ZR8ED Posted April 29, 2008 Share Posted April 29, 2008 It looks like its another "while I'm at it" situation for me. I have finished the rear disc swap, and have found that a MC seal is leaking for the front brakes. Time to change the master cyl! While talking with a z buddy of mine he says "why don't you put in a 280zx MC " I'm like. "Ok good idea". Shucks darn it I did it again. Another project. It sounds like a fairly easy swap If you have all the parts. I ordered a rebuild MC for a zx, and I'm hoping that it will come with enough bits for the install. I hope it comes with the tanks! I'll find out this afternoon if this is going to be easy, or If I'm going to have to find a junker MC to get the missing pieces. Oh well! Maybe I'll clean up the brake booster while I have more room to work in that area! heeheehee Scott. Quote Link to comment Share on other sites More sharing options...
S30TRBO Posted April 29, 2008 Share Posted April 29, 2008 Scott, All I had to do on my 240Z was to re-bend the short lines as they are reversed compared to what the 240Z originally had. I am not 100% sure if you will need to do this on a 280Z. Also I would recommend: The gold thing on the right is the proportioning valve. Take off the large bolt on the bottom and take the guts out and replace the bolt. This will allow more fluid to flow to the calipers verses being necked down when it had drum brakes. It is easier to take it out and put it in a vice. You need small needle nose to pop the c-clip out then take the orifice (tube) out for good. Again this might be a 240Z thing just passing on what I went through. Quote Link to comment Share on other sites More sharing options...
TrumpetRhapsody Posted April 29, 2008 Share Posted April 29, 2008 If you get it from autozone, you'll probably be missing some stuff. When I got my reman S30 master cyl, it was ONLY the core cylinder. No reservoirs or clamps. Quote Link to comment Share on other sites More sharing options...
280Z Turbo Posted April 29, 2008 Share Posted April 29, 2008 I bought a new Beck-Arnley unit for $90. Worth every penny, IMO. Quote Link to comment Share on other sites More sharing options...
ZR8ED Posted April 30, 2008 Author Share Posted April 30, 2008 Got the unit last night. No tanks. But... I think the tanks off of mine will fit. I'll find out when I pull the old MC. I may get lucky here. I'll post the results. I ordered a MC for a 1982 280zx, and before I put my money down, I checked for a 1980 280zx MC, and it came up with the same part number. The reason for my initial concern is that in my 280zx FSM it shows it having 1 large tank, and my 1978 has two tanks. I'll find out for sure! Quote Link to comment Share on other sites More sharing options...
EMWHYR0HEN Posted May 1, 2008 Share Posted May 1, 2008 Make sure the reaction disc stays in place and don't forget to adjust rod length and pedal play. Quote Link to comment Share on other sites More sharing options...
ZR8ED Posted May 1, 2008 Author Share Posted May 1, 2008 Well Delays. I could not remove one single fitting. I could not remove the two on the MC, and I also tried to remove their respective other ends! Wrenches kept wanting to slip, and Vice grips were too large to get into that tight area. Sooo I stopped by a friend who suggested I use proper tools..ie line wrenches. He gave me a few, and a few crows foot wrenches as well. This should do it. I'll have that mc off today! Quote Link to comment Share on other sites More sharing options...
ZR8ED Posted May 2, 2008 Author Share Posted May 2, 2008 Ok Update on the master cylinder upgrade. I got the old MC off finally! A small pair of vicegrips were needed in the end to loosen those fittings. sheesh. What a job just to get the MC off of the booster. It had some silicone on the joint, and I had to work like a dog to get it to pop off. I cleaned up all of the parts I was going to reuse, and the actuating rod fits the new m/c with no adjustment required. Thanks for the tip to measure it first! I got the MC off, and yes my 280 MC tanks fit just fine on the 280zx MC. I got it all back together, and reinstalled the m/c It was not much fun messing with the hard lines getting it all lined up again. The 280zx MC bleeder nipples are on the opposite side as my 280z MC. The other brake lines did not need to be re routed, though I did need to reroute my brake bias controler slightly due to the mc bleeder nipples being on the other side, but that is my problem. To sum it up, I have it all back together, and I have not seen any leaks. I do not have the system fully bleed yet, but I have a friend coming tonight to help me make sure its bleed enough. Then its road test time, then to try and figure out the brake bias setting that I need. I am not looking forward to setting that up. I'll have to wait for a rainy day and an empty parking lot I suppose..at least till my clubs next track day! I'll post the final results to finish this thread off. Thanks, Scott. Quote Link to comment Share on other sites More sharing options...
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