My Odyssey threw a belt and the new one doesn't fit - The unofficial Honda Forum and Discussion Board Forums For Honda automobile and motorcycle enthusiasts.

Odyssey Forum This minivan is among the class leaders thanks to its roomy interior and powerful engine offerings.

My Odyssey threw a belt and the new one doesn't fit

Reply

 
 
 
  #1  
Old 02-15-2018, 09:52 PM
Junior Member
Thread Starter
Join Date: Feb 2018
Posts: 2
Default My Odyssey threw a belt and the new one doesn't fit

My 2002 Honda Odyssey's alternator/serpentine belt started making a whirring noise and then got thrown. It's mostly intact except one of the ribs has been stripped off. Not knowing why it would come off, I wiggled the tensioner a bit. It had a couple of millimeters of play so I figured it needed replaced. The new one has the same play and I was able to put the new belt on easily without even having to pull back the tensioner. I called O'Reilly's and verified the part number but I compared it to my old belt and it was a little bigger. I put the old belt (or what's left of it) on the pulleys and it was still way loose. I checked the alternator and a/c pulleys. Everything SEEMS good. Nothing wiggles and the pulleys spin.

Yes, I double checked the belt diagram. I've got it like this: (Not the same year but same diagram as far as I can tell)



My working theory is that the harmonic balancer (AKA crankshaft pulley) is worn down to the point that it is too small to hold the belt on. Here's a photo of that pulley. It measures at just under 6 inches in diameter. I've already spent $90 that I may or may not have needed to spend on this project. I'd rather not spend another $80 for nothing. Does this seem like the likely culprit? What else could it be?

Harmonic balancer (AKA Crankshaft pulley)
 
Reply With Quote
  #2  
Old 02-16-2018, 01:36 AM
Super Moderator
Join Date: Mar 2006
Location: Hemet Ca.
Posts: 4,184
Default

welcome to the forum. In your writings, seems you have the old belt with the new tensioner, have you already tried using the old tensioner back to original just to check for looseness.
 
Reply With Quote
  #3  
Old 02-16-2018, 03:05 AM
Junior Member
Thread Starter
Join Date: Feb 2018
Posts: 2
Default

Originally Posted by acmech52 View Post
welcome to the forum. In your writings, seems you have the old belt with the new tensioner, have you already tried using the old tensioner back to original just to check for looseness.
I haven't tried that. They appear to be the same size but I'll double check.
 
Reply With Quote
  #4  
Old 04-15-2018, 05:54 PM
Junior Member
Join Date: Apr 2018
Posts: 1
Default

If you havenít already figured it out, or if someone else happens to land here trying to figure out why itís still loose like I was, itís the upper alternator stay bracket that bolts to the the head and the alternator. Itís broken, and itís hard to see from the top. It costs about $40 from Honda, $15-25 on eBay, or if you happen to have a pick and pull salvage yard nearby you can get it for about $5-10.

I looked for for three days trying to see who had a similar problem, found this thread and still had no good answers. The alternator seem ok from above but when I pushed up from the bottom it moved up, Knowing it was supposed to be stationary led me to finally find the bracket broken in Two pieces
 
Reply With Quote
  #5  
Old 06-18-2018, 04:58 PM
Junior Member
Join Date: May 2018
Posts: 16
Default Alternator mounting bracket

Try to weld if all possible. That happens on my 2003 H-Pilot n it works.
 
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ed Morales
Honda Accord Forum
1
02-24-2012 11:18 AM
misterix
Honda Accord Forum
2
07-11-2009 06:29 AM
hotpeds
Honda Civic Forum
2
05-03-2009 11:00 PM
VTECwarrior
General Honda Talk
1
04-11-2009 01:56 AM
civic2017
Honda Forum Help & Suggestion Center
3
08-29-2008 12:36 PM


Thread Tools
Search this Thread
Quick Reply: My Odyssey threw a belt and the new one doesn't fit


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.