Unidentified object - The 1947 - Present Chevrolet & GMC Truck Message Board Network

eightbanger · 09-02-2008, 11:38 AM

I went to replace this Thingamajig shown in my hand (SEE PIC)and the guy at the parts store said that I should have one of those already fitted to the booster.."I forgot what the heck he called it" and not to bother replaceing the one shown in my hand and that I should remove it.
My questions are...
What is it?
What does it do?
Do I really have two of the same thing doing the same job?
Can I start over, and remove both and fit the correct replacement?

Luvlegs · 09-02-2008, 11:54 AM

you already have the check valve on the booster (the other end of the hose is hooked to it) - I don't know if what you are holding is just an inline check valve or not but if it is, you don't need two... maybe the one on the booster was bad?

eightbanger · 09-02-2008, 11:57 AM

Thanks mate, that's what he called it! can I replace the one in the booster or not ? is that why the PO added another inline?

ChevLoRay · 09-02-2008, 12:03 PM

It looks to me like the one that is in-line is in the reverse position of the one in the booster. Can you separate them from the hoses, then plug the in-line one into the booster?? If so, and it is a good check valve, the hoses look like they would connect from the base of the intake to the booster and save you an elbow in the hose. Grammar is an issue.....

eightbanger · 09-02-2008, 12:25 PM

Quote:

Originally Posted by LOW DOUGH

Well, it should be a one way check valve used to keep trash from getting in the booster. I don't think the thing attached to the booster is one. Just the one in your hand.I forgot what it was called.

Thanks LowDough
OK! if thats the case what would a check valve in the booster look like?
Anyone got any pics?

Quote:

Originally Posted by ChevLoRay

It looks to me like the one that is in-line is in the reverse position of the one in the booster. Can you separate them from the hoses, then plug the in-line one into the booster?? If so, and it is a good check valve, the hoses look like they would connect from the base of the intake to the booster and save you an elbow in the hose. Grammar is an issue.....

Thanks Chevloray
Not sure if I can pull that piece out of the Booster, i'll give it a go.
Neither hose is long enough to go from Booster to Carb, would need a new peice.

LOW DOUGH · 09-02-2008, 12:02 PM

Well, it should be a one way check valve used to keep trash from getting in the booster. I don't think the thing attached to the booster is one. Just the one in your hand.

I forgot what it was called.

463 · 09-02-2008, 01:08 PM

forgot what it was called.[/QUOTE] me too

they were installed on gm on or about 1978 up in Canada to prevent trash from entering the brake booster. the hose from that filter connects to manifold vac port at the back of a gm carb or a intake port just back of the carb. the truck will work as normal with or without the filter in the brake booster vac line.

LOW DOUGH · 09-02-2008, 12:35 PM

you can pull that out of the booster. I have.. No problems. You might want someone else to chim in about pulling that out. I don't see a problem with that.

eightbanger · 09-02-2008, 01:28 PM

Well I suppose that about solves it, now I know what it is and what it does, I may still get a replacement and get rid of the inline one to tidy it up.
Thanks 463

Halleyluya to the 67-72 Chevy Trucks Forum.

**kwmech** · 09-02-2008, 03:50 PM

GM installed that "filter" inline to prevent gasoline vapors from deteriorating the rubber diaphram in the booster. I put them in all my trucks

some booster rebuilders send them with the unit in the box

eightbanger · 09-02-2008, 05:27 PM

kwmech What should I ask for when ordering a replcement?
Is it still just called a check valve?

BLACK AND BLUE 67-72 · 09-02-2008, 05:38 PM

It's a filter as said above ^^^^ NAPA PART #675-5136 Balkamp part, They do help with the rubber deterioration in the booster though.

09-02-2008, 11:38 AM	#1
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Unidentified object I went to replace this Thingamajig shown in my hand (SEE PIC)and the guy at the parts store said that I should have one of those already fitted to the booster.."I forgot what the heck he called it" and not to bother replaceing the one shown in my hand and that I should remove it. My questions are... What is it? What does it do? Do I really have two of the same thing doing the same job? Can I start over, and remove both and fit the correct replacement? __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

09-02-2008, 11:54 AM	#2
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: Unidentified object you already have the check valve on the booster (the other end of the hose is hooked to it) - I don't know if what you are holding is just an inline check valve or not but if it is, you don't need two... maybe the one on the booster was bad? __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

09-02-2008, 11:57 AM	#3
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: Unidentified object Thanks mate, that's what he called it! can I replace the one in the booster or not ? is that why the PO added another inline? __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

09-02-2008, 12:03 PM	#4
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Unidentified object It looks to me like the one that is in-line is in the reverse position of the one in the booster. Can you separate them from the hoses, then plug the in-line one into the booster?? If so, and it is a good check valve, the hoses look like they would connect from the base of the intake to the booster and save you an elbow in the hose. Grammar is an issue..... __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

09-02-2008, 01:08 PM	#7
463 Registered User Join Date: Nov 2007 Location: Sask Canada Posts: 1,666	Re: Unidentified object forgot what it was called.[/QUOTE] me too they were installed on gm on or about 1978 up in Canada to prevent trash from entering the brake booster. the hose from that filter connects to manifold vac port at the back of a gm carb or a intake port just back of the carb. the truck will work as normal with or without the filter in the brake booster vac line. __________________ Trueman

09-02-2008, 12:02 PM	#6
LOW DOUGH I'M TRUCK CRAZY! Join Date: Oct 2006 Location: Sachse, TEXAS Posts: 1,737	Re: Unidentified object Well, it should be a one way check valve used to keep trash from getting in the booster. I don't think the thing attached to the booster is one. Just the one in your hand. I forgot what it was called.

09-02-2008, 12:35 PM	#8
LOW DOUGH I'M TRUCK CRAZY! Join Date: Oct 2006 Location: Sachse, TEXAS Posts: 1,737	Re: Unidentified object you can pull that out of the booster. I have.. No problems. You might want someone else to chim in about pulling that out. I don't see a problem with that.

09-02-2008, 01:28 PM	#9
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: Unidentified object Well I suppose that about solves it, now I know what it is and what it does, I may still get a replacement and get rid of the inline one to tidy it up. Thanks 463 Halleyluya to the 67-72 Chevy Trucks Forum. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

09-02-2008, 03:50 PM	#10
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,630	Re: Unidentified object GM installed that "filter" inline to prevent gasoline vapors from deteriorating the rubber diaphram in the booster. I put them in all my trucks some booster rebuilders send them with the unit in the box Last edited by kwmech; 09-02-2008 at 03:52 PM.

09-02-2008, 05:27 PM	#11
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: Unidentified object kwmech What should I ask for when ordering a replcement? Is it still just called a check valve? __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger

09-02-2008, 05:38 PM	#12
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: Unidentified object It's a filter as said above ^^^^ NAPA PART #675-5136 Balkamp part, They do help with the rubber deterioration in the booster though. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA Last edited by BLACK AND BLUE 67-72; 09-02-2008 at 05:41 PM.

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