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draft tube fix?
#1314594 Mon Jun 17 2019 11:35 AM
Joined: May 2019
Posts: 26
G
Gary P. Offline OP
Wrench Fetcher
I have a '46 pickup with "53 235.
After installing an Okie bushing in my torque tube, I went to a car show that was 100 miles away. Everything went well with the gear oil and the seal. Thanks for all of the advise on this great forum.

I was going on mostly back roads at about 50-55 mph. Cruising well but maybe a little above its "comfort zone".
When I got to Sea Isle City, NJ, I checked the oil and I was down almost a quart.(but the undercarriage is well lubricated smile )
I'm fairly certain that's if it's burning any oil it is minimal. I do have a a small rear main leak but almost all of this leak is coming from the draft tube. There are no baffles in the tube itself and I really do want to keep this truck as stock as possible. I have seen, somewhere, about installing some sort of device/baffle/mesh in the tube to slow this down. I'm not really keen on the pcv valve idea as I promised my Dad that I would keep his truck as stock as possible.
If I can do something before the return trip in two days, I could get a good test trip when going home.
Any comment are welcome.
.

Attached Files
20190617_061749.jpg (138.5 KB, 290 downloads)
Sea Ise 2019.JPG (133.2 KB, 287 downloads)

1946 1/2 ton Chevy Pickup
1953 235 cu in
3 speed on the floor
Re: draft tube fix?
Gary P. #1314596 Mon Jun 17 2019 11:51 AM
Joined: Sep 2001
Posts: 30,570
ace skiver


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: draft tube fix?
Gary P. #1314603 Mon Jun 17 2019 12:49 PM
Joined: Sep 2009
Posts: 321
G
Shop Shark
http://devestechnet.com/Home/PCVInstall

Possibly an option?

Gorgeous truck by the way, love the dark blue and black 2-tone

Last edited by Green_98; Mon Jun 17 2019 12:49 PM.

-Patrick
1953 Chevrolet 3100
261 / 4-speed / 4:11 / Commercial Red

Re: draft tube fix?
Gary P. #1314606 Mon Jun 17 2019 01:05 PM
Joined: Sep 2001
Posts: 30,570
ace skiver
"In actual fact, there was a stock PCV system available on some AD models in 1954, but good luck finding one!" (Deve)

There are minor (somewhat insignificant) mistakes in Deve's write-up :

- a PCV system was available on slow-moving delivery trucks as of 1948 and later years (it became standard equipment in those slow-moving, door-to-door milk/bread delivery trucks {"step vans")).

- a PCV system was available as an option on ALL model 1954 trucks (and probably later).

A PCV system is a very valuable (necessary) item if you do a lot of slow-speed, and/or, stop and go driving.
Using/adding a PCV system, if done properly, causes no harm.
However, there is no need to add one for most old trucks, that have engines in good condition.

Consider your driving conditions, and do what you have to do (and, if you do not need the system, do what you like).


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: draft tube fix?
Gary P. #1314607 Mon Jun 17 2019 01:12 PM
Joined: Jul 2013
Posts: 172
N
Shop Shark
As a temporary fix, you can pull the tube and stuff a copper or stainless steel pot scrubber pad in there to act as a baffle, assuming the factory in-block baffle ha gone missing.


NHluvstruck...
1951 3100 5-window
https://stonefacegarage.wixsite.com/mysite
51 Chevy Restoration Page
Re: draft tube fix?
Gary P. #1314609 Mon Jun 17 2019 01:22 PM
Joined: Sep 2001
Posts: 30,570
ace skiver


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: draft tube fix?
Gary P. #1314615 Mon Jun 17 2019 02:07 PM
Joined: Feb 2004
Posts: 21,243
H
Boltergeist
As a temporary "get it home" fix, stuff a Chore Boy scrubber down the draft tube. Once you get it back on your home turf, deal with the real problem- - - - -an engine with enough blowby to push oil out of the draft tube is way overdue for a ring job.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: draft tube fix?
Gary P. #1314628 Mon Jun 17 2019 03:21 PM
Joined: May 2019
Posts: 26
G
Gary P. Offline OP
Wrench Fetcher
I just got back from the grocery store and got a stainless steel scrubby and put in the draft tube. We'll see how much this slows down the oil leak.

I have been thinking about "WHY" this is happening. I will adjust the valves and do a compression check when I get home. I agree. That is way too much oil to be losing.


1946 1/2 ton Chevy Pickup
1953 235 cu in
3 speed on the floor
Re: draft tube fix?
Gary P. #1314629 Mon Jun 17 2019 03:34 PM
Joined: Feb 2004
Posts: 21,243
H
Boltergeist
I'd recommend a cylinder leakdown test instead of or in addition to a compression check. Roll the engine over until the distributor rotor points to a plug wire, put the transmission in high gear, set the parking brake and/or chock the wheels, and put air pressure into the cylinder through the spark plug hole. Most compression testers with screw-in pressure hoses can be adapted to do this. Listen at the carburetor, tailpipe and oil filler for air leaks. Follow the firing order around to test all the cylinders for leakage. If you set the air pressure to 100 PSI with no air flowing, the pressure the cylinder maintains will give you a "percentage of leakage" number. For instance, a cylinder that holds 90 PSI has a 10% leakdown rate. I like to see 5% or less on a healthy engine.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: draft tube fix?
Gary P. #1314689 Tue Jun 18 2019 12:36 AM
Joined: Sep 2006
Posts: 3,742
B
Shop Shark
Some pictures for those wondering how the set-up looks.
https://www.flickr.com/photos/advance-design_parts_co/8129417263/in/album-72157631868452754/
There are several, an install on a 1954 2-ton I parted some years back. There are also pictures of an accessory NOS kit of 1953 vintage.
The 1948 delivery install.
https://www.flickr.com/photos/advance-design_parts_co/8666488508/in/album-72157633290718528/

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