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Discussion Starter #1 (Edited)
I just though I'd pass this along for folks who were either considering doing the short belt mod on their NG900. There has been some confusion and some who have gone to Napa or other places and were given the wrong belt length.

The best fitting short belt is:
6PK-2460 is the best length for the NG900's
6PK-2345 in the best length for the 9-3's


Napa has the 6pk-2470 listed for the ng900 which is a bit too long. and the saabsite.com has 6pk-2480 which is even worse.

The 9-3 comes from the factory with the short belt and no center tensioner pully.

UPDATE:
The 9-3 uses 4961066 (6PK-2345)
The 5590344 (6PK-2415) is for the 9-5 with "short belt" configuration.
The NG900 with "short belt" configuration use 6PK-2460

The 4 digits after the dash indicate belt length in mm
 

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That's good to know SPATL. I was going to do the short belt mod but could only find a 2475. I almost got it, but in the end decided it would be safer to just replace both idlers and get the original belt(which was actually cheaper).

Just in case anyone isn't aware, the 2460 belt is for the NG900 with air conditioning.
 

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Discussion Starter #4
CleveSaab said:
In 2000 maybe. The 99 9-3 has 2 pulleys...
There was a mid year VIN # split. My '99 9-3 came shortbelt from the factory(car made in 3/99). Maybe the earlier MY 99's came with the center tensioner.

So correction, some '99 9-3's have the short belt mod, and some don't.

Thanks cleve.
 

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my 98 uk spec 9-3 has the short belt from factory, wouldn't you have thought that the factory would standardize things all at the same time :roll:
 

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Discussion Starter #7
boxman said:
my 98 uk spec 9-3 has the short belt from factory, wouldn't you have thought that the factory would standardize things all at the same time :roll:
My only guess would be that different factories may have done it differently. What is confusing is that, I believe,(ocrrect me if I am wrong Stalker) Stalkers 9-3SE was made in late '98 and had the short belt as well.
 

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mines a uk 99 9-3 and it has the short belt,thanks for the info on what belt to get,as looking at the previous owners dealers receipts it hasnt been changed, 69000 miles on the clock at the moment.the belt on the partsforsaabs site is quoted as a 6k-2345 is this right.
 

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Anyone make a note of the clearance between the top of the belt on the tensioner pulley and the idler pulley above it when converting to the 2460 mm belt? Or check if the tensioner is within limits after a few months?

The 2460 mm belt is a bit long on my car and the tensioner arm came out just past the limit marks. A belt that is on the loose side does no harm, but the clearance is extremely small, so the belt on top of the tensioner pulley comes very close to the idler pulley. My clearance was just less than 1/4 inch, which allows for little stretch over the life of the belt.
 

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Did some research on belt part numbers at napa's online site and found the next smaller belt from the 2460 was 6pk2455 which equals their pbh4060966 belt and they say it is 96.7 inches long.
 

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Just for the record, I put in a 2465 belt (goodyear gatorback) on my car ('94 S) and it has been fine for about 2k miles so far. The tensioner markings are right up to the edge of the range, but don't go over.
 

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I don't think the tension will change with a couple degrees of movement in the tensioner. Concern was the clearance between the tensioner and idler pulley.

The belt stretches over time, not much at 2k or even 10k miles. I was used to a new belt being at the other end of the range. I keep an eye on it since I was stranded twice and spent around $500 on tow charges and repairs before I figured out what was going on.

When I saw how close it was on my car compared to the stock belt, I thought the waterpump pulley was loose, but it is still solid. I will try the 2455 mm belt when I get a chance, thanks.
 

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SPATL said:
The best fitting short belt is:
6PK-2460 is the best length for the NG900's
6PK-2345 in the best length for the 9-3's

For NG900, what about a Gates Micro-V K060966? (checking the Gates website at www.gates.com, and digging a little):

Effective Length (In.) 96.66
Effective Length (mm) 2455
Number of Ribs 6
Outside Circumference (In.) 97.25
Outside Circumference (mm) 2470
Top Width (In.) .84
Top Width (mm) 21
Product Attributes Section K
Weight Weight (Lbs.) 0.65

There seems to be some agreement that the 'best' length for the new belt might be a little shorter than 2460, like 2455 (though 5 mm isn't much). So googling "6pk2455" I came up with one obscure reference to C4 Corvettes in New South Wales, which was pretty well useless except that there was a cross reference to the above part number.

Looking at Gates's site, it looks like this belt is the right length and number of grooves, and is in fact intended for automotive use.

Looks good, but does anybody know anything about these belts? Anybody used one?

Cheers,
T

EDIT: Looks like NAPA and Gates belts are the same-- has anyone used a NAPA belt?
 

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Gates Parts(hoses,belts,etc) are high quality items, no trouble at all with recommending.
But I can't understand why some have a little trouble with 2460 (needing 2455), yet others can get away with 2470.
Maybe the method of measuring varies, or the replacement pulley may be slightly larger/smaller, or a replacement alternator had a different sized pulley...
Find out which brand the big rigs and busses are using - for them, only the best will do....
 

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I did the short belt mod on my '95 900S just a couple of weeks ago and I used the Goodyear Gatorback 4060970 / 6PK2465 belt. It worked out perfectly.
 

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earthworm said:
...I can't understand why some have a little trouble with 2460 (needing 2455), yet others can get away with 2470. Maybe the method of measuring varies, or the replacement pulley may be slightly larger/smaller, or a replacement alternator had a different sized pulley...
I measured with the Saab oem pulley, from a Saab dealer. I also have an old one to compare. The marks on top of the tensioner arm are hard to see. The common interpretation is that if the arm is near the end mark all is ok, but it is not. Nobody looks at the clearance.

The space between the idler pulley, and the belt running on top of the tensioner pulley is very small, and I assume nobody really measures the gap. You replace an old stretched belt with a new short belt, the arm ends up in about the same place, so you tell yourself it fits fine.

With the 97" belt (2460 mm), mine was down to 1/8. This with a new belt, before any stretch over time! In other words, if this belt stretches by 0.2-0.3% over time, it will make contact, so I plan to replace it with the next smaller size tidewatersaab found.

The other variable is that belt length will vary a bit between manufacturers on the same part.
 

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Thanks for your help, guys! I've ordered a Gatorback 2455 based on your feedback-- sounds like it will work pretty well.

Regards,
T
 
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