crank vent tube at the top rear of a 60 283 block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cliffy · 01-18-2010, 09:10 PM

is there a common way to modify it to a pcv valve setup without involving the valve cover?

chopper john · 01-18-2010, 09:31 PM

pcv on the oil filler tube.but i think you still need a breather.

chopper john · 01-18-2010, 09:31 PM

so i answered nothin.

cliffy · 01-18-2010, 09:40 PM

snicker, no sweat.
I am thinkin I can adapt a line from the hole the tube is in. I haven't pulled it yet to see. Just thought I'd ask before hand.

Sicboy · 01-18-2010, 10:56 PM

Quote:

Originally Posted by chopper john

pcv on the oil filler tube.but i think you still need a breather.

Where can I get one of those oil filler tubes with the twist on cap?

*blackedoutharley* · 01-19-2010, 01:16 AM

At the rear of the block you are referring to what was commonly called a "road draft" tube. Came out of the block and then ran down the back next to the transmission.

Right?

**Captainfab** · 01-19-2010, 01:17 AM

Markeb01 did a little write up on how he did his. It did involve the valve cover, but is pretty much hidden. You will need to have a breather somewhere on the engine if you switch to a PCV valve.

Here is his writeup.....
http://www.67-72chevytrucks.com/vboa...d.php?t=366853

62gmc910 · 01-19-2010, 01:30 AM

Later 283-327s had a hose connected to the rear vent thru a pcv valve with a breather cap on the fill tube stant makes a slip on breather cap

markeb01 · 01-19-2010, 01:43 AM

If you have a 283 engine with the road draft tube in the block, you can run breatherless valve covers with not modifications at all. You need an adapter that bolts into the draft tube hole in the block in order to connect the pcv valve. The other end of the hose should connect to the base of the carburetor (full manifold vacuum). Here's a thread that discusses what to look for:

http://www.jalopyjournal.com/forum/s...d.php?t=151629

You'll also need an intake manifold with an oil fill tube and breather cap. You should not use one of the later designs with the pcv valve connected to the fill tube. These should only be used with vented valve covers. Even with a breather on top, if the pcv valve is just below the breather it will draw air in from the breather and the engine will not have adequate ventilation of crankcase fumes.

MacAttack · 01-19-2010, 04:08 PM

This is the way I did my '283', using the oil filler tube in the front of the intake manifold as the breather point - and the old draft tube as my PCV route - up to the aircleaner, via a "T" just after the valve - on the way out.

So far - So good, at least in particular application, with a two-barrel carb.

markeb01 · 01-19-2010, 05:50 PM

Here's a link to the piece needed to cleanly connect smog to the road draft hole. It took a while to find one anywhere.

http://cgi.ebay.com/ebaymotors/64-65...Q5fAccessories

cliffy · 01-19-2010, 09:13 PM

thanks for the replies fellas.
I like the pcv and grommet idea. I'm gonna try that first. I had a 600 edelbrock and aluminum intake given to me but I don't wanna lose the oem valve covers so I may just forgo the free intake.

Sicboy · 01-19-2010, 11:15 PM

Is the intake an Edelbrock Performer? It has a provision for an oil fill tube that can be milled out. That's what I did on my 327. As for the pcv setup, I have the elbow Mark mentioned on the back of the engine, then a short hose to an inline pcv valve, then a short hose vacuum port at the bottom the Edelbrock carb.

chopper john · 01-20-2010, 08:41 PM

cassic industries has them . ask for the late 60s impala 327 oil filler tube

cliffy · 02-13-2010, 10:36 PM

yeah it has the flat spot and I may just do that. The old manifold has no vacuum ports and Im goin power brakes.

01-18-2010, 09:10 PM	#1
cliffy Registered User Join Date: Oct 2006 Location: Canada Posts: 60	crank vent tube at the top rear of a 60 283 block is there a common way to modify it to a pcv valve setup without involving the valve cover? __________________ my o/l says the truck has a vibration at 65 mph..I said its ok, it goes away at 90.

01-18-2010, 09:31 PM	#2
chopper john Registered User Join Date: Oct 2009 Location: anaheim ca Posts: 274	Re: crank vent tube at the top rear of a 60 283 block pcv on the oil filler tube.but i think you still need a breather. Attached Images

01-18-2010, 09:31 PM	#3
chopper john Registered User Join Date: Oct 2009 Location: anaheim ca Posts: 274	Re: crank vent tube at the top rear of a 60 283 block so i answered nothin.

01-18-2010, 09:40 PM	#4
cliffy Registered User Join Date: Oct 2006 Location: Canada Posts: 60	Re: crank vent tube at the top rear of a 60 283 block snicker, no sweat. I am thinkin I can adapt a line from the hole the tube is in. I haven't pulled it yet to see. Just thought I'd ask before hand. __________________ my o/l says the truck has a vibration at 65 mph..I said its ok, it goes away at 90.

01-19-2010, 01:16 AM	#6
blackedoutharley Account Suspended Join Date: Jul 2007 Location: Plumas Lake, Ca. Posts: 1,009	Re: crank vent tube at the top rear of a 60 283 block At the rear of the block you are referring to what was commonly called a "road draft" tube. Came out of the block and then ran down the back next to the transmission. Right?

01-19-2010, 01:17 AM	#7
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: crank vent tube at the top rear of a 60 283 block Markeb01 did a little write up on how he did his. It did involve the valve cover, but is pretty much hidden. You will need to have a breather somewhere on the engine if you switch to a PCV valve. Here is his writeup..... http://www.67-72chevytrucks.com/vboa...d.php?t=366853 __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 01-19-2010 at 01:18 AM.

01-19-2010, 01:30 AM	#8
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: crank vent tube at the top rear of a 60 283 block Later 283-327s had a hose connected to the rear vent thru a pcv valve with a breather cap on the fill tube stant makes a slip on breather cap __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck)

01-19-2010, 01:43 AM	#9
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: crank vent tube at the top rear of a 60 283 block If you have a 283 engine with the road draft tube in the block, you can run breatherless valve covers with not modifications at all. You need an adapter that bolts into the draft tube hole in the block in order to connect the pcv valve. The other end of the hose should connect to the base of the carburetor (full manifold vacuum). Here's a thread that discusses what to look for: http://www.jalopyjournal.com/forum/s...d.php?t=151629 You'll also need an intake manifold with an oil fill tube and breather cap. You should not use one of the later designs with the pcv valve connected to the fill tube. These should only be used with vented valve covers. Even with a breather on top, if the pcv valve is just below the breather it will draw air in from the breather and the engine will not have adequate ventilation of crankcase fumes.

01-19-2010, 04:08 PM	#10
MacAttack 283 Drama Queen Join Date: Dec 2004 Location: Surf City, CA Posts: 2,435	Re: crank vent tube at the top rear of a 60 283 block This is the way I did my '283', using the oil filler tube in the front of the intake manifold as the breather point - and the old draft tube as my PCV route - up to the aircleaner, via a "T" just after the valve - on the way out. So far - So good, at least in particular application, with a two-barrel carb. Attached Images __________________ For about 12 years of my adult life I had a severe speech impediment. My ex-wife never let me get a word in edgewise.

01-19-2010, 05:50 PM	#11
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: crank vent tube at the top rear of a 60 283 block Here's a link to the piece needed to cleanly connect smog to the road draft hole. It took a while to find one anywhere. http://cgi.ebay.com/ebaymotors/64-65...Q5fAccessories

01-19-2010, 09:13 PM	#12
cliffy Registered User Join Date: Oct 2006 Location: Canada Posts: 60	Re: crank vent tube at the top rear of a 60 283 block thanks for the replies fellas. I like the pcv and grommet idea. I'm gonna try that first. I had a 600 edelbrock and aluminum intake given to me but I don't wanna lose the oem valve covers so I may just forgo the free intake. __________________ my o/l says the truck has a vibration at 65 mph..I said its ok, it goes away at 90.

01-19-2010, 11:15 PM	#13
Sicboy Registered User Join Date: Jun 2009 Location: Eugene, OR Posts: 200	Re: crank vent tube at the top rear of a 60 283 block Is the intake an Edelbrock Performer? It has a provision for an oil fill tube that can be milled out. That's what I did on my 327. As for the pcv setup, I have the elbow Mark mentioned on the back of the engine, then a short hose to an inline pcv valve, then a short hose vacuum port at the bottom the Edelbrock carb. __________________ Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson

01-20-2010, 08:41 PM	#14
chopper john Registered User Join Date: Oct 2009 Location: anaheim ca Posts: 274	Re: crank vent tube at the top rear of a 60 283 block cassic industries has them . ask for the late 60s impala 327 oil filler tube

02-13-2010, 10:36 PM	#15
cliffy Registered User Join Date: Oct 2006 Location: Canada Posts: 60	Re: crank vent tube at the top rear of a 60 283 block yeah it has the flat spot and I may just do that. The old manifold has no vacuum ports and Im goin power brakes. __________________ my o/l says the truck has a vibration at 65 mph..I said its ok, it goes away at 90.

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