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Serpentine Belt

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by phoenix_MR2, Aug 14, 2009.

  1. phoenix_MR2

    phoenix_MR2 New Member

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    I am about to replace a water pump on an 04 prius for a friend and I figured I would replace the serpentine belt while I am at it. I found these instructions here on the board and wanted some clarification......

    How do I apply 22lb of force on the belt midway? I have a torque wrench and can easily do the tension pulley but how do I figure out .4 inches of deflection on the belt before tightening the pulley?
     
    Silver Pine Mica likes this.
  2. fuzzy1

    fuzzy1 Senior Member

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    Would this need one of those spring tension scales, similar to a hanging scale used to weigh large fish?

    Those figures also look like round metric numbers. 22 pounds = 10 kilograms (or more properly, about 100 newtons, as kilograms are not force). 0.4" = 1 cm.
     
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

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    It's not necessary to be really precise with this. Use your thumb and apply pressure on the belt, as much as you think a 22 lb weight would produce.
     
  4. hobbit

    hobbit Senior Member

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    You don't need to take off all the engine cover stuff. Pull
    the intake snorkel and disconnect the black/white ground wire
    to get a little more working room, but you can do all the rest
    from the top. My *original* belt was still looking fine at 110K
    but I changed it to the new one I'd had kicking around for a
    long time and now the old one is a spare, I guess.
    .
    _H*
     
  5. DSNYDES

    DSNYDES New Member

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    Does this method also work for an 05? I talked briefly to a mechanic friend of mine and he said that there is a big difference between the 04s and the 05s.

    thanks,
    new to the forum
     
  6. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Model years 2004 to 2009 have the same drivetrain and use the same procedures for service.

    Even if you had a Classic (2001 - 2003) the procedure to replace the serpentine belt is essentially the same but the belt is longer because it has to spin the air conditioner compressor pulley.
     
  7. DSNYDES

    DSNYDES New Member

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    cool, thanks! I'll let you all know how it goes.