Hi,i am nazmi from malaysia,i'm driving the jeep cherokee 2.5 sport,my problem is when i'm driving my jeep,the timing belt was loose and the pulley also get loose,then the 'GEN' light is turn on,i've change my timing belt for twice in a month.the 1st timing belt was totally damage.
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Re: timing belt and pulley
1.Your engine has an internal timing chain, not a belt. Therefore I'm going to assume that you mean the serpentine drive belt. Common causes for belt to fail is either a mis-aligned or damaged pulley, improper belt tension, or bad tensioner spring (if equipped with spring loaded tensioner) You mentioned a loose pulley but didn't say which one! That's what I'd look at first! Also, make sure that all pulleys have no "wobble" indicating a bad pulley bearing Most common: water pump or idler pulley.
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the power steering pump has a seperate adjuster bolt ont the bottom left of the pump if you loosen this off then loosen the pulley bolt it iwill move in to allow for the belt then tighten the adjuster bolt till the tension on the belt only allows for a 1/2 inch movement up or down then tighten pulley bolt
not the pump may be stiff to move at first
To replace belt, first loosen the pivot and slide bolt on the steering pump, then use the jack bolt below the pump to move it. Belt goes (ccw) around outside of ps pump, under idler pulley, over a/c compressorover alternator over fan pulley, over crank pulley over water pump and back to the ps pump. best bottom (grooved area) should match with any pulley with grooves, back of belt should contact smooth pulleys. 9example...grooved part contacts ps pulley, smooth back goes under idler pulley) When finished the water pump should spin ccw (I've seen them put on incorrectly so it turns backwards) Tighten jack bolt till the long strech of belt is giving about 1" deflection, then lock pivot and slide bolts down.
May be a weak tensioner that needs replacing. Make sure you clean pulleys well with brake cleaner or similar as well. I have had one with similar problem, that Gator back belt was causing it. I'm not 100% convinced that a notched belt will get as good a grip as a complete rib all the way around the belt. Just doesn't add up to me. If you compare that to tire grip, then you'd be telling me that snow tires would work better on the Nascar circuit?