water pump pulley

Mo65 · 11-02-1999, 05:31 PM

Hi, I have a 302V8 that I installed on my 65 Mustang. I've already changed the oil pan, timing cover and water pump. I left the original 302 4 hole harmonic balancer and pulley but changed water pump pulley to a 289 double grove pulley. The groves seemed to match but the size of the harmonic balancer of the 302 seems to ne to large; does not allow the water pump pulley rotate freely. For those guy out there that have adapted a 302 on a 65 Mustangs, what are my alternatives to make this thing work.

The car is equiped with the original power steering and factory AC.

Thanks

65Matt · 11-02-1999, 11:45 PM

1. Use the 302 water pump pulley. Besides it binding, the 289 one may drive the water pump too fast or slow. I think this would give you the least amount of headaches, as long as your PS and AC work.

2. IF the motor is a 28 oz. imbalance, you might swap all the old front stuff onto the 289, including the balancer. I believe the 50 oz. balancer came in '79. You don't want to mix these up - you'll get horrible vibration that will damage the motor.

Matt

Mo65 · 11-03-1999, 04:17 AM

Thanks Matt. Your suggestion works only if I give up the AC system .The 302 water pump pulley hits the bolt that holds the AC idler assemnly that is bolted to the water pump. I really wanted to to install the AC especially after what I paid for those original brackets and idlers. Will the engine really screw up if I put a 289 harmonic balancer and pulley in it. The engine is a 5.0 from a 79 Ford Fairmont. Any other sugestions?

rwhite65 · 11-04-1999, 10:14 AM

I have a 74 302 in mine. Wiht all the 289 front accesories. Including balancer. No prob with vibrations. But I do not have ac, or power steering.

------------------
Rwhite65, fastback, 302, 4.10, AOD

Mo65 · 11-05-1999, 02:55 AM

Thanks Rwhite65 for your comment. I think I am going to have to install the 289 harmonic balancer and pulley to make this thing work. I could use the 302 pullies like Matt suggested, but I won't be able to use the 65 power steering because 302 water pump pulley has only one groove. I can probably live with out the AC but not the PS unless I replace the control calve rod to a non PS. I don't really want to do that neither because that control calve rod was pretty expensive too.
I hope there are more guys out there that can share their experiences about this problem. I appreciate more words of wisdom.
Thanks.

------------------
Moises Plasencia

11-02-1999, 05:31 PM	#1
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	water pump pulley Hi, I have a 302V8 that I installed on my 65 Mustang. I've already changed the oil pan, timing cover and water pump. I left the original 302 4 hole harmonic balancer and pulley but changed water pump pulley to a 289 double grove pulley. The groves seemed to match but the size of the harmonic balancer of the 302 seems to ne to large; does not allow the water pump pulley rotate freely. For those guy out there that have adapted a 302 on a 65 Mustangs, what are my alternatives to make this thing work. The car is equiped with the original power steering and factory AC. Thanks

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11-02-1999, 11:45 PM	#2
65Matt Registered Member Join Date: Apr 1999 Location: GA Posts: 45	1. Use the 302 water pump pulley. Besides it binding, the 289 one may drive the water pump too fast or slow. I think this would give you the least amount of headaches, as long as your PS and AC work. 2. IF the motor is a 28 oz. imbalance, you might swap all the old front stuff onto the 289, including the balancer. I believe the 50 oz. balancer came in '79. You don't want to mix these up - you'll get horrible vibration that will damage the motor. Matt

11-03-1999, 04:17 AM	#3
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	Thanks Matt. Your suggestion works only if I give up the AC system .The 302 water pump pulley hits the bolt that holds the AC idler assemnly that is bolted to the water pump. I really wanted to to install the AC especially after what I paid for those original brackets and idlers. Will the engine really screw up if I put a 289 harmonic balancer and pulley in it. The engine is a 5.0 from a 79 Ford Fairmont. Any other sugestions?

11-04-1999, 10:14 AM	#4
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	I have a 74 302 in mine. Wiht all the 289 front accesories. Including balancer. No prob with vibrations. But I do not have ac, or power steering. ------------------ Rwhite65, fastback, 302, 4.10, AOD

11-05-1999, 02:55 AM	#5
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	Thanks Rwhite65 for your comment. I think I am going to have to install the 289 harmonic balancer and pulley to make this thing work. I could use the 302 pullies like Matt suggested, but I won't be able to use the 65 power steering because 302 water pump pulley has only one groove. I can probably live with out the AC but not the PS unless I replace the control calve rod to a non PS. I don't really want to do that neither because that control calve rod was pretty expensive too. I hope there are more guys out there that can share their experiences about this problem. I appreciate more words of wisdom. Thanks. ------------------ Moises Plasencia