1931 Radiator Fan

(and other substitute years)


The proper fan blade for Chevrolet passenger cars in 1931 was a two bladed fan.

Most people replaced this with a four-bladed fan at some point in time.  The cooling improvement is very noticeable.
In later years, this 4-blade fan was the only replacement available from Chevrolet.

<click on photos to enlarge them>

 

SHAPE Usual Condition Restored Close-up
1
2 Bladed
no photo
2
90deg Cross
3
 
YEAR MODEL

SHAPE

CENTER PILOT HOLE BLADE LENGTH NUMBER OF BLADES
1929-31 Pass 1 1 1/18" 15 3/4" Two
1929-31 Pass 2 1 1/18" 15 3/4" Four (Replacement)
1931 Truck* 2 1 1/18" 15 3/4" Four
1932 Pass 2     Four
1933-36 Pass 3 1 1/8" 15 3/4" Four
1933-36 Truck 3 1 1/8" 16 1/4" Four
1937-54 Pass 3 1"   Four
           
From the 1929-40 MASTER PARTS PRICE LIST CATALOG
YEARS BODY   PART NUMBER    
1929-36 Passenger   836968    
1929-31 Trucks   836336    
1932-36 Trucks   837448    


Notes:  * Dec 2010 - Early truck configuration now confirmed.  "Chevrolet Engineering Features" book lists 4 blade fan as new in 1931 for trucks (commercial vehicles).  Reference Page 72.  The 1931 Repair Manual on page 37 shows a two bladed fan (shape 1)  for 1931 LT trucks.  The 1932 Repair Manual shows a four-bladed fan (shape 2).  By the 1934 parts books, it lists the more modern four-bladed fan (shape 3).

  

Page last updated:  01/30/2011

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