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Author Topic: Which 3rz serpentine pulley on 87 alternator  (Read 1424 times)

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87pickup

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Which 3rz serpentine pulley on 87 alternator
« on: Feb 02, 2009, 11:44:17 AM »
I am installing a 3rz in my 87 truck and want to use the 87 alternator and harness so everything plugs right in. But the serpentine pully on my 3rz alternator rubs the housing of the 87 alternator. So my question in does anyone know which serpentine pulley will work on my 87 alternator?
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TIMS89CRAWLER

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Re: Which 3rz serpentine pulley on 87 alternator
« Reply #1 on: Feb 02, 2009, 12:12:44 PM »
no clue but it is really easy to wire the 3rz alternator.... 1 IGN 12V., 1 constant 12v, 1 ground and a wire to the battery.....
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87pickup [OP]

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Re: Which 3rz serpentine pulley on 87 alternator
« Reply #2 on: Feb 02, 2009, 06:54:05 PM »
I was jusy hoping to use the 87 alternator harness to keep everything plug in. What about cutting the plug from the 3rz alternator and soldering it to the 87 battery harness? I know the wire is alot heavier gauge on the 87 harness than on the 3rz harness. Anyone know why?
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87pickup [OP]

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Re: Which 3rz serpentine pulley on 87 alternator
« Reply #3 on: Feb 02, 2009, 07:11:18 PM »
I read on the internet that the pulleys were changed on 2001 and later models
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