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Vented Rotors/Volvo Calipers - E21 Turbines?

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I have tried this with several 13" alloy rims and have had no luck even after grinding the calipers for clearance.  And, by the way it is possible to grind too much off of the calipers in just the right place to produce a brake fluid fountain instead of the braking force desired.

The steel wheels definitely will not clear the calipers.

BMWCCA  Member #14493



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Standard Volvo calipers will not,  IE filled/repositioned Volvo calipers will.  I highly suggest against "slotting" volvo calipers.  Have seen too many instances of them coming loose.  If you go that  route, then make inspecting them a part of your regular maintenance routine.



Edited by AceAndrew
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If you go that hack-job route, 

I disagree slightly, here-

I've slotted several sets, and IF tightened properly,

haven't had any come loose.


If you're the type who rebuilds their own calipers, changes their own subframe bushings, 

and wouldn't hesitate to pop the head off to check the ring lands, go for it.


If you're not, and really don't jack the car up that often, spend the extra to get the modified

Ireland ones.  Then DO learn how to put new seals in them.  


My take.



"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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Also slotted my Girling calipers and inserted a steel dowel to take up the space and torque down the mounting bolts. IIRC it's something like 65ftlb which is fairly significant for the size of the bolt. On changing pads and rotors I saw no visible signs of movement. 

But onward to the question at hand, e21 turbines fit fine.

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