The one the belt from the alternater is on.
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1999 Kia Sephia Question: how do you remove the engine idler pulley from a 1999 Kia Sephia 1.8 ltr. engine
Answer #1euromech December 14, 2011, 12:10Journeyman
There is a tensioner that you have to loose up There is a bolt on middle of pulley that you have to loose first then find the bolt that moves the pulley up and down. Then remove belt . Then you can unbolt the idler pulley I think you need 12 and 14 mm wrench and or socket with drive.