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vacuum hose routing diagram 1966 grand prix

hundayguy

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Hello members, I am a proud new owner of a 1966 Pontiac grand prix. 4 barrel carb with a/c and p/s. I am looking for a vacuum hose diagram for this vehicle.
I have searched the web with no luck. Any thoughts?

thanks....Hundayguy.
 

melsg5

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You need a copy of the 1966 factory Service Manual for the complete diagram. You have nothing currently connected?
 

hundayguy

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correct. engine was disassembled for reconditioning and im stuck trying to figure out this puzzle.

there are 2 vacuum sources coming from intake manifold. one is on the lower runner and one on the upper runner. both appear to be connected to a plastic 3 way tee and other nipple of the 3 way goes to pcv valve. strange to think they have 2 vacuum sources for pcv system.
 

melsg5

Staff member
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this image shows the same hook up you describe and it appears to be an early attempt of evenly distributing crankcase gases among all the cylinders.
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hundayguy

New member
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thank you sir for the information. I went ahead and took your advice and ordered myself a service manual. I am not very familiar with the Pontiac product but am learning so much about this project I inherited. the service manual will be handy.

thank again
 
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