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Carter W-1 carburetor tune up. #267661
01/16/13 08:40 AM
01/16/13 08:40 AM
Joined: Apr 2010
Posts: 15
netherlands
T
TORPAERO Offline OP
Grease Monkey
TORPAERO  Offline OP
Grease Monkey
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Joined: Apr 2010
Posts: 15
netherlands
Looking for complete adjustment/tune up info for a Carter W-1 carburetor used on a 1948 Chevrolet Fleetline Aerosedan.

Re: Carter W-1 carburetor tune up. [Re: TORPAERO] #267695
01/16/13 06:55 PM
01/16/13 06:55 PM
Joined: Sep 2005
Posts: 580
Peoria, Illinois
Daryl Scott Offline
Daryl Scott  Offline

Oil Can Mechanic
Joined: Sep 2005
Posts: 580
Peoria, Illinois
Try this document HERE.


Re: Carter W-1 carburetor tune up. [Re: Daryl Scott] #268110
01/21/13 04:40 AM
01/21/13 04:40 AM
Joined: Feb 2002
Posts: 619
West Bend, WI
FLEET 47 Offline
Oil Can Mechanic
FLEET 47  Offline
Oil Can Mechanic
Joined: Feb 2002
Posts: 619
West Bend, WI
Excellent Information!!!! Thank you for sharing it!!



"Heaven is Driving my 47"
With that "GOOD GULF" gasoline.
http://www.gulfhistory.org/?
Re: Carter W-1 carburetor tune up. [Re: Daryl Scott] #276092
04/22/13 12:44 AM
04/22/13 12:44 AM
Joined: Jan 2009
Posts: 542
PA.
XLVIIdriver Offline

Oil Can Mechanic
XLVIIdriver  Offline

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Daryl
Just sent you a PM


Re: Carter W-1 carburetor tune up. [Re: XLVIIdriver] #322846
10/31/14 01:50 AM
10/31/14 01:50 AM
Joined: Oct 2007
Posts: 1,833
MI, USA, Midland
Mike Buller Offline

ChatMaster - 1,500
Mike Buller  Offline

ChatMaster - 1,500
Joined: Oct 2007
Posts: 1,833
MI, USA, Midland
Besides following the recommendation in your manual, and other articles like the excellant one in Daryl's post another important part to rebuilding your carb is the tools you choose to do the job. Always use a tight fitting screw driver tip. If you do not have one go out and buy screw drivers to fit your screws or grind the tips down on the screwdrivers you have to fit snugly. I also have ground the sides off of one of my screwdrivers to accommodate removal of the inlet and outlet check valves and the nozzle screw.

The best screwdrivers have shafts on them that allow you to use a Crescent wrench to turn the screwdriver to remove the screw. I always prop the carb against my large vise so it does not move while I am putting maximum downward pressure on a screw head. I then turn the screwdriver with the Crescent wrench. You will hear a popping sound when the screw lets go. That is music to your ears.

I work on a clean white tagboard surface so I can see the parts easily as I remove them or they fall off. The inside of a yard political campaign sign works great. I place each part in a white plastic meat container as I remove it, the kind you get from the grocery store with your hamburger.

I also use a needle point electrical pliers to take off all the small clips. Try to be very careful when removing the clips, they bend easily and like to fly away. You will soon find a good name for the clips when they fly off somewhere and you can not locate them. An old timer called his "Jesus Christ" clips. I call mine "Dammit" clips.

I just took apart a carb I brought home from a salvage yard last week. Fortunately, it had no rust in the entire throat except for a frozen up throttle valve. I got some used transmission fluid and soaked the entire carb in it a couple of days. I lightly tapped on the ends of the throttle lever and finally it came a little loose. I then tried to open and close the throttle valve using the lever and it finally moved. I kept it well lubricated as I continued to work it loose and now it works like it was brand new. I have found that if the air filter is left on the carb, the carb does not seem to rust up so much. So if you are walking through a salvage yard and the filter is still on the carb you will probably find a salvageable carburetor.

I do lightly sandblast the worse rust and grime off the carb and also soak it in carburetor cleaner according to the recommended time on the cleaner. Usually, half an hour is recommended. My gallon can of cleaner is over 10 years old. It recommends rinsing the carb in water and wire brushing off any remaining grime.

I hope others will also comment on their best practices. I still have a lot to learn about all the reconditioning procedures.

Good luck, Mike


Mike 41/77 Chevys
Re: Carter W-1 carburetor tune up. [Re: Mike Buller] #350624
09/03/15 04:29 PM
09/03/15 04:29 PM
Joined: May 2010
Posts: 571
Northern California, USA
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brino Offline
Oil Can Mechanic
brino  Offline
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Joined: May 2010
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Northern California, USA
Torpaero,

If you need one I have an extra all metal genuine Carter 25-33 needle and seat. According to the carburetor gurus gasoline with ethanol added attacks the rubber tip needles.

If your throttle shaft is loose bushings for Rochester Quadrajets are an ideal way to restore a proper fit. A snug throttle shaft vastly improves idle quality because idle air is coming through the carburetor orofices rather than along the throttle shaft bore.

Ray W

Re: Carter W-1 carburetor tune up. [Re: brino] #353401
10/07/15 02:02 PM
10/07/15 02:02 PM
Joined: Apr 2007
Posts: 41
Ohio, USA
Mike Danner Offline

Shade Tree Mechanic
Mike Danner  Offline

Shade Tree Mechanic
Joined: Apr 2007
Posts: 41
Ohio, USA
Would the Rochester Quadrajet bushings referenced in an earlier post that were used to repair a loose throttle shaft on the W-1 have a part number? And can they be purchased individually?

Re: Carter W-1 carburetor tune up. [Re: Mike Danner] #353488
10/08/15 04:06 PM
10/08/15 04:06 PM
Joined: Apr 2007
Posts: 41
Ohio, USA
Mike Danner Offline

Shade Tree Mechanic
Mike Danner  Offline

Shade Tree Mechanic
Joined: Apr 2007
Posts: 41
Ohio, USA
Thanks, found it myself. Quadrajetparts.com if anyone's interested.

Re: Carter W-1 carburetor tune up. [Re: TORPAERO] #358723
12/24/15 03:30 AM
12/24/15 03:30 AM
Joined: Feb 2004
Posts: 73
Eldon, Missouri
C
carbking Offline
Shade Tree Mechanic
carbking  Offline
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Joined: Feb 2004
Posts: 73
Eldon, Missouri
While needle-nosed pliers can be used for removing the spring clips (pin springs); there is a MUCH better tool available from Snap-On.

I don't know the name of the tool or the number, but the tool is a small brass tube approximately 6 inches long with a spring-loaded clip retainer on one end and a push button on the other.

Push the button, and it opens the retainer on the far end, allowing the rebuilder to grasp the pin spring. Releasing the button then causes the retainer to close and locks the pin spring to the tool. The pin spring can then be installed or removed as necessary. Once the operation is complete, pushing the button will unlock the tool so the pin spring is released.

The tool is relatively expensive for what you get (about $16. the last time I checked), but if you rebuild carbs and count your time for anything (the time lost when looking for the dropped pin spring), it is the cheapest tool you will ever buy!

As to throttle bushings:

The design tolerance from the throttle shaft to the throttle body is 0.004~0.006 inch. An additional 0.003 will not cause problems. Check the clearance with a dial indicator. If the clearance does not exceed 0.009 inch, no machine work is necessary. If the clearance does exceed 0.009 inch: 999 times out of 1000 it will turn out to be a worn throttle shaft. Of the hundreds of W-1's I have rebuilt, I have YET to see one that required bushing!

MUCH more common to need to replace the clamp on throttle arm on the back side of the throttle shaft and the "L" shaped rod that connects this arm to the countershaft arm.

The most common issue with the W-1 that bites the sometime rebuilder is the clogging of the horizontal idle cross passage at the top of the cast iron casting. Very small passage, and if clogged, the idle circuit will not function.

And if you feel you absolutely MUST place bushings in the throttle body NEVER use a drill bit (use an end mill) and NEVER mill clear through the throttle body. Doing so will leave an internal vacuum leak that will prevent a proper idle being obtainable. No offense meant to anyone, but this operation is a machine shop operation to be done by a machinist with a good milling machine! Just as important to the operation of the carburetor as boring the block is to an engine rebuild!

Jon.


Good carburetion is fuelish hot air
Re: Carter W-1 carburetor tune up. [Re: brino] #358724
12/24/15 03:42 AM
12/24/15 03:42 AM
Joined: Feb 2004
Posts: 73
Eldon, Missouri
C
carbking Offline
Shade Tree Mechanic
carbking  Offline
Shade Tree Mechanic
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Joined: Feb 2004
Posts: 73
Eldon, Missouri
Originally Posted By: brino
Torpaero,

If you need one I have an extra all metal genuine Carter 25-33 needle and seat. According to the carburetor gurus gasoline with ethanol added attacks the rubber tip needles.

Ray W


Ray - no offense, but ethanol is harder on steel needles than it is on modern soft-tipped needles:

http://www.thecarburetorshop.com/Steel_needles.jpg

Jon.


Good carburetion is fuelish hot air
How to find TDC for a beginner? [Re: TORPAERO] #360153
01/14/16 05:09 PM
01/14/16 05:09 PM
Joined: Dec 2015
Posts: 21
tennessee, usa
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rsh47 Offline
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rsh47  Offline
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tennessee, usa
I am going to install points on my '47 Fleet Master (first for me). I understand that the points should be open in order to set the correct gauge (.017 I think). I think I can bump the starter until I get it on top of a lobe, then check the gauge. I do not think it is necessary to have it on TDC, but I just wanted to know how to determine TDC.

thanks
rsh47

Re: How to find TDC for a beginner? [Re: rsh47] #360155
01/14/16 05:13 PM
01/14/16 05:13 PM
Joined: Nov 2001
Posts: 28,714
Eagle Point, Oregon
Junkyard Dog Offline

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Junkyard Dog  Offline

Tech Advisor
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Posts: 28,714
Eagle Point, Oregon
To determine TDC, remove all of the spark plugs. Put your thumb on the number one cylinder. Bump the engine over until the compression on number one cylinder blows your thumb off of the spark plug hole. The timing mark should line up near the pointer. Once the timing mark is even with the pointer you are on TDC. The rotor on the distributor should also be pointing to the number one tower on the distributor cap.

laugh wink beer2


The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"
Re: How to find TDC for a beginner? [Re: Junkyard Dog] #360202
01/15/16 01:12 AM
01/15/16 01:12 AM
Joined: Dec 2015
Posts: 21
tennessee, usa
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rsh47 Offline
Grease Monkey
rsh47  Offline
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tennessee, usa
Thanks for your reply. This sounds like simple way to determine TDC.

Thanks
rsh47

Re: How to find TDC for a beginner? [Re: rsh47] #398291
11/15/17 08:56 PM
11/15/17 08:56 PM
Joined: Sep 2002
Posts: 1,674
Bracebridge Ontario,Canada
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old216 Offline

ChatMaster - 1,500
old216  Offline

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Bracebridge Ontario,Canada
Isn't the timing mark at 5 deg before TDC. I believe TDC is labeled as UDC on the flywheel.


My 1951 1 Ton is now on the road! My 38 Master 4 Door is also now on the road .
Re: How to find TDC for a beginner? [Re: carbking] #403128
02/06/18 06:39 PM
02/06/18 06:39 PM
Joined: May 2010
Posts: 571
Northern California, USA
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brino Offline
Oil Can Mechanic
brino  Offline
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Northern California, USA

"Ray - no offense, but ethanol is harder on steel needles than it is on modern soft-tipped needles:"

Good morning Jon. No offense taken. In fact, just the opposite. I really appreciate your knowledge on the subject. My mistake was accepting as fact an oft stated opinion on this forum.

I have a home machine shop and I have put bushings in W1 throttle shaft bores using a long reamer to get a true hole all the way through and in the hole in the float bowl cover that the accelerator pump/metering rod bell crank shaft rotates in.

Thanks for enlightening me on the needle/seat issue.

Ray W

Re: How to find TDC for a beginner? [Re: TORPAERO] #403131
02/06/18 07:39 PM
02/06/18 07:39 PM
Joined: Jan 2002
Posts: 25,126
West Allis,Wi.
Chev Nut Offline

Chev Nut  Offline


ChatMaster - 25,000
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West Allis,Wi.
I just turn over the engine until the points open. Then with one hand turn the rotor (there is about 1/4"of free turning) so points are open the greatest amount and with the other hand measure the gap with a feeler gauge. For new points use .021" for the gap for new points as the gap will lessen with use. Also coat the cam lobes with a film of grease to prevent too fast of wear down of the rubbing block.
The timing should be reset after installing points as a change in gap changes the timing.
TDC has no effect on the gap because TDC does not necessarly mean the points are open at their widest.

Last edited by Chev Nut; 02/06/18 07:41 PM.

Chevgene
Re: How to find TDC for a beginner? [Re: TORPAERO] #403141
02/06/18 09:09 PM
02/06/18 09:09 PM
Joined: Feb 2008
Posts: 3,389
Hendersonville, N.C.
bobg1951chevy Offline

ChatMaster - 3,000
bobg1951chevy  Offline

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Posts: 3,389
Hendersonville, N.C.

If a commitment is made between you and your car ....... not to leave one another, take the time to purchase the reprint of the GM SERVICE MANUAL for your specific year Chevy.

YOUR car will thank you.


1951 Chevy Styleline Deluxe 2 door sedan. Purchased in 2000.
1951 Chevy Styleline Deluxe Sport Coupe. Purchased in 2014.
1969 Chevy Corvair 500 Coupe. Purchased in 2017.

Re: How to find TDC for a beginner? [Re: TORPAERO] #403261
02/09/18 01:49 AM
02/09/18 01:49 AM
Joined: Oct 2009
Posts: 934
Hubbard,Ohio
chevy1937 Offline

ChatMaster - 750
chevy1937  Offline

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Posts: 934
Hubbard,Ohio
When I wanted to find exact TDC I bolted a degree wheel to the damper. Then I had a broken spark plug with a bolt threaded down through it that would hit the top of the piston. I put this plug in number one and turn the engine by hand till it stopped. Then mark the wheel and turn the engine the opposite way till it stopped. Half way between the stops is TDC.

Re: How to find TDC for a beginner? [Re: chevy1937] #403360
02/11/18 01:21 AM
02/11/18 01:21 AM
Joined: Sep 2007
Posts: 169
Ohio
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Phil Lipton Offline
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Phil Lipton  Offline
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Ohio
When I took Auto Mechanics in High School ( I won't say the year, but the dinasauers were gone!) we were taught that with the valve cover removed, turn
the engine over and watch the rocker arms on No.6 cylinder; No. 1 and No. 6 cylinders are 'running mates', so,when No. 6 cyl exhaust valve just closes,
No.1 is on top dead center compression, with both valves closed! There is no way anything can get damaged this way, and it is extremely accurate!


flip

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