I run a Gates K060535 belt and have had no issues. I also have a 15% pulley and use the belt below: $ 15.52
Gates K060535 Multi V-Groove Belt : Amazon.com : Automotive
Also you may as will do the tensioner since they fail and you can get the same OEM one on Amazon for $76.00 Vs the Dealer $200.00 + for the EXACT same part down to the number stamped on the unit.
I replace mine every Spring.
Amazon.com: Gates 38404 Belt Tensioner: Automotive
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Dave.0 Helix & RMW PoweredLifetime Supporter
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Crashton Club Coordinator
Depending on the miles you have it well could be a tensioner. You are hearing the slip on cold start, but odds are good it is slipping at high rpm too you just can't hear it.
I change the belt out every 30,000 miles, because they will begin to slip. I believe NAPA belts are made by Gates.
I replace my tensioner every 110,000 miles whether it needs it or not.Also replace the idler pulley & if you have a lot of miles put an ATI damper pulley on there too. Don't forget a new crank seal.
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Dave.0 Helix & RMW PoweredLifetime Supporter
My parts guy was amazed and could only say OEM one comes with a 2 year warranty but for the cost of the Gates unit I could buy 3 vs 1 OEM unit.
BMW / MINI outsources replacement parts.-
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agranger MINI of the Month June 2009Supporting Member
I bought a water pump at the parts desk a few years ago when doing a deep service (Supercharger oil change). When I started having an intermittent electrical issue about 5-6 months later, I went back to the dealership for service. When they called me the next day to say that they would need to replace the water pump (bad shaft seal) before running the car to diagnose the electrical issue (apparently a strong leak) I told them that was great news. The service advisor was very confused, as he was calling to tell me about over a thousand dollars of unplanned work (a water pump replacement is 6-10 hours work). I said "Nope... that's great news because you have to cover it all... that's a new OEM part!" One quick email with the receipt and the new part and labor was free!
Just a reminder that sometimes the expense at the parts desk is a very small part of the total bill and the warranty is nice to have.-
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agranger MINI of the Month June 2009Supporting Member
On my bad water pump, they diagnosed the bad part and then specified that the seals were bad. I guess I just expected them to pay for the labor as the labor wouldn't be required if their part hadn't failed. They didn't let me down.
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The tensioner was replaced just before my car passed the 100,000mile mark.
The NAPA belts I used always slipped a bit in the winter. Even in its first year. Note...I am in Vancouver BC where it is generally cold (near freezing, but not actually freezing) and damp.
In the spring, summer and fall, I don't get any slipping. My mechanic buddy tells me most of the new belts slip a bit now because the rubber they use is rather susceptible to temperature swings here. I'm not sure if that's true, but the NAPA belts seem to be like that for tow of my cars. -
agranger MINI of the Month June 2009Supporting Member
I used a Gates (Part K060539) brand belt for years with my 16% pulley and never had any issue.
Here's a how-to article for the job:
Replacing the Serpentine Belt on an R53 MCS - Library -
Crashton Club Coordinator
Maybe a Hakkapellitta belt for winter.
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Tummi_Gummi New Member
Please link me the oem tensioner on amazon!! -
Dave.0 Helix & RMW PoweredLifetime Supporter
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