 Different pistons in my "M" calipers??, 1 side has guide pin, 1 is more dished |
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| Mueller |
 Nov 13 2005, 11:10 PM
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#1
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914 Freak!  Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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I took apart my 911 M calipers tonight and noticed that the pistons are different on the passanger side than the drivers side?
I have no idea if they came from the same car or not, I do know that the piston diameters are the same and other than the pistons (and guide pins), they appear to be identical. thanks |
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| Mueller |
Nov 14 2005, 09:50 AM
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#2
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914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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| dmenche914 |
Nov 14 2005, 10:10 AM
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#3
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Senior Member Group: Members Posts: 1,212 Joined: 27-February 03 From: California Member No.: 366 |
Mike: Is the guide pin (I am assumeing like the 914 has in the front) broken off? I have a front stcok 914 caliper in which someone used different pistons (hollow on outside) and hence they snapped off the cast in guide pins to make it work. I am replacing that bastard caliper, interesting what folks do.
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| davep |
Nov 14 2005, 11:06 AM
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#4
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914 Historian Group: Benefactors Posts: 5,262 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
(IMG:http://www.914world.com/bbs2/html/emoticons/thisthreadisworthlesswithoutpics.gif)
A lot of the VW calipers have the 'hollow' pistons, but I haven't seen it with the 911 calipers. I'd have to think that the caliper came from a different vehicle. Perhaps it could be a very early 911 caliper, I really don't know for sure. |
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| Eric_Shea |
Nov 14 2005, 12:32 PM
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#5
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PMB Performance Group: Admin Posts: 19,304 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
Later M-Calipers seem to come with the cup type pistons. My guess is over the years someone replaced the caliper because it was stuck and the shop simply ordered a replacement w/o specifying.
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