1687 1971-1977 Inline 6 cylinder 250/4.1L 4 1/4" tall water pump timing chain cover 82 Includes Installation Tool No

82 Includes Installation Tool No Jiggle Pin No Number of Check Valves None Number of Gaskets None Number of Seals None OE Comparison Rating OE Quality Type OE Type Thermostat Make Year ALFA ROMEO 1962-1971 AM GENERAL 1970 AMERICAN MOTORS 1961-1984 AUSTIN 1960-1970 AUSTIN-HEALEY 1953-1969 BMW 1971 BUICK 1935-1992 CADILLAC 1963-1993 CHECKER 1959-1976 CHEVROLET 1942-1997 CHRYSLER 1979-1987 DODGE 1961-2003 EAGLE 1988 FIAT 1959-1974 FORD 1948-2000 GEO 1989-1991 GMC 1959-2007 HILLMAN 1962-1965 HYUNDAI 2000 INTERNATIONAL 1969-1974 JAGUAR 1950-1974 JEEP 1946-2005 KAISER-FRAZER 1948-1954 LAND ROVER 1970-1997 LINCOLN 1969-1985 MERCEDES-BENZ 1955-1962 MERCURY 1949-2004 MG 1953-1976 MORGAN 1979-1981 MORRIS 1958-1970 NASH 1955-1957 OLDSMOBILE 1954-1992 OPEL 1950-1972 PACKARD 1953-1958 PLYMOUTH 1960-1989 PONTIAC 1937-1993 ROVER 1971 SAAB 1960-1974 SIMCA 1969 STUDEBAKER 1947-1966 TRIUMPH 1954-1978 WILLYS 1942-1954 Alternate/OEM Part Number(s): 13356

General Specifications: Type of Material of Pump Body Aluminum Number of Blades on Impeller 8 CNC Aluminum Direction of Rotation CCW Fan Hub Working Height 3-3/4" Shaft Diameter 5/8" Inlet Outside Diameter 1 3/4" Hose Connections: 1st 2nd Gender F NA Diameter 5/8" NA Threaded Yes NA Other Special Features: 8 blade CNC machined impeller

6L OLDSMOBILE DELTA 88 1975 V8 400 6

7L CHEVROLET LAGUNA 76-73 V8 400 6

k3500 pickup

1687 1971-1977 Inline 6 cylinder 250/4.1L 4 1/4" tall water pump timing chain cover 82 Includes Installation Tool NoIf you have the 1971 1977 Chevy truck with a 250 4. 1L you might be finding it runs a little hotter now. You might also find heat cycling is occurring with your riser set up. Either way, the 1687 can help the problem. We designed a impeller with an increased vane count and a reduced impeller vane clearance to take care of both problem. It achieves greater flow rates, higher head pressure and a more efficient flow and squeezes that air out of your