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Old 02-05-2013, 09:55 AM
cn90 cn90 is offline
Officially Welcomed to the 'Fest
Location: Omaha NE
Join Date: Mar 2006
Posts: 14,351
Mein Auto: 1998 528i 5-sp 140K+
Different modes of failure:

- Metal pipes in M52: the pipe is usually OK, if leak happens, it is because of O-ring failure with time/mileage.

- Plastic Pipe in M54: the pipe can crack in addition to the O-ring failure.
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