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Unread 11-09-2013, 07:25 AM   #1
fishman308
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Belt HELP please,

I am the very proud owner of -------- Year 2000' WJ Grand Cherokee, 4.7 V8 ( not HO ) Petrol with aircon etc all Std, I wanted to keep a spare V belt in the boot. My idea being to fit a new one then just keep the old under the spare wheel. Now the quiz for all you experts The belt I have been supplied is a DAYCO 6PK 2225' I take it that it is 2225 long. On looking on the web there seems to be a few different lengths. Can anyone PLEASE give me correct length, As I am disabled it would be a real pain to remove old belt and find new one wrong length. Help please,
Ps been on most jeep forums and this is the best by far, And after fifty years or so in trade I have a rough idea , LOL. Thanks so much in advance
Fishman308

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Unread 11-09-2013, 07:54 AM   #2
losttech
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I dont have the V8 but this site is the best for specific information on almost everything WJ wise.
Here is the belt link with part numbers
http://www.wjjeeps.com/serpentine.htm

I am sure someone else can chime in who has a V8.
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Unread 11-09-2013, 08:01 AM   #3
fishman308
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Quote:
Originally Posted by losttech
I dont have the V8 but this site is the best for specific information on almost everything WJ wise. Here is the belt link with part numbers http://www.wjjeeps.com/serpentine.htm I am sure someone else can chime in who has a V8.
Thanks so much for that, I had seen that one but unfortunately the part no"s don't seem to relate to length so still no wiser as to 2225 mm. Thanks again.
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Unread 11-10-2013, 10:34 AM   #4
imaguy3
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I'm just curious why you need the specific length? If the part number on the belt you were given says it works for your car then what's the issue?

After converting from your funny math to the standard system 2225mm = 87.6"

For what it's worth on Rockauto I found this

Dayco lists the belt with these specs...
Poly Rib Belt, Premium; Exceeds OE Specifications Effective Length 86.50 / Top Width .82 / No of Ribs 6 / Thickness 0.169

Goodyear lists this:
Gatorback; Poly-V; 6 Ribs / Effective Length 86.875" / Outside Length 87.625"

and for their "Mileage Maker" line from Goodyear this is listed:
Metric Part Number 6PK2205
Number of Ribs 6
Top Width in Inches 27/32
Effective Length in Inches 86 7/8
Outside Length in Inches 87 5/8

So if that 2225 is indeed the length I assume you'll be fine.
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Unread 11-14-2013, 10:48 AM   #5
fishman308
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Quote:
Originally Posted by imaguy3
I'm just curious why you need the specific length? If the part number on the belt you were given says it works for your car then what's the issue? After converting from your funny math to the standard system 2225mm = 87.6" For what it's worth on Rockauto I found this Dayco lists the belt with these specs... Poly Rib Belt, Premium; Exceeds OE Specifications Effective Length 86.50 / Top Width .82 / No of Ribs 6 / Thickness 0.169 Goodyear lists this: Gatorback; Poly-V; 6 Ribs / Effective Length 86.875" / Outside Length 87.625" and for their "Mileage Maker" line from Goodyear this is listed: Metric Part Number 6PK2205 Number of Ribs 6 Top Width in Inches 27/32 Effective Length in Inches 86 7/8 Outside Length in Inches 87 5/8 So if that 2225 is indeed the length I assume you'll be fine.
Hi there thanks for reply and homework. DAYCO list about four or so belts for same vehicle,the last figures of part no are the belt length in mm, They vary in length by ten to twenty MM or so with no real means apart from trying them in. Once fitted the belt tensioner has a scale and pointer and mark is given for exact length of a new belt. So really without trying a belt on I have no idea if it is the exact belt for my Jeep. All the belt manufacturers seem to give different info/length so no nearer. It looks as though rather than be let down by trying it on in an emergency I need to either fit it now ?? Or back to post if anyone knows right length.
Thanks again Fishman
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Unread 11-15-2013, 08:36 AM   #6
imaguy3
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Most of the manufacturers listed the outside length as 87.6 and the inner length in the 86.8 range... Assuming the belt you have is measured on the outside then it should work as that measurement matches all the others.
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Unread 11-15-2013, 09:50 AM   #7
fishman308
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Quote:
Originally Posted by imaguy3
Most of the manufacturers listed the outside length as 87.6 and the inner length in the 86.8 range... Assuming the belt you have is measured on the outside then it should work as that measurement matches all the others.
Thanks so much for that, That must be the bit that got me IE some give inside some outside, I couldn't see how they could all be right on the belt tensioner indicator IE 24mm when fitted. But you have explained it and very usefully to know.
Regards John
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Unread 11-15-2013, 01:15 PM   #8
js12278
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Coumpound EPDM, Aramid Reinforced
Backside Material Rubber
Rib Depth Standard
Top Width (in) 0.82
Metric Part 6PK2225
No. of Ribs 6
Rib Profile W Profile
Thickness 0.17
Effective Length (in) 87.60
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Unread 11-15-2013, 01:41 PM   #9
imaguy3
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yep... JS is correct... I just double checked what I did wrong... I guess 2000 4.7 uses a diff. belt than the 2004 4.7. The info. I posted is for the 2004, but using the 2000 model year it came up with what JS posted (I wonder why they use diff. length belts for same motor in same generation of car?)

OP you have the right belt, quit worrying
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Unread 11-15-2013, 02:43 PM   #10
fishman308
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[QUOTE="imaguy3"]yep... JS is correct... I just double checked what I did wrong... I guess 2000 4.7 uses a diff. belt than the 2004 4.7. The info. I posted is for the 2004, but using the 2000 model year it came up with what JS posted (I wonder why they use diff. length belts for same motor in same generation of car?) OP you have the right belt, quit worrying[/QUOTE

LOL brilliant would not have been bothered about 10 or 15 mm, till I saw the bit about the length indicator on the tensioner!. But thanks to all you chaps, I can sleep again now Cheers great forum by the way,
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Unread 11-18-2013, 03:38 AM   #11
fishman308
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The plot thickens, I had the bonnet up the other day just to check water/oil etc, I noticed the belt had stopped with the part no at the top. It reads 6pk 2215. So that is now another measurement to go for LOL, It would seem DAYCO only do 2210 or 2220' So my parts man is looking into it today, Did notice that some quote EFFECTIVE length ???. But now have the MOPAR no as well. Yes I know 10 mm is nothing hardly but it will effect the 24 mm marker on tensioner ??? Some do seem to be in metric and some in inches, And it would seem 99 - 2000 was one belt, then 2000 - 2001 was another then came 2001 - 2004' then after that think was the 2006/7 so seems a few belts to go at.
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Unread 11-18-2013, 05:14 AM   #12
Darnice
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Well, probably a waste of time carrying the belt anyway. They rairly fail. If you have replaced at say 50,000 miles its good for another 50,000 or more.
The belts fail usually because the idler or tensioner or waterpumps have failed, and destroyed the belt.
You would also have to carry i think a 15 MM wrench to rotate the tensioner to put a new belt on. But if a bearing failed, you woulld just destroy the new belt.
So change your belt, check the feel of the bearings on the idler,tensioner, waterpump. if any are not smooth,replace.
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Unread 11-18-2013, 07:19 AM   #13
imaguy3
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go to a dealership and give them this part# P/N 5135745AA (1999-2003 with 4.7)
http://wjjeeps.com/serpentine.htm

Then quit worrying about it.
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