I just took my 86 rx-7 out of storage today. It started right up.
Anyway it drove excellent with the exception of right rear brake grinding while stopping.
The strange thing is there was no grinding at all before storing it.
I checked the condition of the rotor it was only slightly grooved not bad at all. But, there seemed to be a bit of rustiness in one area of the rotor.
Could the rusted area be the source of grinding? Or could it be due to a caliper slightly binding due to sitting for so long?
Man I love this car, I've been driving my work vans and my wifes mustang all winter. And even after taking my 350Z out of storage a couple times, there is nothing quite as satisfying as winding out a rotary.

 

That grinding could just be rust being rubbed off of the brake or your caliper has seized up. Drive it a bit more and see if the wheel is hot beyond what is normal. If so, you need to replace/rebuild that caliper.

 

did you store it with the e-brake on? your cable / caliper might be siezed. you should park it with the brake off for long periods. and just use bricks or something to hold it.

 

I'm hoping it is just surface rust. I just drove it about 9 miles home from the storage place. I tested the temp of all the rotors they were all hot to the touch but not sizzling. I'll probably take it in to the brake shop ASAP unless sound stops on the way there. I'm also thinking about taking a belt sander to the rotor with alot of rust on it before go anywhere.

 

Nope, I only had it in gear. The only time I use the ebrake is when I'm parked on an incline. I'm thinking corrosion hopefully on the rotor and not on the calipers. I'm thinking if it's on the calipers they should stick and grind for a while after the brakes are released.

 

You could just disconnect the e-brake cable at the caliper. Thats what I had to do to one wheel after replacing the rotors.