question on 70 fan belt layout. - Pontiac GTO Forum
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post #1 of 5 (permalink) Old 03-23-2019, 04:32 PM Thread Starter
 
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question on 70 fan belt layout.

Guys I’m trying to get the alt, ps, AC brackets/belts sorted out on my 400 build. Is there a good schematic somewhere that shows the factory belt layout? Do the alt and ps belts both go over the water pump pulley? My water pump pulley doesn’t line up with both the alt and ps pump. The pulley is almost exactly one groove too forward, like the water pump snout is 1/2-3/4” too long. It’s a PRW high flow piece. See attached pics. Can anyone help me with this?

Mike
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post #2 of 5 (permalink) Old 03-23-2019, 07:39 PM
 
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you need a 9799128 water pump pulley

that one looks like a 9796060 for the 68 and 69 4" pump

and you swapped to a 4.5" pump .....

whats the water pump pulley number

looks like a 9786901 power steering pump pulley

Scott
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post #3 of 5 (permalink) Old 03-23-2019, 09:54 PM Thread Starter
 
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Thanks Scott. Your correct on the ps pump number. The number on the wp pulley is 9796062. Thanks so much for the info. Extremely helpful. I’ve akready ordered the wp pulley you recommended.

Mike
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post #4 of 5 (permalink) Old 03-23-2019, 10:13 PM
 
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Hey great !!
yes 6062 for ac I brain farted .......

glad I got the 9128 w ac correct and not said 9127

I think you will be lookin goooooooooood !!

do you have your old 4" 11 bolt water pump core still?
is it a gm one ? with part number and cast impeller ??

your 6062 pulley would probably find a home also
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post #5 of 5 (permalink) Old 03-24-2019, 10:29 AM Thread Starter
 
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Yes I do. It's still on the old engine. I bought a fresh core so the car wouldn't be laid up for an extended time as I built the engine. Gonna focus on getting it running and then decide if I'm going to put any of the other stuff up for sale. Thanks again for the help.

Mike
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

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