Tweet
What is the correct application for this fan clutch - and in particular, is it correct for a 65 L76 (365 SHP) no air? Thanks, wiser friends.
-
65 MM Convertible, L76 (365 hp) -
Re: fan clutch pn 3916139 usage
Jack----
GM #3916139 was not originally used on a 1965 L-76. GM #3916139 was first used in PRODUCTION for 1968 Corvettes. It became the SERVICE replacement for the fan clutch used on most 1965 Corvettes with small block, GM #3814137, when the latter piece was discontinued from SERVICE in January, 1968. The 3814137 and the 3916139 were both stamped "CJ".
The GM #3814137 and GM #3916139 are VERY similar, if not identical, in external configuration. Both are Sweitzer-manufactured clutches that use a "bi-metallic", rectangular plate-type thermostat and both have "straight" fins. I believe that the shaft length is the same for both. If it's different, it's only slightly different. The total length of these units, measured from the face to the rear-of-hub flange, is 3-7/64".
Some 1965 Corvettes with small block may have originally used fan clutch GM #3814560. I believe that this is an Eaton or Delco unit using a coil type thermostat. The GM #3814560 was replaced for SERVICE in May, 1973 by the GM #3916141, which is still available from GM. There's no way to know which of the GM #3814137 or GM #3814137 was installed on any particular car unless you happen to have the known-original fan clutch.
For those that are interested, the fan clutch used for 1965 Corvettes with big block was GM #3857530 which, I believe, is an Eaton-manufactured, coil type thermostat unit. The GM #3857530 was replaced for SERVICE by the GM #3916141 in January, 1968. The GM #3916141 is an Eaton-manufactured unit with coil spring thermostat and slightly "curved" fins. I believe that it's very similar, if not identical, to the 3857530. Both the 3857530 and 3916141 units are stamped "CK". The total length of these units, measured from the face to the rear-of-hub flange, is 2-53/64".In Appreciation of John Hinckley -
Thanks Joe - Very informative! *NM*
65 MM Convertible, L76 (365 hp)Comment
Comment