The stock fan for both the 216 and 235 engines is a 4 blade, 18" unit according to the shop manual (page 6-88).
I believe the issue may be the stock location on a 55-62 235 water pump is too low creating the problem.
Last edited by Phak1; 02/16/20241:41 PM.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum