accessories belts - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

019 · 11-13-2002, 03:45 AM

i just got my new accessories belts cuz my old ones are cracking.  i was going to put them in myself, but i'm not sure what the proper belt tension is.  can anyone help me there?  thanks.

Dousan_PG · 11-13-2002, 08:55 AM

i dnot know of a proper tension. i put them on, then snugged it up. did it again at the track (sqeeling) for the PS one, then today doing the alternator and the AC belt. just dont OVER tighten them. snug. look in the FSM, has a small description of tension on it.

019 · 11-13-2002, 04:56 PM

thanx dousan36.  i don't have the FSM, so i can't look anything up in there.

Archangel · 11-13-2002, 05:01 PM

If you want, I can look it up later.  I'm at work now.
I've got a Chilton manual (which kinda sux <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/huh.gif" border="0" valign="absmiddle" alt=':huh:'>) but it should have the tensions listed.  I'll try to remember to post back tonight.

019 · 11-13-2002, 07:23 PM

i'd really appreciate if you could do that, archangel.  thanks a bunch.  any help is always appreciated  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'>

Archangel · 11-13-2002, 10:54 PM

Okay, this is kinda vague, but maybe it will help.
the manual says to push on the belts with approximately 22lbs of force, (not sure how you know how hard you are pushing)  then measure how far the belt moves.
You are supposed to test it at a specific point.  I'll try to scan the diagram and post it.

Anyway, for a new belt it lists the following deflections:

Gernerator & Powersteering & oil pump:  5-6mm  or .20-.24 in
Air conditioner & compressor:                6-7mm or .24 -.28 in

Dousan_PG · 11-13-2002, 11:53 PM

i push till firm. has slack but not much

then after a few days, retighten them again (belt streches a bit)

i did mine again today. (lower ones since hae to jack up car)

fixed th etop one last week at the track.

Archangel · 11-14-2002, 02:22 AM

this pic shows where to measure the slack in each belt (the little triangles on middle diagram)
And the side diagrams show where the the adjusting bolts are for each belt.

If you want I scanned the pages with all the diagrams and charts. You can see both pages here:
Page 1
Page 2
The book covers the 240, and the altima, so only half of it is relveant.

bbp · 11-14-2002, 03:48 PM

a good rule of thumb for belts.  You should be able to twist the belt upside down and not much farther.  if you can twist past 180 degrees it's too loose, if you can't make twist at all, it's too tight.  

If it is too tight you will know because it will eventually spit the belt out.  too loose it will squeal.

11-13-2002, 03:45 AM	#1
019 Zilvia Addict Join Date: Sep 2002 Location: blacksburg, va Posts: 697 Trader Rating: (0) Feedback Score: 0 reviews	i just got my new accessories belts cuz my old ones are cracking.  i was going to put them in myself, but i'm not sure what the proper belt tension is.  can anyone help me there?  thanks. __________________ Red '96 240sx www.streetdynamics.com

11-13-2002, 08:55 AM	#2
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	i dnot know of a proper tension. i put them on, then snugged it up. did it again at the track (sqeeling) for the PS one, then today doing the alternator and the AC belt. just dont OVER tighten them. snug. look in the FSM, has a small description of tension on it. __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

11-13-2002, 04:56 PM	#3
019 Zilvia Addict Join Date: Sep 2002 Location: blacksburg, va Posts: 697 Trader Rating: (0) Feedback Score: 0 reviews	thanx dousan36.  i don't have the FSM, so i can't look anything up in there. __________________ Red '96 240sx www.streetdynamics.com

11-13-2002, 05:01 PM	#4
Archangel Zilvia Junkie Join Date: Sep 2001 Location: Cincinnati, OH Posts: 425 Trader Rating: (0) Feedback Score: 0 reviews	If you want, I can look it up later.  I'm at work now. I've got a Chilton manual (which kinda sux <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/huh.gif" border="0" valign="absmiddle" alt=':huh:'>) but it should have the tensions listed.  I'll try to remember to post back tonight. __________________ White 98 s14

11-13-2002, 07:23 PM	#5
019 Zilvia Addict Join Date: Sep 2002 Location: blacksburg, va Posts: 697 Trader Rating: (0) Feedback Score: 0 reviews	i'd really appreciate if you could do that, archangel.  thanks a bunch.  any help is always appreciated  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''> __________________ Red '96 240sx www.streetdynamics.com

11-13-2002, 10:54 PM	#6
Archangel Zilvia Junkie Join Date: Sep 2001 Location: Cincinnati, OH Posts: 425 Trader Rating: (0) Feedback Score: 0 reviews	Okay, this is kinda vague, but maybe it will help. the manual says to push on the belts with approximately 22lbs of force, (not sure how you know how hard you are pushing)  then measure how far the belt moves. You are supposed to test it at a specific point.  I'll try to scan the diagram and post it. Anyway, for a new belt it lists the following deflections: Gernerator & Powersteering & oil pump:  5-6mm  or .20-.24 in Air conditioner & compressor:                6-7mm or .24 -.28 in __________________ White 98 s14

11-13-2002, 11:53 PM	#7
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	i push till firm. has slack but not much then after a few days, retighten them again (belt streches a bit) i did mine again today. (lower ones since hae to jack up car) fixed th etop one last week at the track. __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

11-14-2002, 02:22 AM	#8
Archangel Zilvia Junkie Join Date: Sep 2001 Location: Cincinnati, OH Posts: 425 Trader Rating: (0) Feedback Score: 0 reviews	this pic shows where to measure the slack in each belt (the little triangles on middle diagram) And the side diagrams show where the the adjusting bolts are for each belt. If you want I scanned the pages with all the diagrams and charts. You can see both pages here: Page 1 Page 2 The book covers the 240, and the altima, so only half of it is relveant. __________________ White 98 s14

11-14-2002, 03:48 PM	#9
bbp Zilvia Junkie Join Date: Apr 2002 Location: oHIo Age: 53 Posts: 477 Trader Rating: (0) Feedback Score: 0 reviews	a good rule of thumb for belts.  You should be able to twist the belt upside down and not much farther.  if you can twist past 180 degrees it's too loose, if you can't make twist at all, it's too tight.   If it is too tight you will know because it will eventually spit the belt out.  too loose it will squeal. __________________