I have a 91 nissan d21 and cnt find the slave cylinder or master slave cylinder?

The slave cylinder allows you to shift gears. If you start the vehicle in gear, you can drive it. But you cannot come to a stop without killing the engine. You would be putting yourself in danger.

wow, sounds like replace part, rebuild kit



maybe just a gasket or seal


1993 nissan d21 master cylinder TO BOOSTER SEAL Google Search

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91 Nissan D21 Pickup Leaking From Behind the Master Cylinder

Sounds like clutch master is failing internally

`Did it bleed, did fluid come out in a steady stream? Isn't there a spring to bring the pedal off the floor?
Check the linkage of the pedal to rod to the clutch master cylinder, make sure that is all together. Any chance the master has an internal leak and won't build hydraulic pressure down at the slave? If you get it bled, then watch the slave operation while someone works the clutch pedal. The piston on the slave should extend and push the clutch fork enough to disengage the clutch.

There is a bleed valve on the slave cylinder that is on the transmission bell housing. Use an 8 or 10 mm wrench and loosen the valve, then snug it just hand tight. Now have someone depress the clutch pedal. As the pedal is depressed, loosen the bleeder and let air or fluid out. Close the valve as the pedal hits the floor, then repeat until a steady stream of brake fluid comes out of the bleeder as the clutch is depressed.

In many cases, the hydraulic clutch will gravity bleed when the bleeder valve is open. This is especially true if the fluid line from the clutch master cylinder (on the firewall) down to the slave cylinder is not bent up or around any objects, but is pretty much a straight drop down to the slave cylinder. If it won't gravity bleed by just opening the valve, have a helper work the clutch pedal as described. Remember to close the bleeder before letting the pedal up, so that air won't be sucked back in through the bleeder valve.

Check your clutch master cylinder's fluid,it's located under hood in right corner,if low or empty,then your slave cylinder is bad and leaking,it's connected to side of transmission.Here's a link. Repair Guides Clutch Clutch Release Cylinder AutoZone com Here's the part. Duralast Clutch Slave Cylinder 12425 1992 Nissan Datsun D21 Truck 2WD 4...

Your slave cylinder is located on the passenger side of bell housing held on with two bolts usually 12mm or 14 mm loosen hydraulic line then remove a push rod should come out of clutch fork re install. Add brake fluid to clutch master then there is a grease like fitting on it called a bleeder screw loosen to remove air from cylinder. most are gravity feed. if not have some one pump pedal and bleed under pressure.

It really sound like you are going to need a new clutch. If the slave or master cylinders were bad they would feel loose, a stiff pedal usually means something came apart in the pressure plate.

Was the slave cylinder bled correctly? If that's all set then that would leave the throw-out bearing and/or clutch assembly.