brake booster boost valve

[m90daytona]

i was wondering about our brake boosters...since our cars arent meant to be boosted should we get a one way valve so we dont damage the seals in the booster or master cylinder? i know the tt stealths and 3000gt's have one so i thought it would be a good idea

[mwinkle353]

A vavuum tank will also be beneficial. My turbo car actually has a vacuum pump and a vacuum tank.

[Ondonti]

Is there a one way valve on turbododges?

[m90daytona]

Quote:

Originally Posted by mwinkle353 A vavuum tank will also be beneficial. My turbo car actually has a vacuum pump and a vacuum tank.

i am not so concerned w/ a vacuum pump or tank as the booster holds enough vacuum for a few brake applications. i am more worried about loosing boost or ruining my brake booster.

[c2xejk]

They put a check valve on older cars, turbo and non-turbo. I suspect they deleted it on newer cars simply because it causes more problems than it fixes... (ie. by icing shut...) I don't think you will have a problem, if you want to do something, switch to a booster off a turbo car...

[m90daytona]

Quote:

Originally Posted by c2xejk They put a check valve on older cars, turbo and non-turbo. I suspect they deleted it on newer cars simply because it causes more problems than it fixes... (ie. by icing shut...) I don't think you will have a problem, if you want to do something, switch to a booster off a turbo car...

they put the check valve in the booster? i could probably get an inline one, cut the hose and install it in between the intake manifold and the booster. save a lot of time and money. i really dont want to pressurize the brake booster because i think it will decrease boost pressure and hp.

[Ondonti]

We have the same brake booster as TD guys.

If they dont run a check valve then it cant be much of a problem.

[c2xejk]

The check valve was inline.

Considering the volume of the intake piping and intercooler on most setups, pressurizing a booster is insignificant... (plus the CFM being consumed by the engine...)

[charger R/T]

the plastic fitting on the booster that the vacuum line hooks to is a check valve. Pop it out of the booster with the engine off and you will see.
Tim

[DustyR/T]

don't people realize practically all vehicle have a check valve? It's not just to control vacuum in the booster but to hold vacuum if I'm not mistaken.

Try this...start the car and after a minute of running shut it off. Now try removing the check valve. It will be difficult because the vacuum is holding it inside the grommet. When you break the seal you will hear a large "whooosh" of air being sucked into the booster. This proves that the check valve "holds" vacuum in the booster.

[m90daytona]

it wasnt about 'holding vacuum' it was about not pressurizing the booster...this thread is 2mos old and the question was answered.

[DustyR/T]

Quote:

Originally Posted by c2xejk They put a check valve on older cars, turbo and non-turbo. I suspect they deleted it on newer cars simply because it causes more problems than it fixes... (ie. by icing shut...) I don't think you will have a problem, if you want to do something, switch to a booster off a turbo car...

Quote:

Originally Posted by Ondonti Is there a one way valve on turbododges?

Quote:

Originally Posted by Ondonti We have the same brake booster as TD guys. If they dont run a check valve then it cant be much of a problem.

I responded because clear enough points weren't being made about the purpose of the check valve and how it won't allow boost (pressure) to enter the booster (no pun intended) unless you're running serious pressure. It wasn't stressed at all that removing the check valve would be very bad and dangerous-which is also why I responded to this.

Comments like c2xejk's above are assumptions that some people would take seriously. Saying this, "I suspect they deleted it on newer cars..." to a new inexperienced member who might actually remove his check valve because it is "beneficial" or "insignificant" would be a disaster. They did not delete it on newer vehicles to my knowledge. I see new 06 and 07's every day and never recall seeing a missing check valve on the booster.

[RoadWarrior222]

Anyone got a source for those check valves, I've had 2 go on me (non-boosted), and I've had to pull them at wreckers because the dealers and parts places don't have a frigging clue what I'm talking about. Or is it meant to be an integral part of the booster assembly or something?

[charger R/T]

Quote:

Originally Posted by RoadWarrior222 Anyone got a source for those check valves, I've had 2 go on me (non-boosted), and I've had to pull them at wreckers because the dealers and parts places don't have a frigging clue what I'm talking about. Or is it meant to be an integral part of the booster assembly or something?

Whats wrong with the car that makes you keep replacing them. They rarely fail. They usually come with reman boosters. Could your booster be an issue? A dealer should be able to get one for you.
Tim

[RoadWarrior222]

Heh, mebbe should have mentioned it was on 2 different vehicles. I figured it was age or something. Boosters are solid, they were just leaking back through the check valves, "new" valve from the wreckers cured it, dealer looked at me wierd when I wanted one.

Edit: Come to think of it, the dealer has looked at me wierd when I've wanted just about anything I couldn't get at regular parts store.