What is this - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**FRENCHBLUE72** · 05-26-2003, 02:33 AM

Anyone have any clue as to what this is . It was located in the vaccume line between the brake booster and intake port.

*Phillip Johnson* · 05-26-2003, 02:47 AM

I would guess a one way check valve.. only a guess.. If you can blow air through one end and not the other, that is what it is. Ive never seen one on any of my trucks but, Ive never really looked....

**FRENCHBLUE72** · 05-26-2003, 02:51 AM

You can blow air threw it both way's????????

**GMCPaul** · 05-26-2003, 04:06 AM

Looks and sounds like a bad one way check valve.
GMCPaul

73stepside · 05-26-2003, 04:47 AM

it is a vacuum check valve. you can find those at any auto parts store in the help packages. it keeps vacumm in the booster for one application of the brakes after the engine dies.

da-burb · 05-26-2003, 10:04 AM

The check valve in our trucks is the 90 degree plastic fitting at the end of the hose going into the booster.

Class of 69 · 05-26-2003, 10:11 AM

Looks like trash can filler now!! It's useless if air goes both ways. Do you have the factory one in the booster grommet too? That one may be bad also, better check it.

**FRENCHBLUE72** · 05-26-2003, 10:41 AM

I still have the little whie fitting in the booster. Guess I will have to get a new check valve..THANK'S LUKE

05-26-2003, 02:33 AM	#1
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	What is this Anyone have any clue as to what this is . It was located in the vaccume line between the brake booster and intake port. Attached Images __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

05-26-2003, 02:51 AM	#3
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	You can blow air threw it both way's???????? __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

05-26-2003, 04:06 AM	#4
GMCPaul Senior Member Join Date: Mar 2000 Location: Rockville,In. USA Posts: 3,719	Looks and sounds like a bad one way check valve. GMCPaul __________________ Secure Online Catalog for-GMCPauls Truck Parts Email- GMCPAULS@GMAIL.COM

05-26-2003, 04:47 AM	#5
73stepside Registered User Join Date: Feb 2002 Location: Moore OK 73160 Posts: 974	it is a vacuum check valve. you can find those at any auto parts store in the help packages. it keeps vacumm in the booster for one application of the brakes after the engine dies. __________________ 04 GMC Sierra RCSS 70 CST LWB 04 HD Sportster 1200 Custom

05-26-2003, 10:04 AM	#6
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	The check valve in our trucks is the 90 degree plastic fitting at the end of the hose going into the booster. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

05-26-2003, 02:47 AM	#2
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,580	I would guess a one way check valve.. only a guess.. If you can blow air through one end and not the other, that is what it is. Ive never seen one on any of my trucks but, Ive never really looked....

05-26-2003, 10:11 AM	#7
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Looks like trash can filler now!! It's useless if air goes both ways. Do you have the factory one in the booster grommet too? That one may be bad also, better check it. __________________ 69 GMC K10 ..some restoration required....still..

05-26-2003, 10:41 AM	#8
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	I still have the little whie fitting in the booster. Guess I will have to get a new check valve..THANK'S LUKE __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..



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