I recently installed a j&S 240 amp high output alternator in my 2017 Nissan Altima (2.5 liter)I'm having one hell of a time trying to find the right serpentine belt. The website says to get a serpentine belt that is a half an inch shorter. I've tried this route going through NAPA Auto parts and I have been unsuccessful. I went and installed a brand new OEM belt hoping that it would work, but it's not. It squeaks and squawks and there's voltage drop. If anybody has links or the exact belt that I need for an aftermarket high output alternator I would greatly appreciate it.
JimmyZ
You might want to list the vendor you purchased the alternator from. I can tell you the mechman I got says to use a shorter belt and when I did it always made noise to some degree. When I put a belt that was a better belt from somebody other than OEM in the original size it stopped squeeking and the pwoer output is good.
It can take some messing around to get the tensioner where it needs to be etc. that is something I had to play around with a bit.
It can take some messing around to get the tensioner where it needs to be etc. that is something I had to play around with a bit.
That Altima has a spring tensioner or bolt? I have seen makers like Mechman and others put undersized pulleys on by request usually. I never understood this. Is it only to get a higher idle amperage output? If so why? The alternator is only really good for re-charging your reserve capacity and if anything unless you have 4 huge alternators you are not really adding any current to the amp this way....
Anyways, it will take some shopping around to find a short belt. Best bet is to look for an older Altima belt and compare. I use to own an older 2001 Altima, I loved that car....if you know the oem length you just look for one shorter even if it is an inch or 2, depending on the tensioner style. Spring tensioners suck, I have that on my Sonata, that is why I opted for stock pulleys on my alternator for it and my Montero but my Montero is a bit more customizably friendly.
Anyways, it will take some shopping around to find a short belt. Best bet is to look for an older Altima belt and compare. I use to own an older 2001 Altima, I loved that car....if you know the oem length you just look for one shorter even if it is an inch or 2, depending on the tensioner style. Spring tensioners suck, I have that on my Sonata, that is why I opted for stock pulleys on my alternator for it and my Montero but my Montero is a bit more customizably friendly.
I researched this before I bought my dc engineering ho alt. I had to make sure the pully was same size because undersized pullies can sometimes foul up the ecu. DC engineering alt has same size pully, and stock belt length.
Stop over working your brains and just take a brushless motor with alternator between magnetizing and mechanical energy Unlimited energy externally belt driven not attached to the vehicle. Use a step down converter if you absolutely need to but I mean why do y’all spend so much money on one that you can’t take with you to your next vehicle know what I mean 😉
It’s simple. Most belt numbers are in mm or inches. Here’s one for yours oem…. 56.2” Continental Belt 4060562F
Here’s Continental Belt 4060555. It’s 55.5”
.7” shorter. I would try that and get another anything inbetween. Look at other brands.
This is my car For example of part number in mm Some like bando 6pk1095 is in mm. It’s 1095mm long or 43.11 inch
I also run a js alternator. 370amp. So I had to figure this all out.
Here’s Continental Belt 4060555. It’s 55.5”
.7” shorter. I would try that and get another anything inbetween. Look at other brands.
This is my car For example of part number in mm Some like bando 6pk1095 is in mm. It’s 1095mm long or 43.11 inch
I also run a js alternator. 370amp. So I had to figure this all out.
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