Serpentine set up. Gen 1 SB

Discussion in 'High Tech Retrofits' started by 8pack, Jun 12, 2014.

  1. ChevyReb

    ChevyReb Veteran Member Lifetime Gold Member

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    Bonzo is that a length of all thread out of the hole under the compressor? I was looking a that last night. I am thinking of haveing my guy mill down the AC delete pulley and replace the ribbed pulley on it with a replacement tensioner smooth pulley like it looks like you did where the smog pump went.

    Did you put a nut on the inside to tighten it up against the head or just put a nut on the front of the bracket and that pulls the top smog replacenet pulley and the serpentine bracket tight to the head?

    I have looked for a larger diameter pulley with raised lips on the front and back but so far no luck!
     
  2. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    yes that is threaded rod but it does not appear I used it.

    My a/p delete is smooth, that is a GM part. I'd have to look for the part number

    today:
    [​IMG]

    mock up:
    [​IMG]

    these are gm with grooved pulleys.
    [​IMG]
     
  3. ChevyReb

    ChevyReb Veteran Member Lifetime Gold Member

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    Darn, now you have me back to guessing how to bolt this thing in again. :screwup:

    Is the 10186167 pulley smooth where the belt rides?
     
  4. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    don't think so. check the part numbers in the setup GMPP sells.
     
  5. ChevyReb

    ChevyReb Veteran Member Lifetime Gold Member

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    So you run your flat side of the belt on the ribbed pulley under the AC compressor???
     
  6. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    just like the pic above, flat against flat, ribbed against ribbed. the AIR delete pulley just puts some tension on the belt to avoid flapping at high RPM. some 3rd gen guys say just get a shorter belt but IMO that is not the way to fly.
     
  7. 8pack

    8pack Veteran Member Lifetime Gold Member

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    ChevyReb, I am trying to figure out what you are asking. I just installed the set up. It is exactly as Bonzo has it.

    The Air pump delete is a bracket that bolts in where the Air pump went and has a smooth pulley mounted to it. The back of the belt runs on the smooth part of the pulley.

    My kit came with that smooth pulley.

    I think this is what you are looking for?

    http://www.summitracing.com/parts/nal-10129569

    I had to grind the ends on mine a bit to get it to fit. If you read the reviews it sounds like I am not the only one.
     
    Last edited: Sep 5, 2014
  8. junkyardZ28find

    junkyardZ28find Veteran Member

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    There are two types of RH serpentine brackets-the truck versions usually don't have the smog provision and are a cleaner look. And, there are actually at least three versions of the LH bracket too-I've got 2 which allow for a 140A alternator with NO mods required-very hard ones to find and they aren't part of any GM kit but they were on Caddy's for 2 years only. Its funny GM offers only one replacement kit even though there were many varieties of it.
     
  9. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    that is probably the one I have.

    I love the reviews.
    Dear idiots, you used the wrong belt and put it on wrong. Nice HP gain lol
     
    Last edited: Sep 5, 2014
  10. ChevyReb

    ChevyReb Veteran Member Lifetime Gold Member

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    I thought I would add this question in this thread since it is directly related. When retrofitting the serpentine system over to the older engine, how to you determine how to chose the proper belt length? There are register marks on top of the tensioner, but where is the sweet spot it needs to be for proper tension to be applied?

    In this pick there is now load on the spring, it is in its home position with no belt on it. I need to find out where the marks should line up so I can measure the length while holding preasure to align the marks where they should be.

    [​IMG]
     
    Last edited: Sep 14, 2014

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