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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,326
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Yeah, the IMS bearing is kinda strange. It has a very thin tin layer that wears off quickly, so it always looks like they are worn. But I haven't seen failures due to the IMS bearing shells, and it's not something people here have identified as a common problem. For sure, there are plenty of SC and 3.2 engines out there with 150Kmi, 200Kmi and more, that have never been split open, and that are running fine with their "worn out" factory original IMS bearings.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
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