Drivetrain (Cooper S) MINI Cooper S (R53) intakes, exhausts, pulleys, headers, throttle bodies, and any other modifications to the Cooper S drivetrain.

Drivetrain Belt Tensioner Diminsions Needed

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Old Aug 26, 2006 | 04:06 PM
  #1  
forestcrump's Avatar
forestcrump
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Joined: Mar 2006
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From: baton rouge, louisiana
Belt Tensioner Diminsions Needed

Hello All,

I hope someone out there can help me with the diminsions for the belt tensioner tool.

All I need to know is the size of the studs that fit into the tensioner hole locations and the distance from pin to pin. I can make the rest work.

I have done an extinsive search of this site and cannot find it anywhere...

It would be easy to make with some bolts, nuts,and flat iron from lowes or home depot.

Forest
 
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Old Aug 26, 2006 | 07:03 PM
  #2  
hb/w06mcs's Avatar
hb/w06mcs
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Joined: Apr 2006
Posts: 46
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From: chicago burbs
~ 7mm diam

don't have the exact diameter but can get one part of it rolling. I just finished giving up on my flat iron piece tool. I was doing a 2% install today and had used some pins made from 6mm srews through a flat steel piece. I even had made it out of two sections of flat steel screwed together. (read this as no welder in the garage). The bar I made had to much lateral movement and allowed the pins to pull out as you really leaned into it to get to the second hole in the spring strap. It was enough to get it off for the uninstall, but not enough to compress further on the reinstall. So basically stuck there with no way to recompress it when I realized I needed just a bit more play in the belt. Since I had just put on a brand new crank pulley I was not going to pull it back off and risk damaging it. I used a 7mm screw that I had and it fit with just a bit of play in the holes. I found that my floor jack handle fit really well in there with the top bolt of the tensioner backed out about 1/2" (sorry to whoever mentioned leaving the top bolt backout a little...) Then the jack handle gave me plenty of torque to get the tensioner pulled back far enough for the oem belt on the 2% crank w/o supercharger pulley. So that "macgyver" approach while not reccomended was solid and enough to get me back together again. If using the Home depot approach at least get angle iron or perhaps pipe. with the pins it doesn't take much lateral movement to really make it a pain.
 
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