What is this part called?

[MisterB]

Took the truck for a test drive today. It's no better and no worse than before swapping out the filter. It probably just filters out any gases from entering the booster better now. I must have some air in my brake lines

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[C10MixMaster]

Looks like what's inside of a charcoal canister and I believe that adds weight to my theory. We ALL know those deals go bad.





These posts appear to contradict?
Respectfully, perhaps you will like to clarify.

Where is Thomas Dolby when ya need him?

If you are to have cake, you may not also eat it.
Not even in the name of science!

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sorry i realize some of explanations are as clear a mud at times. I will try to clarify a bit.

let's look at the booster in two different modes of operation

first your foots not on the pedal brakes are not applied , at this stage the booster is a sealed system has vacuum from the engine but nothing is happening. there is no air flow basically a sealed system at this time.

second mode you hit the brakes, as you press the brake pedal it opens a valve creating a vacuum leak, Air enter the booster from the area surrounding the the input rod under the dash . so in this mode we have a controlled vacuum leak.

so during braking dirty air from under the dash enter the brake booster, goes through the booster , through the check valve , through the filter and then to the engine .

this filter protect the engine not the booster.

i hope this helps

 

[C10MixMaster]

Also, it seems like these filters were primarily only installed on RWD GM products and maybe only carbureted too.

...gonna look into this out of curiosity.

ive seen them on TBI cars n trucks

 

[Rusty Nail]

I must have some air in my brake lines

Full stop.

What?

Why?

Is this new?

 

[Rusty Nail]

i hope this helps

Much better thanks. That is exactly how they work. If you drive around CEMENT MIXERS , it's no stretch to believe you know a thing or two about brakes.

"Protects the engine, not the booster." THAT is what we're looking for. Adds weight to my theory. A clogged one would back crud into the booster and negatively effect engine vacuum, working the valve stem seals..hard to get around that i'm thinkin. More research is necessary.
Your experience is valuable. Thanks for your input MixMasta

 

[MisterB]

Full stop.

What?

Why?

Is this new?

Lol. Maybe I made that sound a lot more dramatic than it is (or you're just taking it that way). Sometimes for the past 5 months or so, the brake pedal feels like I have to press a little harder to stop. If I let off and press it again, everything feels like it should

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[Rusty Nail]

Sometimes in the last FIVE MONTHS?!

Dude!

You have failed to mention underlying problems.../smh. Doesn't that invalidate any previous testing? Why yes, it does . Hrm?
Hmm.

A problem caused by "air" insn't gonna come and go..what do you mean sometimes?


Ugch I gotta get ready for work. Talk amongst yourselves.

 

[bucket]

ive seen them on TBI cars n trucks

Ok so after looking around...

My squarebody trucks have the filter, including the '88 TBI one.

My '90 C1500 TBI does not have one.

My '92 TBI Camaro does have one, but interestingly, my Tuned Port Camaros do not have a filter.

None of my Celebrities have one, they are multi-port V6 cars of varying years.

So with all that, I still can't figure out what types of vehicles got the filters. It would seem that it was only the carb and TBI vehicles that got the filter, but my '90 ruins that theory.

Also interesting, my '84 still employs a filter. I could have swore I removed that thing when I did a bunch of other work under the hood. I guess I lied earlier, lol.

 

[MisterB]

Sometimes in the last FIVE MONTHS?!

Dude!

You have failed to mention underlying problems.../smh. Doesn't that invalidate any previous testing? Why yes, it does . Hrm?
Hmm.

A problem caused by "air" insn't gonna come and go..what do you mean sometimes?


Ugch I gotta get ready for work. Talk amongst yourselves.

Oh my God. Relax

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[MisterB]

Sometimes in the last FIVE MONTHS?!

Dude!

You have failed to mention underlying problems.../smh. Doesn't that invalidate any previous testing? Why yes, it does . Hrm?
Hmm.

A problem caused by "air" insn't gonna come and go..what do you mean sometimes?


Ugch I gotta get ready for work. Talk amongst yourselves.

Also, go back and read post #5

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[bucket]

Oh my God. Relax

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He IS relaxed! Relax is probably his middle name, lol.

 

[MisterB]

He IS relaxed! Relax is probably his middle name, lol.

I dunno. I'm getting more of a nervous energy/ADHD vibe, but who knows lol.

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[Turbo4whl]

Lol. Maybe I made that sound a lot more dramatic than it is (or you're just taking it that way). Sometimes for the past 5 months or so, the brake pedal feels like I have to press a little harder to stop. If I let off and press it again, everything feels like it should

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Yes, could be a little air in the system. This condition could also be your rear brake shoes are not adjusting themselves as well as they should. The extra travel it takes for them to apply effects the front brakes as well.

You may know, GM's duel piston in a piston master cylinder, does not start to apply front disc brakes until the rear shoes contact the drum. A valve between the pistons is looking for a pressure above the pressure the rear shoe hold back springs create. If this pressure is not met, then the inner piston bottoms out and finally the front disc's are applied. Of course more pedal travel and less mechanical advantage from the brake pedal.

That will result in the second brake application working better than the first, same as if there is air in the system.

 

[MisterB]

Yes, could be a little air in the system. This condition could also be your rear brake shoes are not adjusting themselves as well as they should. The extra travel it takes for them to apply effects the front brakes as well.

You may know, GM's duel piston in a piston master cylinder, does not start to apply front disc brakes until the rear shoes contact the drum. A valve between the pistons is looking for a pressure above the pressure the rear shoe hold back springs create. If this pressure is not met, then the inner piston bottoms out and finally the front disc's are applied. Of course more pedal travel and less mechanical advantage from the brake pedal.

That will result in the second brake application working better than the first, same as if there is air in the system.

That's a very good explanation, and very well could explain what's going on.

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[Rusty Nail]

He IS relaxed! Relax is probably his middle name, lol.

It's actually "mother ******".. ask anybody.

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Race war is poppin off in Tulsa, Oklahoma tonight , there is definately nervous energy at play.


Look

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