I have changed the belts and pulleys on my 96 Ford Explorer due to what sounds like belt noises to no avail.
I am told that the injector synchronizer is bad and that is what is causing the noises I am hearing.
I have never heard of this before. The parts to fix this are expensive.
Could this really be my problem?
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change the idler pulley . its held on by a bolt in the center of the pulley. the bearings are sealed so you can't grease them. but first you have to take the tension off the serpintine belt. that is also another pulley located below the idler.don't know what size bolt on a ford but use a long wrench grab the bolt on the tensioner push to the right like you were tightening it. that will release the tension on the belt. don't take the belt all the way off just off the idler pulley. change the pulley and do tha same to reinstall the serpintine belt. if the belt comes all thr way off under the hood or on the front around the top of the radiator there will be a schematic that shows you how the belt should go around everything. let me know what happens. sometimes the tensioner pulley will grind also so be sure your changing the right pulley
if the pulley has play then replace it. guarinteed. the play is allowing the belt to pull on the belt in such a way that its allowing the belt to pull foreward on it instead of into it and is causing damage. once you replace it then check every single turn point that belt does to see if its dead straight. not close enough, dead precision straight. if you put something straight like a square steel rod on the fronts of each pulley and check that over the gap that the rod pretty much touches both sides of each pully face. that will guarintee you that those pulleys are in line. if you put the rod on one pulley and the other pulley is 20mm or 3/4 of an inch out then the pulley thats out needs to be re aligned. your best true solution to this issue is fix the pulley problem then trade it in. you are going to have a lot of issues with it within the next 50 thousand now that the engines taken a whack and the transmission is out of line.
Check the belt tensioner and the idle pulley... (looks just like the pulley on the tensioner, but bolts straight in.).. - from experience...my single pulley was bad... after replacing the tensioner TWICE... (duhh!!)
Sounds like you have a pulley locked up. Did the belt break? If not, it could have just flowed over the locked pulley without breaking. Take the belt off and spin check all the pulley's. You will find it. Was you running the air compressor?
Pretty simple fix... just did mine today. Before you start, do 2 things. 1. Remove the negative battery terminal for safety. 2. Make sure that you have a diagram available for the proper belt routing for your engine. If not, draw it up on a piece of paper.
Use a wrench or rachet / socket to rotate the tensioner pulley clockwise until you can slip the old belt off. Snake the old belt around the fan and discard it.
Check all pulleys for embedded gunk and clean as necessary. While not absolutely necessary, I recommend changing both the idler and tensioner pulleys- especially if you're changing the belt due to chirping or sqeaking. Autozone has the belt, tensioner pulley assembly and idler pulley for ~$110.
If changing the pulleys, just remove the single bolt that retains each pulley and replace the old ones w/ new.
Reverse the procedure for belt removal when installing the new one. Be very mindful of the routing and make sure that the belt is seated completely in the correct grooves of each pulley.
Put the negative battery cable back on and bump the starter a few times to be sure that the belt is tracking properly. Start it up and take pride in a job well done. Took me approximately 1 hour including pulley cleaning.
Good luck- by the way, my local Ford dealer wanted $360 to do this job.
There are a few things i would look at, the common problems are the exhaust system may have a rattle clamp or the rings on the exhaust flex pipe, the next is the fan belt area, the ac compressor or a pulley may be worn and loose i would start with these things first, good luck.
On the Inside of the Engine Compartment you will find the Routing Sticker for the Belt to Reinstall. Locate the Tensioner (Will look like a Pulley that has one Round Pulley Under the Belt and One larger Round Pulley Mounted Above that. In the Middle of the Large Pulley there is a Bolt. Get a Wratchet and Turn it. It will Lower the Pulley under the Belt and Loosen the Tension Off of the Belt. Remove the Belt. Follow the Diagram Under Hood to Reinstall.