Have a problem with the pulleys from the74 302. I was trying to use on 88 5.o h0. I have a standard water pump (43272 from napa) on the 74 timing cover. There is no way I'm going to have these fit. I could use some advice. I had a really hard time getting the water pump and would probably like to keep it. Should i get a under drive setup or can i just find a smaller water pump pulley?
Did you not get the matching pulleys from the '88 block? 79 and newer 302's had different pullys so they wont work with the pre 79 ones. water pumps are also the same way..in case you got a pre '79 pump...so the best thing is to just hit the junkyard and get the pully or check online for someone selling 302 parts.
so. what your saying is that i need a pre 79 pump to work with the 74 pulleys? I have the pulleys from the 88. they are not v -belt. i want to keep the look of the v belt.
are you just running...alt and water pump? if so, measure the to see how much deeper the pulley needs to be, add that to the depth of the pulley and post that measurement. you may have to get a...twin belt pulley...that's what I found to fit my motor. it was the inside grove that fit, so I removed the outside grove . when I was looking for a pulley, I found there are like a zillion different sizes...depths and diameters... ......
Yep, that's his problem. The W/P ran on the same belt as the P/S pump in 74. I've got a few extra W/P pulleys that'll fit. The W/P pulleys from any of the 351W or 351M/400 will work too if I'm not mistaken.
The pump lengths are all the same up til the appearance of the 89 T-Bird setup (SN95) and the Explorer FEAD. Ford varied the pulley offsets for both the crank and waterpumps over the years.
I'm only running the water pump and alternator from the crank. I believe they would line up for the v belt if they were smaller. The crank pulley is 6 3/4 Water pump pulley is 7 in. depth 1 3/4 the overlap of the two is 1 inch. I guess I'll look around for a water pump pulley that's about 5-5 1/2 keeping the same depth. By having a smaller pulley, how is that going to affect the water pump? The serpentine ones are crank 6 inch water pump 4 3/4
A smaller W/P pulley will spin the pump faster, moving more coolant and at the same time spinning the fan faster, moving more air. It's a win-win situation
am I correct in saying...if the water pump pulley and crank pulley are the same diameter, the fan RPM would be that of the motor...
Went to the wreckers today. didn't find a good ford pulley. I did find something from a Mazda mpv 3.0 eng. It is very close to the ford serpentine pulley. but not perfect. If I don't find anything else I may have to mess with it. I would have to drill some holes and provide some kind of spacer to line up with the crank pulley. Tell me what you think?
The mazda pulleys I seen there were 4.5 in and 5in. I took home the 5in one. maybe I'll have to go back a get the smaller one if there is any clearance problems. I also noticed that the 74 pulley holes are completely wrong. They must have sold me the water pump for the 88 eng. seeing that the holes match up better with the ford serpentine pulley.
dont try to make something fit. I had the same problem when I got my circle track water pump. I went to a friends house and he had a pulley off an old mustang that worked just fine. I did have to drill out the center hole a little to make it fit over the water pump shaft since it was so much bigger in diameter. all the holes lined up perfectly and it brought my belts in line the only difference was it had more of a dome shape from front to back
