MDX - Belt rubbing, help! Only car

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Old 07-14-2018, 03:22 PM
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Exclamation MDX - Belt rubbing, help! Only car

Hello guys,

My MDX was making whining noise from belt/pulley for 3-4 months now but only on cold start and for 3-4 seconds. I was driving it one day and i heard the belt make an odd noise so I shut the car off and towed it to the house. Belt was still on and didnt snap but moved along the tensioner a bit.
I put the new belt on without replacing the tensioner beforehand, but the belt is rubbing where right between both pulleys on the tensioner(see picture). My question is, does it look like I need a new tensioner assembly?

Purchased:
New belt
Tensioner pulley whole assembly.


The old tensioner doesn't wobble or make noise when physically turning it.
Before I open the package and cant return the pulley assembly, I just want to clarify if you guys think that the tensioner assembly is my issue.


Thank you AZ!

Old 07-14-2018, 03:49 PM
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are you sure the belt is routed properly?
Old 07-14-2018, 03:51 PM
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Almost positive. It really wouldnt go on any other way.


T his
Old 07-14-2018, 04:05 PM
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how was the tension when you installed the new belt? its just a spring mechanism so you would prob know if it was bad. there is actually an arrow on the body which lines up with a dash mark. it ought to be aligned, if not the tensioner is bad, check your new one for the marks im talking about. did all the other pulleys turn smooth? any damage to the underside of the old belt? are you sure the ribs are seated in the grooves on all pulleys? are you sure its the correct belt?
Old 07-14-2018, 04:10 PM
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Appreciate your quick replies bud.

The belt feels looser than I would expect with the old tensioner. I'll check those marks out and get back to you on that.
The old belt had wear on the sides but nothing major, probably from when rubbing against the side of the tensioner or from the cold starts. It was replaced 40k miles ago.

The groves do all fit well on the alternator, ps, and AC. My only initial concern was the crankshaft pulley looks like it had rubber on the outer end but i think thats manufacture spec to avoid the belt slipping off.


let me check those lines.
Old 07-14-2018, 05:12 PM
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You might make a point on the wrong belt sir...


My part # is 56922-RV0-A05

I just called acura again and they said I need 38920-RCA-A03 / 56992-R70-A01

Parts is now closed and they cant help me til Monday. Lame...
Old 07-14-2018, 05:25 PM
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Called Acura of Peoria since mine are now closed and they confirmed that I do infact have the correct drive belt #56922 rv0 a05
Old 07-14-2018, 05:40 PM
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so the belt is correct then? i guess to confirm you could stack the new on the old to check diameter. does the belt track all look squared up? nothing out of alignment? id turn it over by hand a few times to make sure all those pulleys are seated properly. what do you mean when you say the belt moved along the tensioner a bit? and did the car have any strange behavior after the sound? any strange smell?
Old 07-14-2018, 05:44 PM
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Like the belt should in theory sit in the very middle of the tensioner and idler pulley, but when I first turned my car off to tow, it was slightly coming off, maybe little less than 1/4th of it was hanging over the pulley itself.
The noise it made sounded like the belt touching itself, or touching against the metal of the pulley because it had wiggle room
At the point in time, im thinking it is the tensioner assembly I purchased, but like I said, am trying to avoid opening if possible.
Old 07-14-2018, 05:56 PM
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it can only be a few things, im guessing tensioner, check out those marks, it almost looks like from your pic the belt was rubbing on the body of the tensioner, hard to tell.
Old 07-14-2018, 05:59 PM
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I was trying to find those lines, even on the new one, but not sure which ones youre referring to unfortunately

i went ahead and removed the old tensioner assembly

Old 07-14-2018, 06:50 PM
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These are from the tl but I’m sure it’s similar


This


You could also try this
Old 07-14-2018, 08:45 PM
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I installed the new tensioner because I was confident it was the issue, I was wrong.

The belt still touches at the same location, between the tensioner and idler pulley. see pictures for where the belt meets inbetween the two pulleys

Old 07-14-2018, 10:36 PM
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im showing your belt as the wrong part number. you need either

38920-RCA-A03 or 56992-RV0-A03

theres really nothing else it could be. id pick the first one, as it fits the TL also (same part number) and im almost certain the belts are identical across these two platforms. not sure why the other pn is even listed
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Old 07-14-2018, 10:40 PM
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I bet if you compare the new belt to old it’s longer. Allowing the tensioner to lay in a position it was never meant to, and causing the contact.
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Old 07-14-2018, 10:40 PM
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Originally Posted by 97'CL2.2
im showing your belt as the wrong part number. you need either

38920-RCA-A03 or 56992-RV0-A03

theres really nothing else it could be. id pick the first one, as it fits the TL also (same part number) and im almost certain the belts are identical across these two platforms. not sure why the other pn is even listed
Interesting. Thank you sir, I'll give it a try on Monday. I think my tensioner or pulley were still failing so hopefully no more noises on cold start. Will update on Monday.

Annoying how Acura themselves would give me the wrong part and then when I called Acura of Peroia - they stated the same PN.. very odd...but on some sites it does not show compatiable with 07 mdx, and some it does.

Old 07-14-2018, 11:13 PM
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I’ve run into the same issue with them...it happens more than it should. Now I have trust issues lol
Old 07-16-2018, 04:31 PM
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went there today to buy the correct belt, theyre saying that this belt I purchased supercedes the only PN#


So now Im at a loss of what it could be.
New tensioner, new belt, still rubbing between where tensioner and idler are. The belt was fitted multiple times and 100% on all the grooves.

Not sure what else it could be
Old 07-17-2018, 10:27 AM
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have you compared the diameter of your new belt to the one that came off there? that will tell you if they know what they are talking about or not..ive delt with many parts guys at honda...i never fully trust them. i am almost 100% its your belt. if it were me id just order the part number i referenced above, compare the belts and report back pls.
Old 07-17-2018, 10:34 AM
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Originally Posted by 97'CL2.2
have you compared the diameter of your new belt to the one that came off there? that will tell you if they know what they are talking about or not..ive delt with many parts guys at honda...i never fully trust them. i am almost 100% its your belt. if it were me id just order the part numberi referenced above, compare the belts and report back pls.

I did a quick comparison and from the eye they're identical, will check again and confirm.
I just called another Honda dealership and they confirmed the old part # 38920 rca a03 was replaced with what I received.
Old 07-17-2018, 03:18 PM
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The part you listed (56922 rv0 a05) isn’t even a valid Honda part, was it a typo? If I were u I’d be ordering a tl belt, oemacuraparts has them, and it’s not showing it was superseded by anything, and it’s the pn listed for every V6 Honda makes. Good luck.

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Old 07-17-2018, 03:22 PM
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You opened another thread in 3G land..

That belt you got is the power steering belt, not the drive belt..
Old 07-17-2018, 05:14 PM
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Thoiboi - You confused me. There are only two belts, 1. timing belt, 2. serpentine, ps, drive belt - whatever you want to call it. The belt that hooks to all the pulleys lol.

What I purchased from Acura (56992 RV0 A05) (They acknowledge the old part numbers, but local Honda and Acura say that my part I purchased should 100% work... but it does not due to being thicker)
The belts diameter isn't the issue, its the thickness. I will be ordering (38920-RCA-A03) from online, but locally at Honda and Acura - they only carry (56992 RV0 A05) in stock..


What a pain in the ass...
Old 07-17-2018, 05:32 PM
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Called Acura of Peroia again to double check for the 10th time..

38920 rca a03
56992 rv0 a01
56992 rv0 a03

Are all the old belt part #s and are now superceded by 56992 rv0 a05 (what acura gave me)
Old 07-18-2018, 08:18 AM
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If that pn replaces the A03 pn then why is it nowhere to be found on the tl parts list? That belt is still listed as an A03 belt with no mention of the new pn. Also the “new” pn belt has no info under applications while the A03 belt has a laundry list. I still think Honda is too proud to admit they gave you the wrong belt, some of those parts guys are a real pain.

I had main bearings that came in scratched to fuck and the parts dept at the local dealer said “no those are fine” I haven’t been back.

moral of the story, but the A03 belt and chalk this one up
Old 07-18-2018, 08:59 AM
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lol..

l
Old 07-18-2018, 09:43 AM
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I believe ppl are telling you it’s an updated pn...I don’t believe they know what they are doing, please just buy the other belt and report back.
Old 07-18-2018, 09:46 AM
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Originally Posted by 97'CL2.2
I believe ppl are telling you it’s an updated pn...I don’t believe they know what they are doing, please just buy the other belt and report back.
You guys are telling me to buy either one of these....

38920-RCA-A03 or 56992-RV0-A03..

But anywhere I inquire to buy said belt aka Delray/Perioa/Any local dealership - they all say the same thing... the part was updated to the belt I already have.
Im not understanding what your trying to get at.. besides finding another place to buy it that has the old PN# in stock like eBay.


Old 07-18-2018, 10:44 AM
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either that or try to buy OEM supplier parts like Rock Auto, If I recall correctly the supplier is Mitshuboshi (not Mitsubishi)
Old 07-18-2018, 10:50 AM
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Ordered old part 38920 from eBay for $25.
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