Question about 1991 Toyota Pickup

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Hilux clutch master cylinder seals which way do the seal or seals face.

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The seals face towards the hydraulic side. Install with the wide side of the seal towards the hydraulic line. Note: it will not bleed like a brake system. Fill the resivoir and open the slave bleeder and gravity bleed, that will get you about 90%. Then get somebody to step on the pedal while you ,now, bleed it like a brake system. Good Luck!.

Posted on Jun 29, 2009

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1987 Nissan civillian diesel 4cyl clutch slips when hot gears hard to change power gear changes ok leaks oil from bell housing drain hole when hot what could be wrong (clutch and pressure plate .?


it is hard to diagnose with so many listed faults
first up slipping when hot indicates a weak pressure plate tension but the reasons o slipping when hot may start at a bad clutch master cylinder not fully allowing the brake fluid back to the reservoir ( blocked compensating port)
that creates a catch 22 situation where the pressure place is not fully engaged and so it slips marginally and that builds up friction heat which in tern cause what is called brake fade . In other words the friction surface ( clutch plate facing) cannot absorb any more heat and so it slips
moving on , the slippage can be from excessive oil on the linings but if that is the case it will slip or grab ( shudder) on take off
The oil will most likely be from from a front input shaft seal and that may be from failing oil seal or overfull transmission or blocked breather for the transmission
seal generally will produce a oil mist in the bell housing after time but adding to your statement of hard to get/change gears I suspect that the oil leak could be from a failing front shaft bearing of the transmission not allowing the seal to work properly
To sum up , the transmission will have to come out and the clutch kit and throwout bearing replaced
from the slippage I would recommend that the flywheel clutch face be machine to remove high hot spots and that combination will give a smooth clutch operation at this point if there are signs of a rear main seal leaking , replace it before the flywheel is refitted
remove the extension housing that the throw bearing slides on and the seal is in that housing
that front bearing can be checked also and if in doubt , overhaul the bearings in the transmission
(visible damage to the bearing cage will be evident here indicating a failing bearing)
when finished replace the clutch master cylinder if more than 5 years old since replacement
sorry not good news and it will amount to a costly exercise but there are no short cuts to a good reliable jib

Jun 06, 2017 | Nissan Cars & Trucks

1 Answer

What's wrong with my clutch if my 1998 escort won't go into gear. There is small resistance in my clutch pedal


Jamie, are you losing any fluid from the clutch master cylinder? By small resistance I presume you mean the pedal feels soft?

If you're losing fluid from the master cylinder you have an obvious leak somewhere and air is getting into the system.

Most leaks occur from the clutch SLAVE cylinder as it does all the work .. If there's no leak from the clutch slave cylinder, suspect the seals inside. It's like a bicycle pump ..the seal inside wears and it won't pump..

You may be able to get an overhaul kit. I'm in the UK .. but here's an Ebay link for a slave cylinder overhaul kit just to show you what it looks like:
FORD CORTINA MK2 CLUTCH SLAVE CYLINDER REPAIR KIT SP2085
Here's a link to show you what the slave cylinder itself may look like (it may NOT be for your vehicle..)
CLUTCH SLAVE CYLINDER FORD FIESTA ESCORT
It's easier and quicker to fit a new slave cylinder than it is to strip down and replace seals with a kit. Be aware, after overhauling or replacing a slave cylinder you have to bleed it - remove the air.

The easiest way of doing this is to make sure the reservoir is fill of fluid, crawl underneath the car with a spanner/wrench, place a rag over the bleed point and get somebody to pump the pedal a couple of times while you undo then tighten the bleed nut.

If it's not the slave cylinder at fault- then it's the master cylinder. Master cylinders also have a 'piston' and rubber seals which wear/perish.
However, it's more than likely that it's the slave cylinder at fault

Mar 21, 2016 | Cars & Trucks

2 Answers

Does Toyota hilux R150 gear box have a clutch adjustment ?ie master cylinder adjustment ?


If it is adjustable it will have a threaded push rod at the slave cyl ,bleed the hydraulic system first adult the clutch then bleed again .

Oct 26, 2015 | Toyota Cars & Trucks

1 Answer

Won;t start while clutch pressed but will push start


The clutch master cylinder must have gone out, the seals in it have failed. The clutch master cylinder (next to the brake master cylinder) gives you hydraulic pressure so the clutch pedal can operate the clutch.
You can buy a new clutch master, a rebuilt unit, or yours can be rebuilt with new seals. Save time and money and buy a rebuilt or remanufactured unit. Once installed, you bleed the system down at the clutch slave cylinder, mounted on the transaxle.

Jul 15, 2013 | 1989 Honda Prelude

1 Answer

92 mazda miata new clutch new clutch master cylinder systems been bled several times clutch will work 4 awhile park car then try again and clutch quits working again, while driving clutch works fine 4...


Sounds like the seal in the new clutch master cylinder. I've seen that same problem in the hand brake system in small 2 and 4 seat airplanes. ( I'm and aircraft mechanic) The problem is not air in the lines so bleeding won't help. The piston seal is intermittantly failing to seal. That is whty the function can return without any apparent reason as the seal has seated itself. The only cure is to replace or rebuild the master cylinder. ( Yes, even new or rebuilt ones can have a defective or improperly installed piston seal)

Hope this helps

Aug 11, 2010 | 1997 Mazda MX-5 Miata

1 Answer

The seal between my master brake cylinder and vacumn assist leaks


u need to replace brake master cylinder is leaking from the seal behind the master cylinder assy easy to replace

Mar 28, 2010 | 1993 Ford F150 SuperCab

1 Answer

Clutch master cylinder top up and bleed


Oh dear the freelander has a sealed clutch master/slave cylinder the parts comes as a single master cylinder pipe and slave cylinder unit all in one . They are sealed from new and can not be serviced try ebay

Mar 07, 2010 | 2002 Land Rover Freelander

1 Answer

Repair master clutch cylinder on a 92 300zx


You should be able to buy a rebuild kit for the cylinder, I would rebuild the slave and master. just take it off, take the snap ring off and remove the piston, make a note of which direction its facing, the new one may come with a piston with the seal aready installed.The cup will have the flare facing forward. Just put the new seal on/ or piston in and reseat the snap ring. The slave is just as easy. then you want to bleed all the air out. Fill master cylinder and open the slave bleeder screw, just let fluid come out until all the air bubbles quit. that should bleed it. If the pedal dosent feel right, you may need to have another person depress the pedal and then open the bleeder.

Oct 24, 2009 | 1992 Nissan 300ZX

1 Answer

Clutch fluid is leaking inside of the car 240sx


You need to rebuild the seals in the cluth master cylinder. The seal around the pedal shaft that actuates the clutch is leaking fluid past the seal and onto the shaft connected to the pedal, inside the cabin. 
A good parts store should be able to get you a seal rebuild kit, or remove the cylinder and bring it to a clutch shop or Nissan dealer and have them rebuild it for you. This is cheaper than dropping the car off and having them do all of the work. 
Dismantling the master cylinder, replacing the seals, filling the system with fresh fluid and bleeding it should solve your problem. Be sure to replace all of the seals at one time, and don't be tempted to only replace the one that is leaking at the moment. They should all be the same age to last without further leaking. Otherwise you'll be chasing a series of problems with your clutch as the other old seals fail over time.
Hope this helps.

Dec 19, 2008 | 1990 Nissan 300ZX

2 Answers

Clutch or master problem?


CHECK FOR ANY LEAKS STARTING AT MASTER CYLINDER THEN CHECK SLAVE CYLINDER AT G/BOX IF OK THEN BLEED CLUTCH MASTER CYLINDER OR SLAVE CYLINDER MIGHT HAVE WORN SEALS IN THEM THOUGH SO PARTS MIGHT NEED REPLACED.

Dec 16, 2008 | 1993 Nissan 240SX

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