Monday, January 14, 2008

03 Cobra Supercharger Belt tensioner

I had the pulley bearing go out on the supercharger belt tensioner on my 03 Cobra. No biggie I thought, so I pulled the old one off and called Ford for a replacement. Each of the three dealerships I called told me that you could not buy just the tensioner and pulley, but rather you had to buy the entire assembly for $385 that consists of a large bracket, the tensioner assembly, and a couple of idler pulleys!

Anyway, I went down to the nearest one, and one of the guys cross referenced the part # (1L3Z-6B209-BA) on the side of the tensioner arm and found that the tensioner was re-used in another application and in that application was available separately, so he got me one for around $75! It's Ford Part # 1LZ 6B209 BA.

I hope this helps someone in the future!

Friday, January 11, 2008

5.0 belt lengths

While I'm on the topic of belts... One of the frequently asked questions I see online is, "If I want to bypass the on my 5.0, what length belt should I use?" This chart answers that. (Given stock pulley diameters.)



If you are running a non-standard accessory arrangement, or are using a configuration not shown above, here's how to get the right belt:

1) Take a string and wrap it around the pulleys using the same routing the belt would follow.

2) Mark the string with a marker where it finishes a loop.

3) Remove string and measure from end to mark. Add 1" to allow some play for tensioner.

4) Take that measurement to parts store. Buy 3 belts, one the length you measured, one .5" longer, and one .5" shorter. Ask for a "K6" (6 ribs) in xxx length.

5) Try the belts, keep the one that fits, return the other two.

6) Write the length down so you don't forget!

Done!

I saved this image long ago and forget where I got it now :-/. If it is yours, please let me know and I'll take it down, an/or give you credit for it!

Thursday, January 10, 2008

03 Cobra supercharger belt routing

03 Cobra supercharger belt routing diagram:


I had an idler pulley go out on the supercharger belt on my 03 Cobra, and it took me a while to find a diagram for how to get it back on there, so I figured I'd post this one to help anyone else out in the same situation.

Edit: I uploaded the main belt routing here