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FX35 Adjusting drive belt

Discussion in 'FX (03-08) - Engine & Drivetrain' started by kahlilj, Jul 10, 2018.

  1. kahlilj

    kahlilj Member

    Messages:
    32
    Likes Received:
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    Car:
    2006 FX35 AWD
    This seems simple enough, but I can't find a write up on adjusting the drivebelt or at least with pics or video. I'm a new owner of an FX35 (2006) and recently it started squealing. I'm pretty sure it's the drivebelt. So I'd like to tighten it, but am unsure of what parts I need to work on. I researched several threads on here & think i have an idea, but was surprised there was no "how to" thread. It seems there are a couple of pulleys that I need to loosen their lock nut then adjust the adjusting bolts?

    I saw this thread but the links on it no longer work:
    FX35 - belt

    Any help with pics or video on exactly how to do this?
     

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  2. onthemove

    onthemove Member

    Messages:
    490
    Likes Received:
    171
    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    The large center pulley is the crankshaft pulley. Both belts are attached to it. The much smaller black pulleys, one on either side of the crankshaft pulley, are the belt tensioner pulleys. The bolt to make adjustments is at the bottom of the bracket that each of these two pulleys are attached to. It allows the pulley to travel up and down, tightening and loosening the tension on the belt. IIRC, I believe a 10mm socket is needed for both the adjustment bolt and the pulley.
    Loosen the bolt in the center of the pulley.
    Loosen or tighten the adjustment bolt at the bottom of the pulley bracket.
    Tighten the bolt for the pulley back up once the belt is appropriately tightened.
    I cannot remember torque specs for the pulley bolt. Snug.

    engine front.JPG
     
  3. OP
    OP
    kahlilj

    kahlilj Member

    Messages:
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    Car:
    2006 FX35 AWD
    ThankS OTM! I found them. Here’s a pic from my rusty engine. IMG_0426.jpg
     
  4. onthemove

    onthemove Member

    Messages:
    490
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    171
    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    I'd spray the bolts with maybe wd40, pb blaster or an equivalent and let'em chill for awhile before wrenching on'em.
    My engine didn't look much better before I whipped it into shape.
     
  5. OP
    OP
    kahlilj

    kahlilj Member

    Messages:
    32
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    Car:
    2006 FX35 AWD
    Oh for sure I had already done that before I sent the pic. lol. Not sure if it showed in the pic or not. But it was easier than it looked to loosen the pulley bolt and the adjusting bolt too. Pulley was 14 mm. Adjusting bolts were 12 mm. I adjusted both pulleys in less than 20 mins. Squeal is gone!
    Thanks again for your help

    Now on to the next thing: Spark plug replacement. Are y’all using anything other than stock?

    Forum search here I come
     
  6. onthemove

    onthemove Member

    Messages:
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    171
    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    Platinum is stock. Not the best choice unless your looking for longevity. Coppers good and Iridium is best im not so ho.
     
  7. OP
    OP
    kahlilj

    kahlilj Member

    Messages:
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    Car:
    2006 FX35 AWD
    I’ve used iridium on my other car and prefer it. Do platinum tips last longer than iridium though?
     
  8. onthemove

    onthemove Member

    Messages:
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    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    "NGK gives them a life expectancy of 40-50k miles. But they have to temper their projections as driving conditions and motor modifications differ. Typically we have found you can expect 60,000 to 80,000 miles on an unaltered motor."
    40-50k miles is a long time for me.
     
    kahlilj likes this.
  9. rammersFX

    rammersFX Member

    Messages:
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    Location:
    Sylvan Lake, MI
    Car:
    1st gen FX still hunting
    Name:
    Ramiro
    If after replacing the belts it continues to squeak, you will need to change the tensioner and idle pulleys
     
    kahlilj likes this.
  10. OP
    OP
    kahlilj

    kahlilj Member

    Messages:
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    Car:
    2006 FX35 AWD
    I don’t have my owners manual with me, but saw this from NGK’s site. Is this the type you’re using?
    IMG_0510.jpg

    The LFR5AIX?
     
  11. onthemove

    onthemove Member

    Messages:
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    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    That looks like it but you can call any auto parts store or ngk and verify.
     
  12. OP
    OP
    kahlilj

    kahlilj Member

    Messages:
    32
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    Car:
    2006 FX35 AWD
    Will do. But I also noticed this Ruthenium plug? Never heard of that types before. Tried doing a search on the internet for comparison with Iridium plugs but not seeing much other than material comparisons. Ever heard of these before?
     
  13. onthemove

    onthemove Member

    Messages:
    490
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    171
    Location:
    the sweaty south
    Car:
    2003 FX35 AWD
    Name:
    Michael
    Nope.
     
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