I bought a 2000 sportage that the timing belt broke and had set there for awhile. I installed a new timing belt and pulleys.The compression on each cyl was 140 psi.It makig a noise and running rought at idle and runs fine at higher rpm.
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Try this. Is could be because the old belt was slipping and has polished the pulleys or "glazed" them. So before
you replace that noisy belt scrub all of the pulleys well with a scotch
brite pad, or a good wire brush to remove the glaze and rough up the
surface. Clean them off with brake cleaner afterward. Belts work by
friction so if the surface is polished too much the belt will slip, Or try adjusting the belt TENSION will correct the problem. If this does not correct the problem you can try removing the belt altogether, and "reversing" it, and then reinstalling and properly adjusting the tension. Hope This helps.
Although a KIA manual will state that this is an interference engine, it is not. I know because I have replaced a shredded timing belt on my used 2000 Sportage to take it home and it ran great. Just recently, the timing idler pulley bolt broke while I was driving causing the belt to come off. I replaced the tensioner pulley and drilled out and re-tapped the idler bolt hole and installed the new idler and the belt (it was only 2 months old at the time) and it runs great again. THESE ARE NOT INTERFERENCE ENGINES!!!! you don't have to tear down the top end of the engine to inspect for any damage and it is very simple to install a timing belt on this motor as long as it is done properly.