SpaniardV6

Hi there!,

I have a dude about my rear drum brake system on my V6 3.1L.

On my dashboard, the brake light is now ON.

Today, was doing the inspection of my car, and the inspector noticed me that's the rear drum brake doesn't work nothing. When I say nothing, is nothing. 0.00% load is detected when push the pedal.

The e-brake, works perfect.

I was reading and searching information about this problem, but I can't found any case like mine.

I will replace the brake cylinder of each drum, and rear brake hose. Is there other any part thats can be cause this problem?

I read about prop valve, and I think this must be the last thing for replacement.

Sorry for my bad english, so many time without practice and I don't wanna use google translator!

Thanks you, regards.

SpaniardV6

A pic of my bird, this was very dirty because the last rain.

Now put the original alloy rims, black matte painted, and new wheels.

novaderrik

are you getting pressure to the wheel cylinders?
are the shoes adjusted out so they are just barely hitting the drum without the brakes applied?

-=Z28=-

iTrader: (3)

Dont they self adjust?? Or shouldnt they??

sofakingdom

iTrader: (1)

Rubber hose from the car body to the rear axle, at the center of the car, top of the rear axle

Replace it

bryan623

Meh... Just pinch them off and keep the cable for the E-Brake. Rear Drum brakes don't do **** anyway. Your front Disc does all the work stopping your car.

novaderrik

rear brakes do more than you think- even when they don't do much- and i get the impression that he lives in an area where they want to see that all 4 brakes work before allowing the car to be registered and driven..

pinching off the line is a good way to become the brakestand king of your town, but i don't want to share the road with anyone that would disable the brakes on their car just because they are too stupid/lazy to figure out why they don't work..

regarding the self adjusting of drum brakes: they only do that if you actually use them to come to a stop in reverse, and only if the star wheel isn't seized up..

SpaniardV6

I get from rockauto the 2 wheels cylinder and the rear rubber hose and hope it arrives ASAP.

When jack the car, and push the brake pedal to the floor, you can spin the rear wheels without any inconvenience.

I think must be the rear rubber because the fronts brakes works really very good.

Can't drive the car without rear brakes because I'm importing the car from Germany and must passed the Technical Automobile Inspection :-\

Thanks for yours replies, I love this car and any thirdgen

-=Z28=-

iTrader: (3)

The rubber hose will split internally, causing one layer of the hose to block the line.

The front 2 rubber brake hoses that run to the front calipers are known to do the same.

SpaniardV6

I'll replace all brake hoses, and I hope pass the inspection and run with this machine soon.

My brother have a Trans Am from 1985, and now have problems with the fronts brakes, dont have too much power. We get from rockauto the fronts and rears hoses for this car.

He have a lovely red Trans Am with Camaro chrome rims. I asked him about this forum but he only speak spanish and german, anyway when he send pics of his Trans Am I'll upload here!

drdave88

iTrader: (3)

The reason the park brake will work is because you are using a lever to move the brake shoes out toward the drum, there is no hydraulic pressure being used to push the shoes.
You need to make sure they are properly adjusted as well and the star wheel adjuster is functioning properly or they will never adjust. Are you doing the work yourself or having it done somewhere? Depending on how old everything is, I would recommend a whole hardware kit, that way you know everything is working properly.

Steve Mack

iTrader: (5)

The proportioning valve on these cars aren't the best.You have something like %80 front %20 rear pressure.I had my rear tires on ramps at the paint shop.The owner tells me to slowly drive off of them.so I was creeping of the ramps.The owner comes up to me and tells me the ramps shot out from under the rear.I put a stronger spring in the rear brake part of the prop valve.I believe DRDave88 sent it to me.It works better.The best fix is to buy the 1LE prop valve.or put in an after market prop valve in the rear brake line .That way you can adjust your rear brake pressure.

SpaniardV6

ok!, ASAP will get a new prop-valve, this was new for me, because I don't know this part until have this brake problem.

yesterday arrives the package from rockauto, but when trying to disconnect the brake hose, the old nut are in very bad state, I can remove one, but the other was very very rusty, and when use the tool for remove, i broke the nut

i'm looking for buy the brake line to the drum, but only found it:




I only need the little line, rear left.

But I see it don't makes international shipping for this part.

I'm looking for thats inside Rockauto, but can't find it, do you know where I cant locate this part?

Trying too inside Summit Racing

Any suggestions?

Thanks you!

SpaniardV6

I just bought through eBay this used part, but if I can get new, prefer new tube lines.

Thanks you!

LiquidBlue

Good info over here: https://www.thirdgen.org/forums/brak...e-upgrade.html

Steve Mack

iTrader: (5)

I put my rear end up on jacks before I changed the spring in prop valve.I applied the brakes and the rear wheels kept turning.I put the stronger spring in and it stopped the rear wheels perfectly.That is one of the best threads on hear LiquidBlue.It should be made a sticky.

LiquidBlue

By reading thru that thread, I'm getting the impression that the heavier spring upgrade is primarily for rear disks. Seems like most on that thread had rear disks.

SpaniardV6

Hi guys!

Thanks you for all your replies.

The package with the parts come to my city the next week, I get new tools, and jack the car, and try to remove the broken nut, and yeah, I remove it with this tool:

http://files.stanleyproducts.eu/Cata...12013_prev.jpg

And use a very really good spray before try to remove, leave it about 30 min

http://medias.norauto.es/images_prod...n-1-250-ml.jpg

When remove the rear hose, there is no brake fluid, anything! there is no fluid in the input and in the double exit (one for each wheel).

Of course, I think about the proportioning valve, but when remove the fuel pump liquid cover, there is a very low level on the principal recipient, and in the lower recipient, there is nothing of fluid.

Yeah, I'm stupid, I get parts, remove the parts and replace it, and the problem appers like there is not brake fluid...

I was confused with the other Pontiac, I was sure of view the brake fluid (yeah, I look it, but into the other Pontiac... :\\).

http://i.ebayimg.com/00/s/NDcyWDUwMA==/z/gMEAAOSw4bVTl~ZE/$_35.JPG

You can see this pic, and the left part of liquid I think its for front wheels, and the right part of liquid, its for rear.

So stupid!!!!!!

I put new brake fluid, but the brake light on the dash persist (battery was removed one week).

I start the engine, and accel and push brake some times, but liquid level is in the same position (same level), before start engine.

I think can be too many air into the rear brake system.

How I can bleed the system? can be using the proportioning valve or need to remove drum cover?

Thanks you.

PS. I'm not stupid, but was confused with the other Pontiac thats I have, and too many works problem in my personal life, and problems with my woman (ex). I make a very bad mistake with my car, I hope he don't hate me

SpaniardV6

Searching into the forum I found this pic, I can see the nut for bleed the brake system, I'm going to try it with any friend can help me today.

Love this forum!!

Thanks you

SpaniardV6

After a good day, the car is now braking perfectly!

Lost the brake fluid because the rear hose have some fissures/cracks.

When replace the new hose, refill the brake fluid, and bleed the system.

Tomorrow I will go to the Inspection, and hope the rear brakes works perfectly!

Thanks you for all your replies, If pass the Inspection, will post so many pictures of the bird with the Renault Clio Sport of my friend (little car, and so many HP, 182hp), very fast car
, but not pretty like birds