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#1168825 06/10/2016 12:28 PM
Joined: Jul 2010
Posts: 96
S
Shop Shark
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Joined: Jul 2010
Posts: 96
Just bought a new fan for my 55 series ll pick up.
Original fan was damaged and although I straightened it, it looked a bit wobbly when idling. It just didn't run true.
New fan is 2" smaller in diameter than the original one. Seller says that's the only fan they sell and there have never been any problems.
Should I try to find one with the original diameter or will the 14" diameter work OK?
Many Thanks

sepp #1168829 06/10/2016 12:36 PM
Joined: Sep 2001
Posts: 29,269
Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
Posts: 29,269
I'd try to find the correct size fan blades, or one closer to the original 20" diameter.

http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0171.htm

Joined: Jul 2007
Posts: 444
'
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Posts: 444
Sepp,

According to the GM parts manual.
A 1955 & 1956 - 2nd. Series uses a 20 inch,
4 blade fan - GM part # 3716797

A brand new GM NOS 20" fan with 4 blades
is available from:

1.) Dan's GM Obsolete Parts
Chinook, Montana , USA
phone: 406-357-2615

Dan's has ( 1 ) - GM # 3716797) in stock.

2.) Chicago Auto Parts
Saint Anne, ILL. USA
phone: 815-614-3122

Chicago has ( 1 ) - GM # 3716797 in stock.

email address:

[email protected]


I've purchased NOS parts from both of the above.
Alway's great parts.

You can also try: Bruce Bugay in Virginia.
He buys & sells GM NOS parts.
phone: 1-804-752-6036
email: [email protected]
Bruce is retired from General Motors.
I've purchased many NOS parts from Bruce.
Always great parts.

Hope this info helps you out.

George '54 3600



Last edited by '54 3600; 06/11/2016 2:24 PM. Reason: add

1954 3600
A big help to many on the Bolt
Now cruising in
The Passing Lane
sepp #1168953 06/11/2016 6:21 AM
Joined: Apr 2015
Posts: 336
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PM sent


1959 3100 Apache Fleetside
sepp #1168968 06/11/2016 2:14 PM
Joined: Dec 2008
Posts: 1,922
P
'Bolter
'Bolter
P Offline
Joined: Dec 2008
Posts: 1,922
"there have never been any problems"
Your truck overheats = he has no problems.

A 14" fan in a 20" shroud means the shroud stops working.

A 20" fan flows more than twice as much CFM as a 14" fan (all other factors same).

sepp #1169863 06/17/2016 8:56 AM
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Posts: 444
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GM - 4-blade Fan - GM # 3716797

SUPERSEDED: to GM # 3739015 on ( 3 - 1 - 1958 )

photo@photobucket

http://i669.photobucket.com/albums/...NOS/GM_%203739015_%20NOS_zpsfyrjogdz.jpg


There is a GM NOS Four Blade 20 " Fan - GM # 3739015 on ebay right now

for $59.00 or make an offer

Go to ebay & in the search box type - 3739015

link: http://r.ebay.com/OW8uC7


Dan's Obsolete & Chicago Auto Parts - both have

( 1 ) GM NOS Fan # 3739015 in stock


George '54 3600

Last edited by '54 3600; 06/17/2016 11:00 AM. Reason: add

1954 3600
A big help to many on the Bolt
Now cruising in
The Passing Lane
sepp #1170075 06/18/2016 7:52 AM
Joined: Apr 2015
Posts: 336
C
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You should put the proper size fan on the truck.


1959 3100 Apache Fleetside

Moderated by  Phak1, Woogeroo 

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