List of Replacement Alternator Belts

dehager · 07-21-2004, 07:22 AM

I needed to help someone find a replacement alternator belt on the road and waisted a lot of time searching for aftermarket numbers. I am sure you can understand how frustrating it can be trying to deal with the people who... lack imagination ;-) and that includes some dealers. I want to compile a list of replacement belts, please check and comment if you have additional information, Thanks!

Oilhead Poly-V Belt
# 4 PK 611 (06/1992 - 06/2003) 61.1cm = 24.05in
---------------------------------------------------
12 31 1 341 779 BMW current part number
12 31 1 342 087 BMW expired part number 10/15/2002
12 31 1 341 549 BMW expired part number 07/17/1996

.......4 04 024 5 Goodyear Gatorback Poly-V Belt
.......5 04 024 0 Dayco Poly Cog Belt
.......K 04 023 3 CarQuest Poly-V Belt
NBH25 04 023 3 NAPA Alternator

Oilhead Poly-V Belt
# 4 PK 592 (07/2003 - CURRENT) 59.2cm = 23.30in
---------------------------------------------------
12 31 7 681 841 BMW current part number

stunt clown · 07-21-2004, 04:52 PM

Good info. Thanks for posting.

dehager · 07-21-2004, 05:51 PM

Added one more, Thanks Charlie.

NBH25 04 023 3 NAPA Alternator

bmwmick · 07-22-2004, 08:25 AM

Dana,
Thanks for putting this alternator belt list together.
At the bottom of your posting, you have the new P/N

Oilhead Poly-V Belt (Now called the ELAST Belt)
# 4 PK 592 (07/2003 - CURRENT) 59.2cm = 23.30in
---------------------------------------------------
12 31 7 681 841 BMW current part number
__________________

It's no longer called a Poly-V Belt by BMW. Since the introduction of the freewheel alternator pulley, the belt is now called the ELAST Belt. Never needs retensioning and is to be replaced every 36,000 miles. There is a special tensioning tool too. They call it ELAST because it is elastic and stretches. Some of the early applications with the freewheel pulley, got the standard Poly-V belt because of a supply shortage. These engines will have a White dot at the top of the front cover and a molded triangle at the bottom. The Poly-V Belt 'can' be used on the new freewheel pulley but the ELAST Belt 'cannot' be used on the early style pulley.

BTW I've been using the Goodyear Gatorback belt on my '96 R1100RT for about a year now. 4040245

Mick

Jim Bud · 07-22-2004, 10:23 AM

I have both a '95 r1100r and a '01 r1150gs....and it's not clear from your posts which of these belts relates to which of my bikes???

Can you give me any clarification??

I'm interested, since both bikes are still running on the original belts and I know it's time to change them........36,000 miles on one(r1100r) and 25,000 miles (r1150gs)on the other...

The r1100r is still running on the original v-belt....

Thanks for your help..

JIm Bud

dehager · 07-22-2004, 10:32 AM

Quote:

Originally Posted by Jim Bud

I have both a '95 r1100r and a '01 r1150gs....and it's not clear from your posts which of these belts relates to which of my bikes???

Can you give me any clarification??

Look at the dates, any of the belts listed should fit. OEM from Chicago is $11 cheapest belt I have found online is a Goodyear for $6.41 from

http://www.pickproparts.com/PartsLis...Number=4040245

Oilhead Poly-V Belt
# 4 PK 611 (06/1992 - 06/2003) 61.1cm = 24.05in
---------------------------------------------------
12 31 1 341 779 BMW current part number
12 31 1 342 087 BMW expired part number 10/15/2002
12 31 1 341 549 BMW expired part number 07/17/1996

.......4 04 024 5 Goodyear Gatorback Poly-V Belt
.......5 04 024 0 Dayco Poly Cog Belt
.......K 04 023 3 CarQuest Poly-V Belt
NBH25 04 023 3 NAPA Alternator

Jim Bud · 07-22-2004, 11:22 AM

Are you saying these are all V-belts only and will only fit the early r1100 oilheads....but not the later r1150 with the flat type of belts??

Jim Bud

bmwmick · 07-22-2004, 11:30 AM

Quote:

Originally Posted by Jim Bud

Are you saying these are all V-belts only and will only fit the early r1100 oilheads....but not the later r1150 with the flat type of belts??

Jim Bud

Jim,
These are ALL flat-style belts. They call them Poly-V belts because they are made with 4 small grooves. Like Dana said, look at the dates. 12 31 1 341 779 should fit both your Oilheads.

Mick

Jim Bud · 07-22-2004, 01:31 PM

don't the earlier oilheads have a true V type belt; except that they were then retrofitted with a Poly ( flat) type belt; if so, mine still has the original V belt...any thoughts??

JIm

bmwmick · 07-22-2004, 01:56 PM

Makalu · 07-22-2004, 02:10 PM

Speaking of alternator belts... I attended the seminar on winning the Iron Butt (by Paul Taylor) last week at the BMWMOA rally, and spoke with Dick Fish afterwards. He had a great method for replacing an alternator belt on the road if your belt breaks (without taking out the three bolts to release the tension, etc.). Basically, take the cover off, put the new belt over the large pulley and start it onto the small pulley. Then get a 16mm (?) socket from the tool kit and place on the nut to turn the motor over and the belt will pop onto the small pulley. He said the entire process takes less than 5 minutes, with most of the time being spent taking off and putting back on the cover.

I haven't tried it yet, but it sure sounds like something to keep in your bag of tricks when your belt breaks at oh-dark thirty in the middle of nowhere.

07-21-2004, 07:22 AM	#1
dehager Gnarly Adventurer Joined: Sep 2003 Location: Nazareth, PA Oddometer: 273	List of Replacement Alternator Belts I needed to help someone find a replacement alternator belt on the road and waisted a lot of time searching for aftermarket numbers. I am sure you can understand how frustrating it can be trying to deal with the people who... lack imagination ;-) and that includes some dealers. I want to compile a list of replacement belts, please check and comment if you have additional information, Thanks! Oilhead Poly-V Belt # 4 PK 611 (06/1992 - 06/2003) 61.1cm = 24.05in --------------------------------------------------- 12 31 1 341 779 BMW current part number 12 31 1 342 087 BMW expired part number 10/15/2002 12 31 1 341 549 BMW expired part number 07/17/1996 .......4 04 024 5 Goodyear Gatorback Poly-V Belt .......5 04 024 0 Dayco Poly Cog Belt .......K 04 023 3 CarQuest Poly-V Belt NBH25 04 023 3 NAPA Alternator Oilhead Poly-V Belt # 4 PK 592 (07/2003 - CURRENT) 59.2cm = 23.30in --------------------------------------------------- 12 31 7 681 841 BMW current part number __________________ Dana E Hager Nazareth, PA 95 R1100RSL http://users.rcn.com/dehager/ dehager screwed with this post 07-21-2004 at 05:50 PM.

07-21-2004, 04:52 PM	#2
stunt clown Spaztic Joined: Jul 2003 Location: Peoria, IL Oddometer: 343	Good info. Thanks for posting. __________________ A journey of a thousand miles begins with a single step. Of course, so does falling down a flight of stairs. A pessimist is never disappointed.

07-21-2004, 05:51 PM	#3
dehager Gnarly Adventurer Joined: Sep 2003 Location: Nazareth, PA Oddometer: 273	Napa Added one more, Thanks Charlie. NBH25 04 023 3 NAPA Alternator __________________ Dana E Hager Nazareth, PA 95 R1100RSL http://users.rcn.com/dehager/

07-22-2004, 08:25 AM	#4
bmwmick Old and Slow....Sorta Joined: Nov 2003 Location: Arizona, USA Oddometer: 332	Dana, Thanks for putting this alternator belt list together. At the bottom of your posting, you have the new P/N Oilhead Poly-V Belt (Now called the ELAST Belt) # 4 PK 592 (07/2003 - CURRENT) 59.2cm = 23.30in --------------------------------------------------- 12 31 7 681 841 BMW current part number __________________ It's no longer called a Poly-V Belt by BMW. Since the introduction of the freewheel alternator pulley, the belt is now called the ELAST Belt. Never needs retensioning and is to be replaced every 36,000 miles. There is a special tensioning tool too. They call it ELAST because it is elastic and stretches. Some of the early applications with the freewheel pulley, got the standard Poly-V belt because of a supply shortage. These engines will have a White dot at the top of the front cover and a molded triangle at the bottom. The Poly-V Belt 'can' be used on the new freewheel pulley but the ELAST Belt 'cannot' be used on the early style pulley. BTW I've been using the Goodyear Gatorback belt on my '96 R1100RT for about a year now. 4040245 Mick __________________ "You can laugh at my behavior, That'll bother me" "don't you know there ain't no devil, there's just god when he's drunk" -Tom Waits, Heartattack and Vine

07-22-2004, 10:23 AM	#5
Jim Bud Beastly Adventurer Joined: Apr 2003 Location: Castle Rock, CO Oddometer: 3,393	A little confused about the belts I have both a '95 r1100r and a '01 r1150gs....and it's not clear from your posts which of these belts relates to which of my bikes??? Can you give me any clarification?? I'm interested, since both bikes are still running on the original belts and I know it's time to change them........36,000 miles on one(r1100r) and 25,000 miles (r1150gs)on the other... The r1100r is still running on the original v-belt.... Thanks for your help.. JIm Bud

07-22-2004, 11:22 AM	#7
Jim Bud Beastly Adventurer Joined: Apr 2003 Location: Castle Rock, CO Oddometer: 3,393	I must be stupid, but... Are you saying these are all V-belts only and will only fit the early r1100 oilheads....but not the later r1150 with the flat type of belts?? Jim Bud

07-22-2004, 01:31 PM	#9
Jim Bud Beastly Adventurer Joined: Apr 2003 Location: Castle Rock, CO Oddometer: 3,393	Thanks for the clarification, but don't the earlier oilheads have a true V type belt; except that they were then retrofitted with a Poly ( flat) type belt; if so, mine still has the original V belt...any thoughts?? JIm

07-22-2004, 01:56 PM	#10
bmwmick Old and Slow....Sorta Joined: Nov 2003 Location: Arizona, USA Oddometer: 332	No __________________ "You can laugh at my behavior, That'll bother me" "don't you know there ain't no devil, there's just god when he's drunk" -Tom Waits, Heartattack and Vine

07-22-2004, 02:10 PM	#11
Makalu Beastly Adventurer Joined: Oct 2003 Location: Event horizon Oddometer: 2,530	Speaking of alternator belts... I attended the seminar on winning the Iron Butt (by Paul Taylor) last week at the BMWMOA rally, and spoke with Dick Fish afterwards. He had a great method for replacing an alternator belt on the road if your belt breaks (without taking out the three bolts to release the tension, etc.). Basically, take the cover off, put the new belt over the large pulley and start it onto the small pulley. Then get a 16mm (?) socket from the tool kit and place on the nut to turn the motor over and the belt will pop onto the small pulley. He said the entire process takes less than 5 minutes, with most of the time being spent taking off and putting back on the cover. I haven't tried it yet, but it sure sounds like something to keep in your bag of tricks when your belt breaks at oh-dark thirty in the middle of nowhere.

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