AC Belt Tensioner - Kia Forum
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#1 (permalink) Old 06-10-2011, 10:51 AM
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Default AC Belt Tensioner

Trying to replace ac belt with new one but the tensioner pulley will not tighten up while turning the adjuster bolt that pulls the pulley it will start to tighten then turn loose. What can I do for this?

1999 Kia Sportage
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#2 (permalink) Old 06-10-2011, 07:01 PM
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If you did not loosen the center bolt on the (slack) idler pulley, try that first to relieve tension of the pulley to the adjustment arm. Loosen so the pulley is free, then re-tighten so the pulley is just hand-tight against the adjustment arm.

When tension in belt is correct, tighten to 23-25 ft·lb(31-34N·m), per the Kia website.

If the idler pulley is loose/free and the tension adjustment bolt still does not thread (tighten), you will need to remove, inspect, and possibly purchase a new assembly.
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#3 (permalink) Old 06-11-2011, 08:48 PM
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It's kind of a poor design. Loosen the bolt in the center of the idler pulley. It's attached to a block of metal that acts as a slider and has threads for the adjusting bolt. Now using the adjusting bolt on the bottom adjust the belt to the correct tension. Once you've got the correct belt tension tighten the bolt in the center of the pulley and recheck belt tension. This will lock the slide. Now don't forget to snug up the adjuster bolt or it could work it's way out from engine vibrations and fall out while driving. Be care not to over-tighten the A/C belt as this put excessive force on the bearing and clutch.
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#4 (permalink) Old 08-27-2011, 10:49 AM
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Thanks I got it
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