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Username Post: gas shut-off valve        (Topic#353799)
Posts: 8

Reg: 08-26-18
11-07-18 06:15 PM - Post#2750709    

The gas shut-off valve at the tank outlet on my 1937 Chevy car appears to have a slight leak.
I checked with Chevys of the 40s for a replacement and they only list a shut-off valve that connects the tank to the intermediate fuel line for a '49 to '54 truck that comes with a 3/8" threaded pipe that connects into the bottom of the tank.
Does anyone know the connection size on a stock 1937 Chevy? I don't want to take the old shut-off valve off until I know that I have the correct replacement parts.


Ultra Senior Member
Posts: 12285

Loc: Wisconsin..USA
Reg: 09-27-02
11-07-18 08:50 PM - Post#2750727    
    In response to arnie

The only 1937 car to have a shut-off valve is the business coupe due to the location of the tank.
It is 2 11/16" long,1/8" pipe and 1/2 - 24 threads, fit 1937-1939 coupes and sedandelivery.

ChevGene 1934 Master sedan 1939 Master DeLuxe Town Sedan 1950 Styline DeLuxe Power Glide 1957 Nomad 283 PG 1963 Corvair Convertible

Posts: 8

Reg: 08-26-18
11-09-18 11:07 AM - Post#2750893    
    In response to Gene_Schneider

Gene, That's most helpful. Do you know where I can purchase a replacement shut-off valve or can I just eliminate it?

"9th Year" Silver Supporting Member
Posts: 1184
Loc: DFW Texas
Reg: 02-24-05
12-04-18 07:57 AM - Post#2753309    
    In response to arnie

Have you tried to tighten the packing nut?

1928 Chevy Coupe
1942 Chevy Special Deluxe Coupe
1955 Chevy Bel Air HTP
1970 El Camino
1990 F##d Mustang Convertible

Life is like a roll of toilet paper the nearer the end the faster it goes.

Posts: 8

Reg: 08-26-18
12-06-18 05:29 PM - Post#2753666    
    In response to Rustchips

Thanks, it's worth a try.

Posts: 29

Age: 71
Loc: Bracebridge Ontario Canad...
Reg: 04-04-13
12-15-18 01:44 PM - Post#2754602    
    In response to arnie

My 1951 GMC (Canadian) 1 Ton has a similar shutoff on the bottom of the tank. The vendors that offer parts for those trucks sell the shut off valves.

Posts: 8

Reg: 08-26-18
12-16-18 05:06 PM - Post#2754724    
    In response to 38TownSd

Gene, 1/8" pipe from the tank seems rather small. I tried measuring the line with my calipers and it seems to be much larger. Where did you get your information?

Rustchips,I tried tightening the packing nut and that seemed to have stopped the leak however the opening in the floor where the fuel line goes up into the tank ( the tank is above the floor) seems like it could still be moist. I will continue to monitor it.

38TownSd,Chevys of the 40's was the only supplier of a shut-off valve that I was able to find and they tell me it doesn't fit a '37 coupe, only
'49-'53 trucks.

Posts: 427

Loc: Portland,Or
Reg: 12-06-09
05-01-19 08:24 AM - Post#2765471    
    In response to arnie

1/8" pipe fittings are actually pretty large. They measure .407" OD, which is plenty of ID for stock fuel draw. Too small for a V8 that sucks more fuel.

1969 Suburban 2wd 350
1939 Chevy pass. coupe 350/700R4
1937 Austin gasser 327/TH350


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