1977 Clutch issue - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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post #1 of 5 (permalink) Old 03-30-2019, 10:31 PM Thread Starter
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1977 Clutch issue

Hey everyone, new to the forum! Anyway, I have a 77 280z and it has a brand new clutch, slave, master. I can not get this thing to bleed, I have tried gravity, bench gravity, vacuum, tried the put the hose on it and keep one end submerged, watched with my own eyeballs the bubbles come out and continued to bleed a whole quart of fluid through it just because the stuff coming out was pretty dirty. Any advice would be much appreciated, at this point I am thinking just starting from scratch with a brand new master all the way to the slave. It makes absolutely zero sense to me.
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post #2 of 5 (permalink) Old 03-30-2019, 11:10 PM
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Clutches can be very hard to bleed, I’ve always used a vacuum brake bleeder. Make sure all your lines are clear.
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post #3 of 5 (permalink) Old 03-31-2019, 12:26 AM Thread Starter
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Originally Posted by gr8gary View Post
Clutches can be very hard to bleed, I’ve always used a vacuum brake bleeder. Make sure all your lines are clear.
Its driving me up a wall, I was so excited when I finally got my wife to help and I could actually watch all the air bubbles come out I thought I was getting somewhere. I do however think when the shop put on the new stuff (long story) they put the wrong MC on because the rod is clearly to short and I adjusted it all the way out and its still over 1/2" short. I did read 70-79 had a longer one as well as I seen zcardepot has adjustable slaves, id imagine ill probably give those a whirl.
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post #4 of 5 (permalink) Old 03-31-2019, 07:30 AM
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You must have air getting back in. Did the pedal start to stiffen up after you bleed it and then later was bad again or is it never stiffening up.
You might have a bad line, cross threaded fitting but maybe a fitting that isnít tight. Also you could have gotten a bad MC. I bought might at Rock Auto and itís been fine.
I changed both the Clutch Master and Slave Cylinder on my 77. Did you prime both of them prior to installing?
I used a hand pump type bleeder. If you primed the master and slave prior then all you need to make sure all the fittings are tight, crawl under the car, attached the hose to the fitting and start pumping. Make sure someone is keep the reservoir full as you do this or it becomes a futile exercise. Bought this at Harbor Freight. Works pretty good.



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post #5 of 5 (permalink) Old 04-03-2019, 10:27 PM
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clutch bleeding

I have also gotten the clutch master with too short of a shaft. I finally order one from Zcardepot and theirs is correct. the adjustable slave was only on the early 71-72 Zs, after that they were all fixed. on the bleeding problem, I would change the hose also since you changed everything else.
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