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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

what water pump

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Old May 26, 2015 | 06:52 PM
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69issofine
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From: pine city washington
what water pump

67 f-250 with a 300 out of a 91 original 67 water pump on the engine,it runs backward for the 91 but has the v-belt. where can i get the right pump for the 91 and have a v-belt? or do i change the harmonic balancer and alternator to a flat belt? i am at a quantry what should i do.
 
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Old May 26, 2015 | 06:59 PM
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I think you have to turn the engine around.
 
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Old May 26, 2015 | 08:07 PM
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well it turn over ok just can't get it to turn around.
 
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Old May 27, 2015 | 09:07 AM
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You should post in the inline 6 section. You can get more people with direct knowledge there. Not enough coffee for me yet this morning to wrap my head around what you are asking. If you are using v-belts then you use the older 67 style pump, and the newer pump with serp belt. I believe that is how it works. since the fan on the pump will be finned to turn with the direction of rotation.
You could have a head gasket issue or years of crap in the block.
 
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Old May 27, 2015 | 10:10 AM
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why did you put a 67 water pump on a 91 engine? why not put a 91 water pump on a 91 engine?
 
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Old May 27, 2015 | 10:33 AM
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he would have to stick with serp belt if he did that. Most likely all his other pulleys are v-belt. the 2 have different rotations due to belt routing.
 
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Old May 27, 2015 | 11:33 AM
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Originally Posted by 69issofine
67 f-250 with a 300 out of a 91 original 67 water pump on the engine,it runs backward for the 91 but has the v-belt. where can i get the right pump for the 91 and have a v-belt? or do i change the harmonic balancer and alternator to a flat belt? i am at a quandry what should i do.
The 4.9L (fuel injected 300) was produced from 1987-1996. It had a reverse (counter clock-wise) rotation water pump --with the serpentine belt setup.

If you currently have changed to a V-belt and a pre-EFI 4.9L water pump on the engine, it should be turning in the right direction (clock-wise rotation), as viewed looking at the engine from the front.
 
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