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I have a pecking sound coming from front of engine. I replaced the idler pully and belts still have the pecking. The pecking stops when I take the belts off of the idler pully.
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I have an identical truck. You have 2 which includes the tensioner pulley and a stationary pulley on the other side of the front block. The tensioner can come with or without a pulley. There should be a sticker with the belt path indicated on it, usually around the radiator Just be careful to see that a few trucks did not have A/C and the belt path shows both types.
If you have a cellphone take a picture of the belt path before you take anything off.
The bearing in the pulley is a single row ball bearing so you can expect a slight side movement in the pulley. Check the drive belt for cracks. Ensure that the belt is running at the top of the pulley and not down in the groove. Lastly if there is no other obvious problems then change the drive belt
Really don't need a diagram. Loosen the slide bolts on the power steering pump. loosen or tighten the pump by turning the jack screw (long transverse bolt) under the pump. Once the belt is tightened up, lock down the slide bolts and you are finished.
Could be several things. WHICH ENGINE?.. 4 cylinder (has three belts, power steering/water pump, alternator & A/C compressor, one tensioner pully A/C compressor), The V6 2.7 (has only one belt, 1 Idler pully and 1 tensioner pully), the V6 3.5 has two belts - A/C/alternator, and power steering - there are two tensioner pullys). Noises can be caused by the belt(s) themselves, pullys, bearings, pully bearings, water pump shaft bearings (or belts/pullys rubbing up against something). Let's not forget that there is also belt(s) behind the Timing Belt cover as well as pullys and bearings associated with the timing system. You could start by removing one accy drive belt at a time (alternator, water pump, compressor, power steering, etc) to see whether or not the noise goes away in each case. If after each case, you discover the noise is still there, it's probably behind the timing belt cover (idler/tensioner pully, water pump shaft bearing, crankshaft bearing, etc.). Good Luck
It sounds like an idler pully needs replaced. The bearings are going bad. It is not hard to do this, but more than likely that is what it is. You should also replace the belt.
it is your idler pulley. get it from dealer comes with bracket, just use pulley off bracket. take your belt off and your idler pulley is lower right hand side(facing your engine). 15mm bolt, replace pulley and reinstall your belt. it;s a common problem on trailblazers
well has soon as you loosen and take out the alt the belt will become loose then put alt on it will slide down to put belt around and then pull up on alt and tighten it up
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