Alright, serious tech question here for you guys.

I just replaced the JRSC belt and alternator belt in the caR about 30 mins ago and I need to get an idea as to how much tension I need on the alternator belt.

The service manual says 5-6mm of play on the top side (which is what I set it at) but the manual doesn't include a JRSC.

I've also got the JRSC belt pretty f'in tight right now, but I know it's going to stretch.

Tips? Thoughts? Comments?



Thanks you buncha jerks.

 

Hmmmm. If you go too tight your going to snap it. Where's Brad....

 

Standard deflection is fine on the alt. belt, it's not known to slip. The jrsc belt is the one that can slip, so it needs to be a bit tighter, but don't tighten the snot out of it. Too much tension on the jrsc belt can wear out the nose cone bearing. Remember to re-check tension after a few hours driving.

 

If you can twist the belt 90 deg. its close enough.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Batoutahell &raquo;</TD></TR><TR><TD CLASS="quote">Remember to re-check tension after a few hours driving.</TD></TR></TABLE>

...because the belt will expand slightly due to friction through the pulleys and internal engine bay tempuratures.

 

Right on, thanks guys.

I'll double check the belt when I get home tonight.

 

So I just took a look at the alternator belt and it looks like it's starting to walk off of the alternator pulley.

What's causing that? Everything seemed in order when I put it all back together, so I have no idea what would cause that to occur.

 

Are all the bolts holding the alternator tightened down properly? It would only do that if a pulley was not alligned properly. That would be my first guess.

Second guess is that you don't have the belt on the proper crank pulley groove.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Haleiwa-Brando &raquo;</TD></TR><TR><TD CLASS="quote">Are all the bolts holding the alternator tightened down properly? It would only do that if a pulley was not alligned properly. That would be my first guess.
</TD></TR></TABLE>

I'll double check them and make sure.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Haleiwa-Brando &raquo;</TD></TR><TR><TD CLASS="quote">Second guess is that you don't have the belt on the proper crank pulley groove.</TD></TR></TABLE>



When I put them on they were aligned in the correct grooves. I actually triple checked the belts, alignment and bolt tightness prior to firing up the motor.

I'm wondering if the lower pulley that holds the tension between the crankshaft pulley and alternator pulley isn't adjusted properly and is causing the belt to slip.

Also, I'm running a goodyear gatorback belt for the alternator that seems to sit rather high on the JRSC alternator pulley - so I'm wondering if that might be part of the problem. I can always go with another 4PK800 belt if that gatorback isn't ideal.

The other gatorback I'm running from the alternator to the JRSC fits like a champ and is sitting perfectly.


EDIT: I just talked to Mythias and he thinks it's just the belt stretching. I'm gonna re-adjust the tensioner and reset the belt on the pulley.


Modified by nholmes at 6:55 PM 5/11/2006

 

I'm stumped, I just re-adjusted the belt and the tension but it's still walking off of the pulley. Not sure what to do next.

Looks like that new alternator belt is going to have to be replaced as it's fraying already.

 

That sucks!! Everything is aligned correctly? And bolts tightened?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by walker111 &raquo;</TD></TR><TR><TD CLASS="quote">That sucks!! Everything is aligned correctly? And bolts tightened?</TD></TR></TABLE>

Yeah as far as I can tell.

Got someone coming by tomorrow to take a look at it.

 

I had the same thing happen to me last week. I replaced the alt. belt (due to wearing 60K) and verified that it was properly installed. The following day the belt walked and went fubar on the rest of the belts. The ac belt screwed and ripped the AC pulley off the side of the bracket. I limped the car home over two hours with just two ribs left on the alt belt... no ac or ps.

What size belts do you have? I've discovered that the stock belt (what the computer at the acura dealership or parts store) is too long. I think they call for a 33" belt?? I believe I used a 32" belt and it works perfect for me. 31 1/2 was just a bit small and anything larger that 32" I couldn't get tense enough.

maybe that helps...

BTW... I have an almost identical setup as you.

-edit-

The bolt (number 23) finally arrived today at the local Acura dealership. It's the bolt I need to reattach the pulley for the ac properly. It got sheared off during the belt fiasco. Sucks that the car is in the body shop... that bolt gets the middle finger.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dsav4shawn &raquo;</TD></TR><TR><TD CLASS="quote">The ac belt screwed and ripped the AC pulley off the side of the bracket. I limped the car home over two hours with just two ribs left on the alt belt... no ac or ps.

-edit-

The bolt (number 23) finally arrived today at the local Acura dealership. It's the bolt I need to reattach the pulley for the ac properly. It got sheared off during the belt fiasco. Sucks that the car is in the body shop... that bolt gets the middle finger.</TD></TR></TABLE>

Been there, done that... no **** - I'm f'ing serious.

EDIT: I'm also no longer running AC, but I don't need it.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dsav4shawn &raquo;</TD></TR><TR><TD CLASS="quote">What size belts do you have? I've discovered that the stock belt (what the computer at the acura dealership or parts store) is too long. I think they call for a 33" belt?? I believe I used a 32" belt and it works perfect for me. 31 1/2 was just a bit small and anything larger that 32" I couldn't get tense enough.

maybe that helps...

BTW... I have an almost identical setup as you. </TD></TR></TABLE>

The JRSC belt is 4PK595
Alt belt is 4PK800 and the factory size is 4PK765

Are you running goodyear gatorback belts?

I've got a gatorback in 4PK800 and a regular no name belt. I'm thinking that the grooves and the rubber in the gatorback is causing it to walk off the pulley.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nholmes &raquo;</TD></TR><TR><TD CLASS="quote">
The JRSC belt is 4PK595
Alt belt is 4PK800 and the factory size is 4PK765

Are you running goodyear gatorback belts?

I've got a gatorback in 4PK800 and a regular no name belt. I'm thinking that the grooves and the rubber in the gatorback is causing it to walk off the pulley.
</TD></TR></TABLE>
I've had good luck with the basic Advanced Auto belt... maybe it's a dayco or some crap like that. I'll look for the part number in the morning (but I know it's about an inch shorter than OEM. With the JRSC... it's an art getting the belts to hang on there. I now feel like I could change all the belts with about 3 tools and a blindfold on + drunk (Brad taught me everything I know) : P. Currently I'm using all dayco (I think that's sp right?) belts except the ac belt which I'm running Acura OEM.

Here's what I've noticed...
PS- doesn't matter (proper size only matters and it's easy to swap)
AC- use the oem belt
Alt/crank- 32" (dayco seems to work for me)
SC- again... i just found the Dayco replacement and haven't broken one yet.

GL... I'll try to find the part numbers for you.

 

So I spent a good portion of the day wrestling with this problem and managed to change my oil and filter in the process.

It's still not fixed.

I also tried loosening and re-adjusting the alternator but the JR bracket prevents any movement. I'm totally stumped as to how the angle would be off enough to make a brand new belt walk off the pulley.

I'd really like to know why in the fuq JR designed an alternator pulley with no lip. That's gotta be the stupidest f'ing thing I've ever seen.

I mean, there are really only three pulleys and a belt... let's try and rule out what the problem might NOT be.


Well, starting with the crankshaft pulley I'm going to rule that out first since there would be all sorts of problems if that was misaligned.

Second, I'm going to rule out the alternator because the JR bracket that comes with the kit prevents any front-to-rear motion whatsoever. (I'd also like to add that I inspected the JR alternator pulley and it's free from damage and any abnormal wear.)

Third, I'd like to rule out the lower tensioner since all of the bolts are set properly and nothing is stripped out. Not to mention, the belt was set with a pretty good amount of tension. I mean, **** I've tried it now with like 5-6mm of play and as tight as 2-3mm of play and the f'ing belt still walks off the pulley.

Fourth, I'm going to rule out the belt because it's a brand new plain jane 4pk belt.

That leaves me with... well nothing.



<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dsav4shawn &raquo;</TD></TR><TR><TD CLASS="quote">GL... I'll try to find the part numbers for you. </TD></TR></TABLE>

Please do, I'm up for anything at this point.


Modified by nholmes at 10:12 PM 5/13/2006

 

Call me tomorrow morning.. we will get it worked out.

-EDIT-

Going through my old emails, this is the third issue with a goodyear belt "walking" off the moss motorsports JRSC alt stepper pulley. If all other variables have been eliminated, then try a different brand belt. I have tried a few brands, but I tend to stick with BANDO, which is what moss motorsports ships with the JRSC kits. If you need it, I have one spare 4PK800 (new) from my setup before I changed stepper pulleys.


Modified by Mythias at 2:39 AM 5/14/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mythias &raquo;</TD></TR><TR><TD CLASS="quote">Call me tomorrow morning.. we will get it worked out.</TD></TR></TABLE>

They should rename the Eaton charger and call it the Mythias charger.

Mythias = the master.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mythias &raquo;</TD></TR><TR><TD CLASS="quote">Call me tomorrow morning.. we will get it worked out.

-EDIT-

Going through my old emails, this is the third issue with a goodyear belt "walking" off the moss motorsports JRSC alt stepper pulley. If all other variables have been eliminated, then try a different brand belt. I have tried a few brands, but I tend to stick with BANDO, which is what moss motorsports ships with the JRSC kits. If you need it, I have one spare 4PK800 (new) from my setup before I changed stepper pulleys.


Modified by Mythias at 2:39 AM 5/14/2006</TD></TR></TABLE>

I've tried two types now and both of them seem to have issues. I'm willing to give that BANDO belt a shot.

 

Just thought I would put a follow up post in this thread for anyone else that happens to search and come across this...

So I was able to finally fix this issue with the alt belt walking off the pulley by doing two things.

1. The 17mm nut on the lower tensioner was lacking the washer that sits between it and the pulley. (This alone may have solved it)

2. The last run I did with the caR included really tightening the belt. I'm talking like 2x what is recommended by Honda in the service manual.

The belt isn't taut enough to play like an instrument, but it's tight enough to make you go when you push on it or twist it.

Well, that about wraps it up.

 

Funny (not really) that a stupid washer on the pulley would give you such a hard time...

Glad to hear it's all up.

Have you noticed how tough it is to tighten that 17mm on the pulley once you've tightened the belt up? That nut nearly disappears under the hood somewhere. \

 

allmotor/. problems

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GUILOTINE &raquo;</TD></TR><TR><TD CLASS="quote">allmotor/. problems</TD></TR></TABLE>

GTFO!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dsav4shawn &raquo;</TD></TR><TR><TD CLASS="quote">Have you noticed how tough it is to tighten that 17mm on the pulley once you've tightened the belt up? That nut nearly disappears under the hood somewhere. \</TD></TR></TABLE>

The nut on the lower tensioner assembly is a self-locking nut with a nylon insert. When tighenting it, it will fell much tighter than it actually is. A common problem is that people think it is torqued to spec when it is actually quite loose.