Road Draft Tube Conversion - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Captainfab** · 11-01-2014, 01:20 AM

Bump for HumphreyMurdoc

LostMy65 · 12-14-2015, 05:42 PM

Nice thread.

Figuarus · 03-28-2016, 01:47 PM

Update : Possible issue

So I goaded my dad into driving my truck to Los Angeles instead of taking his Honda, and while down there, I noticed something.

On the back of the manifold, there is a vacuum port between the carb and the distributor. I previously had the pcv line from the road draft tube connected there.

I had noticed that the driver side valve cover breather is allowing oil droplets to land on the valve cover and film it over. I thought this to be unusual since the PCV valve and line should pull air IN through the breather, not allow it to film over with oil.

I pulled it the other day to inspect it thinking that the line was blocked or something, and noticed oil in the line. Nothing creamy, but there was lots of oil residue.

I decided to move the line to the front vacuum port on the front of the quadrajet, and after driving about 700 miles, i took the hose off, and saw more oil in the line.

Could this be because of a missing baffle in the valley, or is there something else going on here?

I remember seeing a thread a long while back where someone filled a small soup can with steel wool, and had that act as a catch can for extra oil. I'm assuming that it was done due to blow-by issues, but I cannot for the life of me find the thread.

65chevysub · 03-28-2016, 02:33 PM

Sorry to break in on this thread. I have the ventilator that came with my 283 but it's not in the engine. My pcv is hooked up to the adapter and going to my carb. My question is, should the ventilator be mounted in the engine for everything to work properly, or will it work without the ventilator?_ I have the same problem of oil all over the back and botton of the engine) Is there a gasket for the block adapter?

**Captainfab** · 03-28-2016, 11:36 PM

The canister that sits in the lifter valley and connected to the road draft port is there to help keep oil from being ejected/sucked thru that port. If your engine has a bit of blowby, there is only so much you can do to keep the outside of the engine clean of oil.

11-01-2014, 01:20 AM	#26
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Road Draft Tube Conversion Bump for HumphreyMurdoc __________________ 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

12-14-2015, 05:42 PM	#27
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,530	Re: Road Draft Tube Conversion Nice thread. __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

03-28-2016, 01:47 PM	#28
Figuarus Registered User Join Date: Sep 2014 Location: Salt Lake City, UT Posts: 346	Re: Road Draft Tube Conversion Update : Possible issue So I goaded my dad into driving my truck to Los Angeles instead of taking his Honda, and while down there, I noticed something. On the back of the manifold, there is a vacuum port between the carb and the distributor. I previously had the pcv line from the road draft tube connected there. I had noticed that the driver side valve cover breather is allowing oil droplets to land on the valve cover and film it over. I thought this to be unusual since the PCV valve and line should pull air IN through the breather, not allow it to film over with oil. I pulled it the other day to inspect it thinking that the line was blocked or something, and noticed oil in the line. Nothing creamy, but there was lots of oil residue. I decided to move the line to the front vacuum port on the front of the quadrajet, and after driving about 700 miles, i took the hose off, and saw more oil in the line. Could this be because of a missing baffle in the valley, or is there something else going on here? I remember seeing a thread a long while back where someone filled a small soup can with steel wool, and had that act as a catch can for extra oil. I'm assuming that it was done due to blow-by issues, but I cannot for the life of me find the thread. __________________ 2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd

03-28-2016, 02:33 PM	#29
65chevysub Registered User Join Date: Feb 2013 Location: Cottonwood, Arizona Posts: 1,382	Re: Road Draft Tube Conversion Sorry to break in on this thread. I have the ventilator that came with my 283 but it's not in the engine. My pcv is hooked up to the adapter and going to my carb. My question is, should the ventilator be mounted in the engine for everything to work properly, or will it work without the ventilator?_ I have the same problem of oil all over the back and botton of the engine) Is there a gasket for the block adapter?

03-28-2016, 11:36 PM	#30
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Road Draft Tube Conversion The canister that sits in the lifter valley and connected to the road draft port is there to help keep oil from being ejected/sucked thru that port. If your engine has a bit of blowby, there is only so much you can do to keep the outside of the engine clean of oil. __________________ 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



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