Hey guys. I need some quick help. I have an 05 MCS with a 16% and a 2% crank pulley. I was at the track when I lost power and the temp gauge shot up. Anyway, it turns out that I shredded the belt. I have about 8500 miles on the car. I need to pick up a belt today but not sure on what size. Can anyone tell be what size serpentine belt I need?
Thanks.

 

Will @ M7 told me that the stock size was correct for that combo. What size were you running?

 

If you go to NAPA, the 060539 will work. That's what i'm running with the M7 16%/2% combo.

 

Excellent. Thanks for the help and part number. I called NAPA and they do have them in stock. Does this sound right; they said it's made by Gates and the size is 54.521 inches.

 

All the NAPA belts and hose are made by Gates. 54.5" sounds right.

 

Partsman,

Have you had problems shredding belts with the 16/2 combo. I only have about 5k miles on that combo and 2 track days before mine shredded.

 

The only issue i've had was with a rock stuck in my AC compressor pulley, wiping out one single groove.
No other issues.
What belt were you running?

 

Actually I have no Idea what belt I was running. The mechanic put it on. I will put this one on though.
Do you run yours on the track?

 

Not yet.

Do you have a pic of the shred?

 

No pictures because I have no idea where it went. I only have a few thin strands of belt floating around the engine compartment.

 

I hope you have a tensioner stop.

 

I don't have one but the guy that's helping me with it has one.

 

Did you have any other damage from the belt braking?
The tensioner stop is cheap insurance, go with a custom cable type.

 

I don't think there is any other damage but I will find out tonight.

 

Hey Boludo,
I have seen a lot of these shredded belts and recommend that when anyone switches to a new SC pulley that they specify one with a "TRUFORM" TOOTH PROFILE. "TRUFORM" is the profile used by Original Equipment Manufacturers. The profile rounds the sharp peaks on the pulley and prevents premature belt wear and breakage, helps the belt track correctly, and runs quieter.
Loren

 

Cravenspeed, That does make sense to me. It does seem that mine are pretty sharp. If I continue to have problems I will switch them out.

Partsman, I actually misunderstood you when you asked if I had a tensioner stop. I thought you were talking about something different, so basically I have no clue what a tensioner stop is. Can you explain it.

 

A tensioner stop keeps the tensioner from whacking the crank pulley when the belt breaks...

The one pictured is the basic bar type, however there's a fine line between getting tight enough so it won't rattle, and not so tight where it won't slide.

I made a custom one out of some stainless cable and stainless ends with 8mm holes. This way I can tighten it down and the tensioner will still move normally.

 

Craven,

When I Google Truform tooth all I get is your site and a bunch of sites for pantyhose

Are you the only ones that use this wonder technology?

 

That's funny -- Yahoo! returned a bunch of prosthetics sites , and Jeeves took me to "marital aids"

 

Here at Craven Speed, we take pride in our inventive nature. We are into invention in all its various forms, including vocabulary... Google "Flexitize". As we all know a true inventor draws on previous experience and expertise to expand the known universe. When we set out to create we brought with us vast experience with pantyhose, prosthetics and marital aides. We applied our understanding of these topics to their most logical application… pulleys!

[FONT=&quot]In short, Truform is merely a word we use to describe the difference between our pulleys, and some other pulleys. It would be really low of us to go around naming other manufacturers parts that we feel are superior or inferior to ours. In fact, we are not sure how anyone who would do that could look at themselves in the mirror. We just suggest that you take a good look at the part you are considering purchasing and decide if it looks like one that will eat your belt. There are plenty of good pulleys out there![/FONT]

 

Thanks Partsman, that helps out with the picture.

 

Your welcome.
If you're on the track a lot, get some kind of tensioner stop on your car.

 

I was just replying to the previous post from CravenSpeed. Here is his quote

"I have seen a lot of these shredded belts and recommend that when anyone switches to a new SC pulley that they specify one with a "TRUFORM" TOOTH PROFILE. "TRUFORM" is the profile used by Original Equipment Manufacturers."


This lead me to believe that this was NOT an exclusive technology but more like "Mandrel" Bent exhaust. The poster should have said:


I have seen a lot of these shredded belts and recommend that when anyone switches to a new SC pulley that they specify one with a "TRUFORM" TOOTH PROFILE. "TRUFORM" was designed by Craven and is Similar to the profile used by Original Equipment Manufacturers.

 

Truform is not a term used by OEM, so you are correct, 'similar' would have been more appropriate.