
You probably have air in the system. You need to bleed the air out of the system so that it will disengage your clutch. The air in the system is compressing and, therefore, the slave cylinder can't reach the full extension.
Check all your hydraulic connections for seepage . If you find nothing leaking, check where the rod goes into the master cylinder under the dashboard...If still nothing, I'd change the master cyl, as it is likely internally bypassing and permitting the clutch to release. PS it takesa a special "touch" to shift gears without using the clutch, if you cannot do that don't drive it Till you get it fixed...you will damage synchros and will need to have trans removed and rebuilt. $$$you don't want to spend!!!