What is this part? BB402 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Texasdeere · 11-04-2006, 10:11 PM

1972 C10 402

What does this little valve do? It seems to be plugged up

so I installed a push in breather there for now.

woodridge · 11-04-2006, 10:14 PM

PVC flame arresster (sp?) or bug catcher if the air filter gets left out

Texasdeere · 11-04-2006, 10:22 PM

The PCV valve is clear and working good, but there was so much vacuum inside the engine it whistled unless I pulled up the dipstick a little or removed the oil fill cap.

longhorn70gmc · 11-04-2006, 10:46 PM

Hi TexisC10,
It looks like your missing the same bracket I am. It mounts to the back of the A/C Compressor and mounts to the Engine intake Manifold on the passenger side of the motor. It goes across the top of the valve cover.
Respectfully

da-burb · 11-05-2006, 12:17 AM

Flame arrester is the correct answer. If your carb were to back fire, the screen inside this would stop the flame from ignighting any oil or fumes inside your engine. You should be able to soak it in solvent and blow it clean.

11-04-2006, 10:11 PM	#1
Texasdeere Registered User Join Date: Sep 2006 Location: League City, Texas Posts: 732	What is this part? BB402 1972 C10 402 What does this little valve do? It seems to be plugged up so I installed a push in breather there for now. Attached Images

11-04-2006, 10:14 PM	#2
woodridge Senior Member Join Date: Feb 2005 Location: Maynardville, Tn Posts: 3,030	Re: What is this part? BB402 PVC flame arresster (sp?) or bug catcher if the air filter gets left out __________________ SEMA Network- Protect our Hobby! 71 C30 in pieces, starting to come together. Click here for A Place For Tennessee Truck Enthusiest To Meet Last edited by woodridge; 11-04-2006 at 10:15 PM.

11-04-2006, 10:22 PM	#3
Texasdeere Registered User Join Date: Sep 2006 Location: League City, Texas Posts: 732	Re: What is this part? BB402 The PCV valve is clear and working good, but there was so much vacuum inside the engine it whistled unless I pulled up the dipstick a little or removed the oil fill cap.

11-04-2006, 10:46 PM	#4
longhorn70gmc Senior Member Join Date: Feb 2001 Location: Ridgecrest. CA, USA Posts: 1,715	Re: What is this part? BB402 Hi TexisC10, It looks like your missing the same bracket I am. It mounts to the back of the A/C Compressor and mounts to the Engine intake Manifold on the passenger side of the motor. It goes across the top of the valve cover. Respectfully __________________ Billy 1970 GMC Sierra Grande 402/TH400 (Longhorn)14 years and counting rebuild! 1975 (Build) Chevrolet SWB 4X4 350 SB Lifted 6 inches 1970 Ford F250 Ranger 390 BB 2010 Ford Super Duty F250 XLT W/4 inch lift kit and Pro Comp Tires Hub Cap Freak! *I need another truck like I need another hole in the head!* I'M IN THE MARKET...AS IT WERE! Last edited by longhorn70gmc; 11-04-2006 at 10:48 PM.

11-05-2006, 12:17 AM	#5
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	Re: What is this part? BB402 Flame arrester is the correct answer. If your carb were to back fire, the screen inside this would stop the flame from ignighting any oil or fumes inside your engine. You should be able to soak it in solvent and blow it clean. __________________ 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



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