nissannick

1993 mazda rx7 type r

Getting it ready for the new season because I dont winter drive it. Put a new battery in and went to start it up but the clutch pedal went straight to the floor. No pressure. The clutch was fine before winter. What could cause it to do this?
Thanks

Mahjik

iTrader: (1)

Check the brake fluid reservoir (front and back as there are two chambers) and make sure it's full. Also check under the car and see if you have any fluid on the ground. If you don't have any fluid missing from the reservoir or on the ground, then likely the clutch master cylinder has failed.

nissannick

Brake fluid reservoir is just above the minimum line.
Cannot see any fluid underneath the car.
How does the master cylinder fail when i havent driven it in months? It was working fine when i parked it. Ugh what a headache!
Thanks.

papsmagu

iTrader: (19)

if it is your master make sure you replace the slave at the same time. just look at it this way, better that if fails in your garage than 50 miles from your house!

Mahjik

iTrader: (1)

The first thing you can try is to put it up on jack stands, then open the inspection cover and verify everything looks good mechanically. If that checks out, bleed the clutch and see if you can build any pressure into the system. If you can't the clutch cylinders are done.

nissannick

There is an inspection cover on the master cylinder? Sorry I know nothing about the clutch system. Any heads up on how big of a job it is to change the master cylinder?
Is there a seperate master cylinder for the clutch or does it run off the brake master cylinder?
Where are the clutch cylinders?

Mahjik

iTrader: (1)

I would suggest you either download and take a look at the Factory Service Manuals (FSM):

https://www.rx7club.com/3rd-gen-archives-73/tech-manual-directory-614824/

or tow the car to a competent shop.

nissannick

Thanks for the FSM link that helped alot. So now that i kinda know what im looking at...

I tried to find the parts today, none ANYWHERE in canada. Ugh but thats a seperate problem.
Im going to try and bleed the clutch and hope that air somehow got into the lines. Ill let you know how that goes. Thanks for the help.

pito13b

iTrader: (3)

Look at the rod that attaches to the clutch pedal. Follow it to the master. When my master went it was all moist with brake fluid at the front, and you could lift the pedal and watch the piston come back up real slow. Like papsmagu said, purchase both master and slave. Does Ray Crowe ship to canada? Thats where I got mine and at the time he had a sale on both. These are wear items, when they go they go. At least it happened to you in the garage. I had 1 master and 1 slave go out in different cars that left me stranded on the side of the road.

nissannick

Yea i am thankfull that it atleast happened at my house... still a **** off though.

Update, filled the master cylinder resevior because the clutch side was almost empty. Could this cause air to get in the lines and cause the problem?
If thats the case a clutch bleed should do the trick?

Ok thanks pito, i will definatly check that out.

Does anyone know how this could happen while the car is being stored? How could the master cylinders seals deteriorate so quickly when it is not even being used?

nissannick

by the way how much did both of those cost you? and was it the complete assembly or just the repair kit?

Mahjik

iTrader: (1)

nissannick,

I'm not trying to be a jerk, but you can answer most of your own questions just by doing a little research or trying things out. Here's idea for the cost of the clutch cylinder parts:

http://www.mazdatrix.com/f-hydral.htm

As for the fluid, if you are low on fluid it went somewhere. So even filling it up and bleeding it may not be the ultimate solution even if it works. However, that is free aside from the brake fluid which you'll need anyway so why don't you just try it?

nissannick

Alright thanks for the help.
I found out how to change the master and slave. Doesnt look to bad.
Getting the parts will be the hardest part.

Alright ill keep you guys posted and let you know what it was.

Saks_RX7

Nissannick I see your from Edmonton. The Mazda dealership here in Sherwood Park is decent at being competent so if you need parts check with them. That is unless you fixed the problem already. If you did tell me how you did it because mine has the same problem.