Old style script valve covers ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pritch · 03-15-2007, 10:09 PM

A buddy gave me these valve covers awhile back and I wanted to use them, but I notice there is no PVC or breather ports. Am I just out of luck, or is there another way. I don't want to add breathers.

Maybe I'll just hang them on the wall.

**NGN** · 03-15-2007, 10:32 PM

I got a set that seem to look close to yours , Mine came outta 67 Caprice Chevrolet , with a 327 motor. It was my moms car . Clean them up and put them on the garage wall.

72freak · 03-15-2007, 10:42 PM

Use a hole saw and drill your own hole and put a grommet in it.

**Ron 586** · 03-15-2007, 10:44 PM

Makes it a little hard to put oil in the engine. You need a old style intake with a oil fill tube and breather cap to use them.

Longhorn Man · 03-15-2007, 11:16 PM

72 freak... I did that once...NOT a good idea, at least, not without some thinking.
You'll have to drill through the lettering to place it properly. If you drill the hole at the end of the lettering, the rocker arms will smack the PCV valve and the breather/oil cap, and they will both fly off when ever you start the engine.
I have a very pretty one hanging up on my wall with a hole drilled in it just past the script.

1LoC10 · 03-16-2007, 12:25 AM

you could always try these breathers, that mount to the side
http://www.mooneyesusa.com/catalog/p...dbb2a0874a438f

3/4tonterror · 03-16-2007, 06:14 AM

use side mount breathers, or just use a old school intake with the oil fill in the intake and a pcv,/breather hookup in the intake. that how they were originally.i used side mount breathers, [edelbrock]

3/4tonterror · 03-16-2007, 06:21 AM

here is what i did, on both v-covers with no problems on my 70 4x4.
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68Stepbed · 03-16-2007, 08:01 AM

3/4tonterror I bet that thing is tough to drive without steering linkage, exhaust, and a radiator

j/k

I like the way those side mounted breathers look on those v/c's. If only they were painted orange to match.

3/4tonterror · 03-16-2007, 08:08 AM

68stepbed, yea i thought i might paint them too. it would help with the old school image.thanks for the coment thow.

BurnoutNova · 03-16-2007, 08:25 AM

it still wont work to JUST put breathers in the valvecovers. i had these same valvecovers on my 71 K10 and a 67 intake manifold with the oil fill tube in the front, and there was a breather in the fill tube also.

after a bit of driving LOTS of smoke and oil seeps out of the breather, because theres no other way for pressure to be evacuated from the engine. the engines that did not have pcv valves had what was called a "road draft" system, where there was a big cannister filter insde the lifter valley, and a tube running down the backside of the engine to the bottom of the car, and as you drove down the road it created a vacuum, much like a pcv vcle. even if you put a pcv valve in the script style valve covers theres no baffle to keep it from sucking up oil. this was on a brand new stock 350. i put my original 350 valve covers back on, with the pcv valve and it works great now.

**special-K** · 03-16-2007, 08:38 AM

You just need the complete pre-pvc system.There are speed equipment manifolds as well as factory.You`re in the vintage realm,now.

BurnoutNova · 03-16-2007, 08:45 AM

Quote:

Originally Posted by special-K

You just need the complete pre-pvc system.There are speed equipment manifolds as well as factory.You`re in the vintage realm,now.

how will you complete the pre pcv system without the correct block? theres no hol for the road drft tube in most blocks

3/4tonterror · 03-16-2007, 08:50 AM

burnoutnova, i know what you are saying i have a 65 chevelle with its original setup, but this motor has more than 10,000 miles on it with no problems. [smoke or oil sepage]this has baffles in the breathers.i also run this setup in a 87 MUSTANG GT with a BB chevy 454, drag car, 3 breathers and no pcv, with no problems

**special-K** · 03-16-2007, 09:45 AM

Quote:

Originally Posted by BurnoutNova

how will you complete the pre pcv system without the correct block? theres no hol for the road drft tube in most blocks

You`re in the vintage realm,now.

jkaylor68gmc · 03-16-2007, 09:51 AM

No problem at all, just pick up a pre-69 small block intake, you may find one like I did from the mid '70s, Holley they all drilled a hole in the front of the intake and you put a breather there for crankcase ventalation. You also pour your oil in through there. No big deal.

72freak · 03-16-2007, 04:00 PM

Quote:

Originally Posted by Longhorn Man

72 freak... I did that once...NOT a good idea, at least, not without some thinking.
You'll have to drill through the lettering to place it properly. If you drill the hole at the end of the lettering, the rocker arms will smack the PCV valve and the breather/oil cap, and they will both fly off when ever you start the engine.
I have a very pretty one hanging up on my wall with a hole drilled in it just past the script.

yep........... I carefully planned it out before I did it and it was sucessfull. I have also used the side mounted breathers. Both worked fine!!

**jaros44sr** · 03-16-2007, 05:03 PM

I have the same problem, alum. finned corvette valve covers. no hole for pvc.

So why does it work in one engine and not the other? I was going to put the breathers in them but if it doesn't work I would rather not have holes in them. What to do....any ideas??????

pritch · 03-16-2007, 10:39 PM

I'm leaning toward just making some wall art out of them. I like the side breather look, but I don't want to cut up old parts like these. I also have a script VC for a I-6 that has the breathers, and I'm about 58%

sure I'll go with a 6 when I rebuild my Panel anyway.

customcamper72 · 03-16-2007, 10:45 PM

none of my old vehicles run a pcv valve, just breathers, no problems, and they both are used as daily drivers in the spring/summer months.

BurnoutNova · 03-16-2007, 11:38 PM

not gonna argue, but theres a reason the manufacturers started using pcv systems... once an engine starts to wear, and there is some blowby... it creates pressure and the pcv scavenges it so much better by putting a vacuum on it and burning it... why just let it breath out? it also can make the engine last longer, and the valve cover/oil pan/ intake and timing cover gaskets wont leak as soon.

on my stock 1971 350, with the 67 corvette intake and script valve covers (only breather was in the oil filler tube) it smoked out of the breather and oil accumulated on the intake. so i put the stock valve covers back on, with a pcv valve and left the 67 intake on, just because its easier to fill it with oil.

on my nova im plannin on putting an evac kit on it... check valves in the the collectors of the headers and 5/8" heater hose one from each valvecover. since it doesnt make much vacuum at all with the cam it has

my .02

3/4tonterror · 03-17-2007, 07:25 AM

Burnout nova, not a good idea to run a evac system if its a street car.

BurnoutNova · 03-17-2007, 09:27 AM

not really a street car... but it is licenced.

03-15-2007, 10:09 PM	#1
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Old style script valve covers ? A buddy gave me these valve covers awhile back and I wanted to use them, but I notice there is no PVC or breather ports. Am I just out of luck, or is there another way. I don't want to add breathers. Maybe I'll just hang them on the wall. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

03-15-2007, 10:32 PM	#2
NGN Registered User Join Date: Nov 2001 Location: Old Bridge,NJ Posts: 829	Re: Old style script valve covers ? I got a set that seem to look close to yours , Mine came outta 67 Caprice Chevrolet , with a 327 motor. It was my moms car . Clean them up and put them on the garage wall.

03-15-2007, 10:42 PM	#3
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: Old style script valve covers ? Use a hole saw and drill your own hole and put a grommet in it.

03-15-2007, 10:44 PM	#4
Ron 586 RIP Mr Ron Join Date: Dec 2005 Location: Big Sandy, Tn. 38221 Posts: 8,166	Re: Old style script valve covers ? Makes it a little hard to put oil in the engine. You need a old style intake with a oil fill tube and breather cap to use them. __________________ Ron (Mr Round Tuit) Be kinder than necessary, for everyone you meet is fighting some kind of battle TN Message Forum TN Facebook Group SETN Truck Show My Photobucket

03-15-2007, 11:16 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Old style script valve covers ? 72 freak... I did that once...NOT a good idea, at least, not without some thinking. You'll have to drill through the lettering to place it properly. If you drill the hole at the end of the lettering, the rocker arms will smack the PCV valve and the breather/oil cap, and they will both fly off when ever you start the engine. I have a very pretty one hanging up on my wall with a hole drilled in it just past the script.

03-16-2007, 12:25 AM	#6
1LoC10 Insert Title Here Join Date: Feb 2006 Location: Dyer, Indiana Posts: 5,679	Re: Old style script valve covers ? you could always try these breathers, that mount to the side http://www.mooneyesusa.com/catalog/p...dbb2a0874a438f __________________ BOBBY _69 SWB_ 1000 pics of 67-72's>> http://s193.photobucket.com/albums/z...-72/?start=all << Last edited by 1LoC10; 03-16-2007 at 12:26 AM.

03-16-2007, 06:14 AM	#7
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Old style script valve covers ? use side mount breathers, or just use a old school intake with the oil fill in the intake and a pcv,/breather hookup in the intake. that how they were originally.i used side mount breathers, [edelbrock]

03-16-2007, 06:21 AM	#8
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Old style script valve covers ? here is what i did, on both v-covers with no problems on my 70 4x4.

03-16-2007, 08:01 AM	#9
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: Old style script valve covers ? 3/4tonterror I bet that thing is tough to drive without steering linkage, exhaust, and a radiator j/k I like the way those side mounted breathers look on those v/c's. If only they were painted orange to match. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

03-16-2007, 08:08 AM	#10
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Old style script valve covers ? 68stepbed, yea i thought i might paint them too. it would help with the old school image.thanks for the coment thow.

03-16-2007, 08:25 AM	#11
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: Old style script valve covers ? it still wont work to JUST put breathers in the valvecovers. i had these same valvecovers on my 71 K10 and a 67 intake manifold with the oil fill tube in the front, and there was a breather in the fill tube also. after a bit of driving LOTS of smoke and oil seeps out of the breather, because theres no other way for pressure to be evacuated from the engine. the engines that did not have pcv valves had what was called a "road draft" system, where there was a big cannister filter insde the lifter valley, and a tube running down the backside of the engine to the bottom of the car, and as you drove down the road it created a vacuum, much like a pcv vcle. even if you put a pcv valve in the script style valve covers theres no baffle to keep it from sucking up oil. this was on a brand new stock 350. i put my original 350 valve covers back on, with the pcv valve and it works great now.

03-16-2007, 08:38 AM	#12
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: Old style script valve covers ? You just need the complete pre-pvc system.There are speed equipment manifolds as well as factory.You`re in the vintage realm,now. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

03-16-2007, 08:50 AM	#14
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Old style script valve covers ? burnoutnova, i know what you are saying i have a 65 chevelle with its original setup, but this motor has more than 10,000 miles on it with no problems. [smoke or oil sepage]this has baffles in the breathers.i also run this setup in a 87 MUSTANG GT with a BB chevy 454, drag car, 3 breathers and no pcv, with no problems

03-16-2007, 09:51 AM	#16
jkaylor68gmc Senior Member Join Date: Dec 2005 Location: TN Posts: 2,448	Re: Old style script valve covers ? No problem at all, just pick up a pre-69 small block intake, you may find one like I did from the mid '70s, Holley they all drilled a hole in the front of the intake and you put a breather there for crankcase ventalation. You also pour your oil in through there. No big deal.

03-16-2007, 05:03 PM	#18
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,515	Re: Old style script valve covers ? I have the same problem, alum. finned corvette valve covers. no hole for pvc. So why does it work in one engine and not the other? I was going to put the breathers in them but if it doesn't work I would rather not have holes in them. What to do....any ideas?????? __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim



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03-16-2007, 10:39 PM	#19
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Re: Old style script valve covers ? I'm leaning toward just making some wall art out of them. I like the side breather look, but I don't want to cut up old parts like these. I also have a script VC for a I-6 that has the breathers, and I'm about 58% sure I'll go with a 6 when I rebuild my Panel anyway. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

03-16-2007, 10:45 PM	#20
customcamper72 Registered User Join Date: Jan 2007 Location: wisconsin Posts: 51	Re: Old style script valve covers ? none of my old vehicles run a pcv valve, just breathers, no problems, and they both are used as daily drivers in the spring/summer months.

03-16-2007, 11:38 PM	#21
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: Old style script valve covers ? not gonna argue, but theres a reason the manufacturers started using pcv systems... once an engine starts to wear, and there is some blowby... it creates pressure and the pcv scavenges it so much better by putting a vacuum on it and burning it... why just let it breath out? it also can make the engine last longer, and the valve cover/oil pan/ intake and timing cover gaskets wont leak as soon. on my stock 1971 350, with the 67 corvette intake and script valve covers (only breather was in the oil filler tube) it smoked out of the breather and oil accumulated on the intake. so i put the stock valve covers back on, with a pcv valve and left the 67 intake on, just because its easier to fill it with oil. on my nova im plannin on putting an evac kit on it... check valves in the the collectors of the headers and 5/8" heater hose one from each valvecover. since it doesnt make much vacuum at all with the cam it has my .02

03-17-2007, 07:25 AM	#22
3/4tonterror Registered User Join Date: Dec 2006 Location: jaffrey,NH Posts: 325	Re: Old style script valve covers ? Burnout nova, not a good idea to run a evac system if its a street car.

03-17-2007, 09:27 AM	#23
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: Old style script valve covers ? not really a street car... but it is licenced.

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