fan interchangeability
Elder User
Joined: Aug 2000
Posts: 597
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From: Burke VA
fan interchangeability
Hi all,
I just put a 351W in my 78 pick up. I upgraded to the serpentine belt system. I bought a 7 blade clutch fan off a 302 out of an LTD. I know it'll bolt up to my 351 but will th blades rotate the right way? this reverse flow stuff has me confused.
Jayson
I just put a 351W in my 78 pick up. I upgraded to the serpentine belt system. I bought a 7 blade clutch fan off a 302 out of an LTD. I know it'll bolt up to my 351 but will th blades rotate the right way? this reverse flow stuff has me confused.
Jayson
Senior User
Joined: Dec 2000
Posts: 385
Likes: 0
fan interchangeability
Both the water pump and the fan need to be reverse rotation. look at the belt path and you'll see it moves the pully for the water pump in reverse relative to the crank. you need late model pump and maybe timing cover too if that also was changed (you never know what ford has changed and is no longer compatable). I hope this helps.
Eric
Proud owner of a '73 F-250 4x4 High Boy, 460 V8, NP435, NP205
And a '68 Bronco 289 v8 , NP435 , Dana 20
Eric
Proud owner of a '73 F-250 4x4 High Boy, 460 V8, NP435, NP205
And a '68 Bronco 289 v8 , NP435 , Dana 20
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FTE Chapter Leader
Joined: Sep 2000
Posts: 3,863
Likes: 5
From: Beachville, Ontario
fan interchangeability
I discovered that a reverse water pump has a different bolt circle for the pulley than a regular water pump. If you have changed your water pump and timing cover AND the fan will bolt up to the pulley it just might be turning in the right direction.
1979 F150 Custom: 75 351W, Edelbrock & Holley
1987 F150 XLT Lariat: 88 351W EFI
Chevy 454: waiting for a truck (Mazda?Nissan?)
1979 F150 Custom: 75 351W, Edelbrock & Holley
1987 F150 XLT Lariat: 88 351W EFI
Chevy 454: waiting for a truck (Mazda?Nissan?)
Senior User
Joined: Dec 2000
Posts: 385
Likes: 0
fan interchangeability
OFT, I guess there's only one way to find out for sure, fire it up and check if it sucks air through the radiator and if it pumps water through the block and heads in the right direction. Nothing beats 'doing and seeing' for experience ;-). Good luck.
Eric
Proud owner of a '73 F-250 4x4 High Boy, 460 V8, NP435, NP205
And a '68 Bronco 289 v8 , NP435 , Dana 20
Eric
Proud owner of a '73 F-250 4x4 High Boy, 460 V8, NP435, NP205
And a '68 Bronco 289 v8 , NP435 , Dana 20
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