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Restored Corvette Wiper Motors

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Restoration Services and Pricing
by model year:
 
1953-1962

small gauges, tachs, speedos, cluster housings, wiper motors, horns, and dash inserts

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1963-1967

tachs, speedos, instrument clusters, clocks, wiper motors, headlight motors, glovebox doors, 65-67 consoles, radios, and horns

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1968-1982

speedometers, tachs, clocks, gauge clusters, oil gauges, climate control units, wiper switch plates, wiper motors, and horns

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Technical Information for
1963-1967 Corvette Wiper Motors

From our NCRS National 2003 Tech Session

1963-1964                1965-1967


1963-1964

  • WIPER MOTORS
    • A factory installed wiper motor with washer pump assembly was Part# 5044518.  The part number was stamped on the steel endcap: Image.
    • There are five (5) known case designs used with the 5044518 assembly.  
      •  Four had identification numbers, which could be found as raised castings on the aluminum housing adjacent to the end cap: Image, Image
        • 13 and 14 are found rarely.  It is assumed that the 13 case began appearing toward the end of the 63-64 production, as they are commonly found in 65-67s.
        • 15 and 16 were the most commonly used throughout production.
        • Cases without a raised casting number were commonly used on passenger car applications, but can be found occasionally on early-production 1963 Corvettes.  These are easily identifiable by the lack of a casting number, but also by a casting rib in place of a hollow "D" shaped opening in the uppermost mount bolt location. Image
  • WASHER PUMPS
    • All pumps were riveted with semi tubular rivets (hollow end facing out), not bolted to the mount plate.
    • The two (2) terminals for the harness connector were recessed in the lower edge of the pump housing.
      • They were positioned straight down and centered in the recess.
      • There was a gasket material seal/dust cover placed in the recess.
    • All washer pump covers had a raised pad with two (2) holes positioned at 1 and 7 o'clock when viewed from the front.  One-hole covers were not used on Corvettes.  Image
    • A green phosphate spring retainer clip is visible on the top edge of the pump.
    • Cast in the pump housing inboard of the washer valve was the following wording:  DELCO APPLIANCE ROCHESTER, N.Y. MADE IN U.S.A. PAT.PEND.
  • WASHER PUMP VALVES
    • The washer valve was a one-piece, yellowish, semi-transparent part with three (3) straight nipples.  Configuration of nipples would be two (2) smaller outlets arranged vertically, and a larger inlet position toward the front of the motor.
    • Attachment was made with four (4) indented small washer hex head tapping screws.
  • OTHER EXTERNAL FEATURES
    • Four (4) wires, black, green, yellow, and tan, were looped externally from underneath the pump to a C-shaped rubber grommet in the steel end cap.
    • A 1/2 inch wide brass ground strap looped from the terminal connection on the lower edge and was bolted underneath the brass L-shaped ground terminal.
    • Fasteners:
      • Pump covers used three (3) indented hex head (non washer head) machine screws.
      • Pump mounting was achieved with four (4) screws
        • The upper-left screw (as viewed from the front) is indented hex head (non washer head) and almost always had a GL head marking.
        • The remaining three (3) screws were indented hex head washer head machine screws.
      • Other head markings were used, including:
        •  Three (3) raised dots in a triangular pattern.
        • S
        • Plain
      • The end cap was retained with two (2) indented small washer hex head bolts with no head markings.
      • Four (4) aluminum rivets in a natural finish were used to hold the brush board in the end cap.  Screws or any other type fastener are incorrect.
  • EXTERNAL FINISHES
    • Aluminum motor and pump housings were natural.
    • All attaching hardware was cadmium plated.
    • Ground strap was brass (natural finish).
    • Ground terminal was brass (natural finish).
    • Pump coil spring clip was green phosphate.
    • End cap, pump cover and pump mount plate were cadmium-plated steel.
    • A correct motor will not have paint on any parts.
    • Occasionally an ink stamping is found on the lower part of the motor housing side facing toward the master cylinder (when viewed in the vehicle).
      • Both yellow and black ink were used.
      • The majority are very faint and illegible. Image
    • The four (4) exposed wires that enter the end cap should be free of cuts, abrasions, splices, repairs, etc.

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1965-1967

  • WIPER MOTORS
    • A factory installed wiper motor with washer pump assembly was Part# 5044602.  The part number was stamped on the steel endcap: Image, Image
    • There are two (2) case designs used with the 5044602 assembly.  
      • Case numbers can be found as raised castings on the aluminum housing adjacent to the end cap: Image, Image
      • Case numbers 13 and 14 were the only numbers to appear throughtout production.
  • WASHER PUMPS
    • All pumps were riveted with semi tubular rivets (hollow end facing out), not bolted to the mount plate.
    • The two (2) terminals for the harness connector were recessed in the lower edge of the pump housing.
      • They were positioned straight down and centered in the recess.
      • There was a gasket material seal/dust cover placed in the recess.
    • All washer pump covers had a raised pad with two (2) holes positioned at 1 and 7 o'clock when viewed from the front.  One-hole covers were not used on Corvettes.  Image
    • A green phosphate spring retainer clip is visible on the top edge of the pump.
    • Cast in the pump housing inboard of the washer valve was the following wording:  DELCO APPLIANCE ROCHESTER, N.Y. MADE IN U.S.A. PAT.PEND.
  • WASHER PUMP VALVES
    • The washer valve was a two-piece configuration.  The configuration of the nipples would be two (2) smaller outlets arranged vertically, with the larger inlet postion towards the front of the motor.
    • Attachment was made with four (4) indented small washer hex head tapping screws.
    • It is believed that the original two-piece style washer pump valves were an off-white or cream color.  Some of the darker coloring was due to age and extreme temperatures created under the hood area.  Unfortunately, "off-white" is not an easily described color.  The new service replacement part is of the same configuration as the original, however the color is much whiter than an original used part.  An NOS pump will also have a "less-then-pure white" valve, unlike the new service part.  This upsets the theory that the extreme temperatures alone caused the part to yellow, but supports the age factor.
    • Opinions are also challenged when an owner is given a point deduction when the valve appears "too white".  A restored part should look "as new from the factory" or "typical of factory production".  If this is the judging criterion, it is believed that a judge should not expect the vavle to appear aged.  Unfortunately this is one of those subjects that could be debated for hours with no resolution.  Typically, however, it is believed that the new two-piece white valve should not receive a point deduction on the 1965-1967, #5044602 wiper motors.
  • OTHER EXTERNAL FEATURES
    • Four (4) wires, black, green, yellow, and tan, were looped externally from underneath the pump to a C-shaped rubber grommet in the steel end cap.
    • A 1/2 inch wide brass ground strap looped from the terminal connection on the lower edge and was bolted underneath the brass L-shaped ground terminal.
    • Fasteners:
      • Pump covers used three (3) indented hex head (non washer head) machine screws.
      • Pump mounting was achieved with four (4) screws
        • The upper-left screw (as viewed from the front) is indented hex head (non washer head) and almost always had a GL head marking.
        • The remaining three (3) screws were indented hex head washer head machine screws.
      • Other head markings were used, including:
        •  Three (3) raised dots in a triangular pattern.
        • S
        • Plain
      • The end cap was retained with two (2) indented small washer hex head bolts with no head markings.
      • Four (4) aluminum rivets in a natural finish were used to hold the brush board in the end cap.  Screws or any other type fastener are incorrect.
  • EXTERNAL FINISHES
    • Aluminum motor and pump housings were natural.
    • All attaching hardware was cadmium plated.
    • Ground strap was brass (natural finish).
    • Ground terminal was brass (natural finish).
    • Pump coil spring clip was green phosphate.
    • End cap, pump cover and pump mount plate were cadmium-plated steel.
    • A correct motor will not have paint on any parts.
    • Occasionally an ink stamping is found on the lower part of the motor housing side facing toward the master cylinder (when viewed in the vehicle).
      • Both yellow and black ink were used.
      • The majority are very faint and illegible. Image
    • The four (4) exposed wires that enter the end cap should be free of cuts, abrasions, splices, repairs, etc.

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