Need Name or Part Number
 

I'm trying to keep my truck as original as possible including the emissions stuff. My truck is a 72 with 35/350 and factory A/C. On the passenger side there is a hose that goes form the Air Cleaner to the valve cover and I want to replace the "thing" that goes in to the valve cover. I know it has arcs in it but can't sem to find a listing for it and do not know the proper name of it. I would like to replace it, does anyone know where to buy one or have name and/or part number for it?

Re: Need Name or Part Number
 

If my memory serves me correctly it's called a spark arrester.

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PCV valve?

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It is called a flame arrestor.

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whats in the valve cover on the other side generally there is a grommet and then the PCV valve in the cover while yours appears to simple be jammed into the valve cover...

I have never seen or heard of a flame arrestor on a vehicle except for a race vehicles air cleaner being made of flame resistant materials but could be wrong here

Here is an image of a simple PCV Valve OEM numbers could be as follows
25040145, 25040148, 25043355

http://static.summitracing.com/globa...m-fv181_ml.jpg

Re: Need Name or Part Number
 

On my truck the PCV Valve is on the drivers side and i did replace it already.

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Is this it? https://scontent-ord1-1.xx.fbcdn.net...8a&oe=57A26BAF This came off of a 350ci 72' C-10 $30 shipped...

Re: Need Name or Part Number
 

As stated above, it's a flame arrestor. It is not considered to be a normal service replacement item. Why do you feel you need to replace it? My 1969 service manual recommends this:
"Remove the flame arrestor and wash in solvent, then dry with compressed air."

I believe as long as it permits the free flow of air, all is well.

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This is it..At the bottom of the hose.

Re: Need Name or Part Number
 

Thanks, and that is why I probably cant find one. I didn't realize they lasted the life of the vehicle. I just thought it'd plug up over 40 years and thought its time to replace. I guess i should get a Service Manual for the truck.

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Okay did some more looking through catalogs and for 72 400 BBC and 350 SBC I found a flame arrestor part number 6262992 it's not shown in a diagram though or else I would have scanned one in for us

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I'm still running my original (119,000+ miles) as long as I can blow through it without restriction, I'm happy. I've never cleaned it that I can recall.

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So, does the flame arrestor have a one way valve inside to prevent possible backfire flame from entering inside the valve cover?

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No. It's free flowing both directions. It appears to have metal "louvers" (probably a series of them) which apparently block a backfire from entering the valve cover. It's visible from the valve cover end. I've never looked at one from the carb end. Some other Chevys (Corvettes, etc.) used a screen-like dome filled with a metal mesh which I believe was inside the air cleaner.

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Good info!

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Here's a 1972 service manual link from Hatzie's thread. Look at pages Engine 6-6 and Engine 6-7.
ST_330_72_1972_Chevrolet_Truck_10-30_Chassis_Service_Manual

Oops... that didn't work. Here's the link to the thread.

http://67-72chevytrucks.com/vboard/s....php?p=5781194

Re: Need Name or Part Number
 

This is what it looks like at the valve cover end.

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Here's some basic patent info. Not much use though.

http://ip.com/pat/US3287094

EDIT: Tis time to beat the dead horse...

http://www.freepatentsonline.com/3287094.pdf

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OK, for those wanting a new one. Gm Part #3857476 (discontinued).
http://www.ebay.com/itm/Corvette-NOS...3D170965175853

http://www.ebay.com/itm/GM-NOS-1964-...-/170965175853

http://www.ebay.com/itm/NOS-Genuine-...dWnPjo&vxp=mtr

http://www.ebay.com/itm/1964-1965-Co...VW7u0x&vxp=mtr

http://www.ebay.com/itm/1964-1967-Co...tW6XI9&vxp=mtr

http://www.ebay.com/itm/NOS-Corvette...tWhL2C&vxp=mtr

Re: Need Name or Part Number
 

I appreciate all your help but t 49 and 55.00 US diallers plus shipping and what the Government takes, I pulled mine today and could blow through it so I'll keep it for now.

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But, I added some that are less expensive!

Jim

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Ok...so my memory isn't so good.....flame arrester not a spark arrester......lol

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Your memory isn't so bad. Spark arrester is pretty damn close! I think it sends the same message. :devil:

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So my spark arrester was hardly letting any air through - it was serious caked with old oil. I have it about 90~95% opened up now I wasn't able to get it off the hose and I ended up cracking it (at the 90 degree bend).

Anyone got a lead on the hoses?

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Grumpy old man gave a link to a marine engine supply here in this post:
https://67-72chevytrucks.com/vboard/...05#post8858005
There is also discussion on that thread and some other threads about using heater hoses but I'm not sure I would take that approach because it would not be fuel and oil resistant material (EPDM rubber that Gates part #28475 is made of is not fuel and oil resistant).