Tensioner and idler pulley

CoolhandLW said:
Started this morning with the squeel again but it went away in a couple minutes. After work it was even worse. Didn't go away until highway speed. Replaced the tensioner pulley (pulley only as the tensioner is well within bounds). Got the squeel again. Almost sounds like it's from the alternator above the other two. Any guesses? Taking it to my father-in'law tomorrow if I can't deal with it myself.
Click to expand...
Spray the pulley with soapy water see it changes that’s how you’ll find which one is making noise
 
Don't get the one from Napa either. It has the change in dish. You can probably get a different bolts and washer and make it work, but I just returned it and bought a new Mopar one.

I also got a Mopar tensioner. The good thing about Mopar is it came with a new replacement bolt that I have heard has a tendency to strip out.

I also picked up a new alternator off of Amazon. Mopar alternator is Discontinued FYI.

IMG_20200709_144740.jpg
 
CoolhandLW said:
Started this morning with the squeel again but it went away in a couple minutes. After work it was even worse. Didn't go away until highway speed. Replaced the tensioner pulley (pulley only as the tensioner is well within bounds). Got the squeel again. Almost sounds like it's from the alternator above the other two. Any guesses? Taking it to my father-in'law tomorrow if I can't deal with it myself.
Click to expand...
i am having the same exact problem. I have replaced the tensioner pulley, belt and about to replace the idler but it will be a few days before it gets here. Did you find out your root cause? Seems like I am just a couple steps behind you on this so if you came to a solution that would help me out big time. Thanks!
 
acct21 said:
I just replaced the idler pulley on our 2005 4.0L yesterday. The Gates 38043 — listed everywhere (RockAuto, Autozone, O'Reilly's) as correct for the 2005 4.0L (among others) DOES NOT FIT. The design on these has apparently changed, and the face of the pulley is no longer a shallow dish — it has a very small opening for the bolt and washer. The OEM idler pulley has a shouldered spacer that attaches from the rear and essentially takes all of the play out of the pulley. The OEM bolt and washer fit into the shallow dish of the pulley face and cover the bearing. The Gates 38043 WILL NOT ALLOW THE OEM WASHER TO SEAT — so if you tighten the bolt, it seizes the pulley. The Gates pulley comes with a bushing that fits into the pulley face to accept the OEM bolt, but then the shoulder on the spacer pushes the pulley out and it now has back and forth play.

Long story short — do NOT use the Gates 38043 — the AC Delco with the same part number looks to be the same part.
Click to expand...

That shouldered spacer is supposed to install at the front. It prevents the bolt flange from sizing the pulley bearing once tightened. At the back there should be a cylindrical spacer.
 
Top Bottom
Back