Pvc Setups on a 68 with 327 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 12-06-2004, 02:54 AM

Can anyone tell me what kind of pvc setup was used on a 68 1/2 ton with a 327?

Thanks

skokie · 12-06-2004, 03:01 AM

Typo.

PCV is correct

Brainchild · 12-06-2004, 03:30 AM

There is none on the 67 327 1 ton we have,just the canister in the lifter valley.I'm not sure if that is the stock setup,but there is no holes in the valve covers where it should be.
All the blowby comes out of the oil filler tube,and straight into the cab <choke cough>Stinks too

texnician01 · 12-06-2004, 03:43 AM

Any motor that is pre 69 will have no provisions in the valve covers for a breather. They used the oil filler tube in the intake and a canister with road draft tube out the back. Some of them had an adapter in the place of the road draft tube that a vacuum line hooked up to like a pcv. All of the old blocks had a place in the back next to the dist for the road draft tube and the corresponding canister in the lifter valley. they also used an intake with oil filler hole. I ran into this problem with my 327 cause I used a newer block with old valve covers and intake. I have a vent through the filler tube but no way to pull air through the block. we drilled and tapped the intake for a chrysler pcv valve but it pulls too much oil vapor from the lifter valley and burns it. the thing looks like it has bad rings or valve guides cause it leaves a blue cloud. We are in the process of fabricating a canister type setup to slow down the air and get the oil droplets out before sending it back into the engine.

Hope that gives you some info.

Nathan

68CST327 · 12-06-2004, 03:48 AM

My 68 327, completely stock, has the PCV setup on it. One hose going from drivers side valve cover going to base of carb, passenger side valve cover has PCV valve in it... or something like that. I can't remember too well at this hour.

texnician01 · 12-06-2004, 04:11 AM

ok maybe it is 67. It's the ones that use solid valve covers if you have a pcv in the covers then you are set.

nathan

68CST327 · 12-06-2004, 04:14 AM

It's one of those years in there. All I know is that it signaled the beginning of the emissions controlled, power-choking era

toms68cst · 12-06-2004, 09:42 AM

My 68 327 has a stock PCV valve too. I don't remember how everything's piped up but I can snap some more pictures for you if you want skokie.

bagged74 · 12-06-2004, 11:09 AM

my 68 with a 307 has a pcv valve in the valve cover also.

skokie · 12-06-2004, 07:13 PM

Toms68cst pics would be good.

12-06-2004, 02:54 AM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Pvc Setups on a 68 with 327 Can anyone tell me what kind of pvc setup was used on a 68 1/2 ton with a 327? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

12-06-2004, 03:01 AM	#2
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Typo. PCV is correct __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

12-06-2004, 03:30 AM	#3
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	There is none on the 67 327 1 ton we have,just the canister in the lifter valley.I'm not sure if that is the stock setup,but there is no holes in the valve covers where it should be. All the blowby comes out of the oil filler tube,and straight into the cab <choke cough>Stinks too __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

12-06-2004, 03:43 AM	#4
texnician01 Senior Member Join Date: Mar 2002 Location: 12 Miles South of Des Moines, Iowa Posts: 359	Any motor that is pre 69 will have no provisions in the valve covers for a breather. They used the oil filler tube in the intake and a canister with road draft tube out the back. Some of them had an adapter in the place of the road draft tube that a vacuum line hooked up to like a pcv. All of the old blocks had a place in the back next to the dist for the road draft tube and the corresponding canister in the lifter valley. they also used an intake with oil filler hole. I ran into this problem with my 327 cause I used a newer block with old valve covers and intake. I have a vent through the filler tube but no way to pull air through the block. we drilled and tapped the intake for a chrysler pcv valve but it pulls too much oil vapor from the lifter valley and burns it. the thing looks like it has bad rings or valve guides cause it leaves a blue cloud. We are in the process of fabricating a canister type setup to slow down the air and get the oil droplets out before sending it back into the engine. Hope that gives you some info. Nathan __________________ 69 C-10, 340HP 327 55 chevy 4 door 150 47 Willys CJ-2A 05 Harley Night Train 06 1200 Sportster (Wife's bike) 70 Honda CL350 OIF2 & OIF7 Veteran Nathan & Tiffany

12-06-2004, 04:11 AM	#6
texnician01 Senior Member Join Date: Mar 2002 Location: 12 Miles South of Des Moines, Iowa Posts: 359	ok maybe it is 67. It's the ones that use solid valve covers if you have a pcv in the covers then you are set. nathan __________________ 69 C-10, 340HP 327 55 chevy 4 door 150 47 Willys CJ-2A 05 Harley Night Train 06 1200 Sportster (Wife's bike) 70 Honda CL350 OIF2 & OIF7 Veteran Nathan & Tiffany

12-06-2004, 03:48 AM	#5
68CST327 Registered User Join Date: Aug 2002 Location: USA Posts: 443	My 68 327, completely stock, has the PCV setup on it. One hose going from drivers side valve cover going to base of carb, passenger side valve cover has PCV valve in it... or something like that. I can't remember too well at this hour.

12-06-2004, 04:14 AM	#7
68CST327 Registered User Join Date: Aug 2002 Location: USA Posts: 443	It's one of those years in there. All I know is that it signaled the beginning of the emissions controlled, power-choking era

12-06-2004, 09:42 AM	#8
toms68cst Registered User Join Date: Jun 2000 Location: Bismarck, ND Posts: 4,293	My 68 327 has a stock PCV valve too. I don't remember how everything's piped up but I can snap some more pictures for you if you want skokie. __________________ Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles. TREASURER, Drum Brake Club.

12-06-2004, 11:09 AM	#9
bagged74 its just $$$$$ Join Date: Jul 2003 Location: OK Posts: 2,078	my 68 with a 307 has a pcv valve in the valve cover also.

12-06-2004, 07:13 PM	#10
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Toms68cst pics would be good. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

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