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78 280z drum brake question?

Old 06-05-2014, 12:49 PM
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78 280z drum brake question?

I'm new to z cars and just picked up a 280z for $600. The back drum brakes where stuck. I took off the drum and what tearing them apart. I noticed that the wheel cylinders where different and was just wondering for that's normal for the 78 280z or should that be the same part?
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Old 06-06-2014, 03:22 AM
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Explain what you mean by different. There are left and right side cylinders.
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Old 06-06-2014, 11:05 AM
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They are two different parts. I was wondering if they should be the same part?
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Old 06-06-2014, 11:21 AM
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Again... different compared to what??? Left cylinder to right cylinder? Different pistons on each side of the cylinder? What?

Help us help you...

Pics?
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Old 06-06-2014, 11:47 AM
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Yes the right wheel cyilnder compared to the left?
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Old 06-06-2014, 11:53 AM
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This is the left one
Attached Thumbnails 78 280z drum brake question?-image.jpg  
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Old 06-06-2014, 11:55 AM
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And this is the right one
Attached Thumbnails 78 280z drum brake question?-image.jpg  
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Old 06-06-2014, 12:52 PM
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I erred earlier. The FSM shows a wheel cylinder only like the one you pictured in post #6. I verified part numbers and found only one for the wheel cylinder. This applies to 77 & 78 Zs.
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Old 06-06-2014, 01:56 PM
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So does that mean the guy before me must have messed around with the drum brakes? I just don't understand why they would be different.
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Old 06-06-2014, 02:57 PM
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That's not a bad guess.
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Old 12-30-2015, 08:13 PM
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Post #6 (1st photo) is correct for left or right side wheel cylinder on a 1977-78 280Z. The lower photo was the earlier style which used a different wheel cylinder for left and right sides. New 77-78 Datsun Z wheel cylinder:


https://zcardepot.com/brakes/rear-br...80z-77-78.html
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Old 12-30-2015, 08:16 PM
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Somewhere in the past an entire assembly may have been pulled off of another car (earlier 70-76). It should work if you replaced all hardware, shoes & wheel cylinder.
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