adjustable timing belt idler pullys?
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This is a discussion on adjustable timing belt idler pullys? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; ok i adverted a fraged motor by luck. replaced my timing belt and all the pullys, tentioner. i didnt realize ...

  1. #1
    Registered User tirerob's Avatar
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    adjustable timing belt idler pullys?

    ok i adverted a fraged motor by luck. replaced my timing belt and all the pullys, tentioner. i didnt realize how much a little belt slop could make a motor run so funky. now it is so smooth id almost say that kit was a performance upgrade! gates builds gewd stuff after all. while i was looking up parts i found adjustable idlers. is this a timing fine tuning trick? i am quite sure that after my first timing belt i dont want any more adjustments and am not building any crazy power levels but definitly curious what theyre used for.Click image for larger version. 

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ID:	111774 whats left of mine. still dont know how i didnt wreck something else, glad i didnt tho

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    Good news, everyone! xxxxxxxAnub1s's Avatar
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    From who? There is no reason to have an adjustable idler. The tensioner is self adjusting, but that's the only thing that should move in that system.
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    Moderator Donkey's Avatar
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    adjustable timing belt idler pullys?

    Those are tensioners


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    Registered User tirerob's Avatar
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    Sorry guys that wasn't a great pic to reference from. The one that got my attention had them mounted in the top left and right idler position. As for make I'm not sure, the center of the bearing was red and had a large chrome bolt obviously offset from center on both pulleys. Just a random engine out pic maybe. I'll look again and see if I can't find it.

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    Moderator Donkey's Avatar
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    Quote Originally Posted by tirerob View Post
    Sorry guys that wasn't a great pic to reference from. The one that got my attention had them mounted in the top left and right idler position. As for make I'm not sure, the center of the bearing was red and had a large chrome bolt obviously offset from center on both pulleys. Just a random engine out pic maybe. I'll look again and see if I can't find it.
    There is no need to find it. Those are not adjustable idlers. Those are timing belt tensioners. My wifes old Honda used on just like that. No USDM WRX/STI or any 98 Subaru and later would use something of that nature. Some of the older Subaru 1.8L and 2.2's used those.
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    Registered User tirerob's Avatar
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    Cool! Thanks Donkey! I'm still getting used to how smooth my motor spools now with new timing rollers. Its wild. Must be how a wrx is supposed to run, without sloppy timing lol.

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    GDR
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    Quote Originally Posted by tirerob View Post
    Sorry guys that wasn't a great pic to reference from. The one that got my attention had them mounted in the top left and right idler position. As for make I'm not sure, the center of the bearing was red and had a large chrome bolt obviously offset from center on both pulleys. Just a random engine out pic maybe. I'll look again and see if I can't find it.
    Thats Crawford Performance.
    Crawford Performance

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    Moderator Donkey's Avatar
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    Quote Originally Posted by GDR View Post
    Thats Crawford Performance.
    Crawford Performance
    Interesting. Never seen those before. Most just use adjustable cam gears to dial in cam timing.
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