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Walker C-Ac503-1 Cobra 1939 Chevrolet Radiator w/ A/C Condenser

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Specs
Material Type:
Copper
Overall Height:
26.68
Overall Width:
17.13
Color:
Black
Transmission Cooler:
Yes
Tube Style:
Downflow
Sold in Quantity:
Each
Overall Thickness:
5.50
Row Quantity:
3
Finish:
Painted
Inlet Location:
Centered
Inlet Size:
1.50
Outlet Location:
Lower Right
Core Height:
22.00
Core Width:
16.88
Core Thickness:
2.00
Filler Neck Height:
.88
Shroud:
No
Radiator Style:
Single Pass
MFG. Part #:
C-AC503-1
Garage Sale:
No
Notes
1/8" NPT fittings for transmission cooler. 1/4" NPT fitting for drain. 1.25" wide mounting flanges on both sides. 5/8"-18 and 3/4"-16 inverted flare fittings for A/C.
Walker C-Ac503-1 Cobra 1939 Chevrolet Radiator w/ A/C Condenser
Walker C-Ac503-1 Cobra 1939 Chevrolet Radiator w/ A/C Condenser

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Walker C-Ac503-1 Cobra 1939 Chevrolet Radiator w/ A/C Condenser

Details

Reviews

Q & A

What's in the Box

Walker Cobra Series radiators boast a relatively thin, but efficient, high-flow copper core which is ideal for use with mild Small Block engines with stock or low compression ratios. Each radiator is built for a direct fit with heavy gauge steel side brackets and standard mounting holes pre-stamped. Plus, all radiators feature a built-in oil cooler for use with automatic transmissions. They work with original, reproduction, steel or fiberglass grille shells.

  • Copper core w/ 1-piece brass tanks
  • Vertical tubes every 1/4" and 17 fins per inch of height
  • Heavy duty 12 Ga. steel side brackets w/ pre-drilled holes
  • Use a 15-18 lb. radiator cap
  • Brass drain cock
  • Simple bolt-in install w/ no modifications to grille or grille shell

Chevy Chassis W/ Chevy Engine Application Chart (GIF)

Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.  

Specs


Warranties

Walker is now extending their warranty on all Cobra Series radiators to a full ten years, affecting all Cobra Series units manufactured after January 1, 2007.

Item Details

With A/C Condenser
Condenser Fittings: #6 and #8 O-ring design
Condenser Refrigerant: R-12 or R-134a

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Walker C-503-1 Cobra 1939 Chevrolet Radiator
                        

Walker Cobra Series radiators boast a relatively thin, but efficient, high-flow copper core which is ideal for use with mild Small Block engines with stock or low compression ratios. Each radiator is built for a direct fit with heavy gauge steel side brackets and standard mounting holes pre-stamped. Plus, all radiators feature a built-in oil cooler for use with automatic transmissions. They work with original, reproduction, steel or fiberglass grille shells.

  • Copper core w/ 1-piece brass tanks
  • Vertical tubes every 1/4" and 17 fins per inch of height
  • Heavy duty 12 Ga. steel side brackets w/ pre-drilled holes
  • Use a 15-18 lb. radiator cap
  • Brass drain cock
  • Simple bolt-in install w/ no modifications to grille or grille shell

Chevy Chassis W/ Chevy Engine Application Chart (GIF)

Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.  

Walker Z-503-1 Z-Series 1939 Chevrolet Radiator
                        

Walker Z-Series radiators feature a 4-row, high-flow copper core which is ideal for use with Big Blocks, blowers, and high compression engines. Built for a direct fit with heavy gauge steel side brackets and mounting holes pre-stamped. Includes a built-in oil cooler for automatic transmissions.

  • Works with original, reproduction steel, or fiberglass grille shells
  • Copper core w/ 1-piece brass tanks
  • Vertical tubes every 1/4" and 12 fins per inch of height
  • Heavy duty 12 Ga. steel side brackets w/ pre-drilled holes
  • Use a 15-18 lb. radiator cap
  • Brass drain cock
  • Simple bolt-in install w/ no modifications to grille or grille shell

Chevy Chassis W/ Chevy Engine Application Chart (GIF)

Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.   

Walker Z-Ac503-1 Z-Series 1939 Chevrolet Radiator w/ A/C Condenser
                        

Walker Z-Series radiators feature a 4-row, high-flow copper core which is ideal for use with Big Blocks, blowers, and high compression engines. Built for a direct fit with heavy gauge steel side brackets and mounting holes pre-stamped. Includes a built-in oil cooler for automatic transmissions.

  • Works with original, reproduction steel, or fiberglass grille shells
  • Copper core w/ 1-piece brass tanks
  • Vertical tubes every 1/4" and 12 fins per inch of height
  • Heavy duty 12 Ga. steel side brackets w/ pre-drilled holes
  • Use a 15-18 lb. radiator cap
  • Brass drain cock
  • Simple bolt-in install w/ no modifications to grille or grille shell

Chevy Chassis W/ Chevy Engine Application Chart (GIF)

Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance.  

Walker WS40 Radiator Fan Shroud, Style A, 20 x 21 Inch
                        

Maximize your radiators' effectiveness with a tight-fitting fan shroud. Use of these shrouds has produced temperature drops of up to 30 degrees!

Walker shrouds are vacuum formed from a very dense polyethylene. This high-impact, heat resistant material has a lightly textured, semigloss black finish. The cooling fan hole is not cut out so the installer can tailor that to the exact fan location and diameter.

See Application tab for application information.

Fan Shroud Size Chart (GIF)

Round Brass 15 Lbs. Pressure Cap
                        

Pressure caps for radiators featuring 7 or 15-pound capacity. Beautiful, smooth finish in brass.

  • 2-3/8" O.D. of cap top
  • 2-1/4" I.D. of cap top
  • Will fit a standard radiator neck
  • Sealing surface (which sits inside the neck) is 1-1/2" O.D.
  • Cap sides are 7/16" tall

Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles

Cooling Components CCI-1740 Cooling Machine Electric Fan, Style 40
                        At one time or another we all have had a car overheat. These fan/shroud combos are just the ticket to avoid having it happen again. These 2500 CFM pull-type fans measure 2-5/8" deep at the motor, 2-3/8" at the mounting brackets and 1-1/2" at the high impact shroud.
  • 24.44" wide x 19" high
  • Can be easily reduced in size to 21-5/8" wide x 17-1/4" high
  • 12 volt operation
  • Lower engine operating temperatures
  • Saves horsepower
  • Better fuel mileage
  • Constructed of high-impact ABS material

Note:  This fan motor requires the use of a 70 amp or larger fan relay.

Fan Application Chart (GIF)

Learn more about the importance of using a fan and shroud with our radiators by reading our tech article. Radiator Cooling Performance.

Hex Chrome Radiator Cap, 15 Lbs
                        

This unique hex style cap for radiators. Available in 15 lb. capacity. Brilliant chrome finish.

  • 2-3/8" O.D. of cap top
  • 2-1/4" I.D. of cap top
  • Will fit a standard radiator neck
  • Sealing surface (which sits inside the neck) is 1-1/2" O.D.
  • Cap sides are 7/16" tall

Learn more about cooling systems, how to choose the proper pressure cap, and how they work by reading our tech article. Cooling System Principles.

Red Line 80204 Water Wetter Coolant Additive
                        

Red Line Water Wetter Super Coolant additive is a unique wetting agent which reduces coolant temperatures by as much as 20° F. This is a liquid coolant treatment product which is designed to be added to solutions of antifreeze and water to help improve the heat transfer properties of glycol-based antifreeze. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze. Improves the ability of coolant to wet heat transfer surfaces by 50%.

  • Reduces or eliminates bubbles that form on hot metal surfaces to reduce coolant temperatures by up to 20°
  • Superior heat transfer properties compared to glycol-based antifreeze
  • Compatible with new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems
  • Improves heat transfer and reduces cylinder head temperature
  • Designed for use with all modern aluminum, cast iron, copper, brass and bronze cooling systems
  • Cleans and lubricates water pump seals
  • Reduces cavitation and complexes with hard water to reduce scaling
  • Does not lower cooling system below the thermostatically-controlled temperature
  • 12 fl. oz. bottle treats 12-20 quarts

Water Wetter Tech Info (PDF)

Learn more about how cooling systems work with proper coolant mixture and additives by reading our tech article. Cooling System Principles.