Valve cover - inline 6 - 292CI - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Asshat · 04-07-2021, 07:45 PM

I picked up this valve cover on eBay from Speedway Motors. Only thing is, it has a side port at the front. Does anyone know what that is for and how I could plug it?

Also, the hole in front for the oil-fill is not notched for the cap. And, the hole at the back is bigger than the PCV valve.

Asshat · 04-07-2021, 10:40 PM

Well, I found a plug for the side port and a grommet for the PCV valve; just need to find a filler cap. Or modify the cover and try to make the old cap work.

Has anyone found a different oil filler cap? Would be nice if it was chrome.

geezer#99 · 04-07-2021, 11:00 PM

Look for a push in type cap.
That side port is for fresh air into the motor for pcv to work. A hose runs from the air cleaner to it.
I’ve seen push in breather caps used instead of your plumbers plug.

Look here on speedway.

https://www.speedwaymotors.com/Searc...in%20breathers

D13 · 04-08-2021, 06:41 AM

Yep, cover is for a later (70's) motor with PCV. They used the plug so the air was drawn from the air cleaner via the side port, then into the intake via the rear top PVC valve.
Takes a standard 70's OIL rubber plug. You can plug the side port it you aren't running a PVC, but you should run one, or a breather that plugs into the PCV port.

Asshat · 04-08-2021, 11:42 PM

I’m not happy with the chrome cover, going to run it for a while, but I think it’s going to leak. Cheaply made.
Oh well, at least I got my valves adjusted.

geezer#99 · 04-09-2021, 12:36 AM

Yup!
Shiny but generally cheaply built.
Much better with an aluminum cover if you can find one.

**'68OrangeSunshine** · 04-09-2021, 10:29 PM

I use the PCV system -- even though I have an aftermarket intake and carb -- by running a hose from a grommet in that front/side hole thru an elbow to a anti/backfire mesh and into a hole in my aftermarket 12'' air cleaner. PCV valve is plugged into the rear/top port on the valve cover and returns to a 3/8'' port on the front of my Edelbrock 1404 carb.
Theory is: clean fresh air is sucked into the valvecover forward baffle thru the air cleaner. Hot oily vapors are sucked out of the rear valve cover thru the PCV valve and into the carb, where they are reintroduced to the Air/Fuel mixture and burned.
Seems to work OK.

04-07-2021, 07:45 PM	#1
Asshat Registered User Join Date: Jul 2015 Location: South Orange County CA Posts: 1,259	Valve cover - inline 6 - 292CI I picked up this valve cover on eBay from Speedway Motors. Only thing is, it has a side port at the front. Does anyone know what that is for and how I could plug it? Also, the hole in front for the oil-fill is not notched for the cap. And, the hole at the back is bigger than the PCV valve. Attached Images __________________ 1963 C20, small window, long bed 292, 4-speed

04-07-2021, 10:40 PM	#2
Asshat Registered User Join Date: Jul 2015 Location: South Orange County CA Posts: 1,259	Re: Valve cover - inline 6 - 292CI Well, I found a plug for the side port and a grommet for the PCV valve; just need to find a filler cap. Or modify the cover and try to make the old cap work. Has anyone found a different oil filler cap? Would be nice if it was chrome. Attached Images __________________ 1963 C20, small window, long bed 292, 4-speed

04-07-2021, 11:00 PM	#3
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,510	Re: Valve cover - inline 6 - 292CI Look for a push in type cap. That side port is for fresh air into the motor for pcv to work. A hose runs from the air cleaner to it. I’ve seen push in breather caps used instead of your plumbers plug. Look here on speedway. https://www.speedwaymotors.com/Searc...in%20breathers Last edited by geezer#99; 04-08-2021 at 12:18 AM.

04-08-2021, 06:41 AM	#4
D13 Registered User Join Date: Feb 2007 Location: Memphis MI Posts: 1,851	Re: Valve cover - inline 6 - 292CI Yep, cover is for a later (70's) motor with PCV. They used the plug so the air was drawn from the air cleaner via the side port, then into the intake via the rear top PVC valve. Takes a standard 70's OIL rubber plug. You can plug the side port it you aren't running a PVC, but you should run one, or a breather that plugs into the PCV port. __________________ 1987 2 ton 1982 250/TH350 beater in progress Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping Plus a mess o' tractors

04-08-2021, 11:42 PM	#5
Asshat Registered User Join Date: Jul 2015 Location: South Orange County CA Posts: 1,259	Re: Valve cover - inline 6 - 292CI I’m not happy with the chrome cover, going to run it for a while, but I think it’s going to leak. Cheaply made. Oh well, at least I got my valves adjusted. __________________ 1963 C20, small window, long bed 292, 4-speed

04-09-2021, 12:36 AM	#6
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,510	Re: Valve cover - inline 6 - 292CI Yup! Shiny but generally cheaply built. Much better with an aluminum cover if you can find one.

04-09-2021, 10:29 PM	#7
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,022	Re: Valve cover - inline 6 - 292CI I use the PCV system -- even though I have an aftermarket intake and carb -- by running a hose from a grommet in that front/side hole thru an elbow to a anti/backfire mesh and into a hole in my aftermarket 12'' air cleaner. PCV valve is plugged into the rear/top port on the valve cover and returns to a 3/8'' port on the front of my Edelbrock 1404 carb. Theory is: clean fresh air is sucked into the valvecover forward baffle thru the air cleaner. Hot oily vapors are sucked out of the rear valve cover thru the PCV valve and into the carb, where they are reintroduced to the Air/Fuel mixture and burned. Seems to work OK. Attached Images __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 04-09-2021 at 10:34 PM. Reason: add pix



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