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Old 02-09-2006, 07:08 PM   #1
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Serpentine Q

Hey guys, I just got a serpentine system from a 1991 siverado. My question is, what do I do about the spot where the smog pump was. Can I run it W/O it just like it is, or do I need a delete pulley for that spot?
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Old 02-09-2006, 07:54 PM   #2
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Re: Serpentine Q

I have a 92 Camaro serpentine setup on my 350. I had to get a smog pump delete pully to make everything work, they also have a A/C delete pully. The GM part number for the smog elimination pully is (10186167) and was about $48.00 from GM parts direct on the internet. I am almost sure that your truck serpentine setup is a little different than my Camaro one, so im not sure if that part number will work for your application. But im sure they make one. Give them a ring. Hope this helps.
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Old 02-09-2006, 09:49 PM   #3
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Re: Serpentine Q

Take a piece of rope, cloth tape, whatever, route it the path of the belt, see if it works. Useful for determining belt length too. -Chris
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Old 02-09-2006, 11:01 PM   #4
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Re: Serpentine Q

you should be able to get a belt for the donor truck, I believe that year came with or without the smog pump, try calling your local auto parts store.
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Old 02-10-2006, 07:44 AM   #5
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Re: Serpentine Q

Remove the smog pump and leave the bracket there. Then buy a belt for a truck without smog pump. The new belt will bypass the smog pump location, going from the A/C compressor to the crank pulley. Lots of late 80's GM trucks came factory equipped with an empty AIR pump bracket and a belt running straight down across there.
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Old 02-10-2006, 09:34 AM   #6
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Re: Serpentine Q

Excellent to hear. Thank you TX.
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Old 02-10-2006, 10:52 AM   #7
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Re: Serpentine Q

Here is a picture of the serp. setup from my 1990 K1500 without air pump. Note the idler pulley where the air pump would have been.

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