Tree_Stump

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?

Steve260Z74

Explain what you mean by different. There are left and right side cylinders.

Tree_Stump

They are two different parts. I was wondering if they should be the same part?

NismoPick

Again... different compared to what??? Left cylinder to right cylinder? Different pistons on each side of the cylinder? What?

Help us help you...

Pics?

Tree_Stump

Yes the right wheel cyilnder compared to the left?

Tree_Stump

This is the left one

Tree_Stump

And this is the right one

Steve260Z74

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.

Tree_Stump

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.

Steve260Z74

That's not a bad guess.

zzznuts

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

zzznuts

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.