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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications N55 oil valve bypass reduced operating temps by 40 degrees
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      12-04-2016, 04:54 PM   #1
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The same procedure on the N54 works amazingly well on our N55's. I reversed the spring position and viola average operating temps 200 degrees. Running hard is about 215. Car is running at its max performance, no timing pulled due to heat. Very pleased with the mod. I let the car get to about 180 before dipping into boost to avoid oil starvation. Takes a little bit longer to warm up, but I live in California so no worries here.
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      12-04-2016, 04:57 PM   #2
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      12-04-2016, 07:10 PM   #3
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Does this damage anything in anyway long term?
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      12-04-2016, 10:03 PM   #4
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Quote:
Originally Posted by DigitalNav View Post
Does this damage anything in anyway long term?
I've never heard of people having problems running lower oil temps. I also believe the spring was set to expand around 240 for emissions. I think the possible damage that could occur is the oil starvation so be careful to warm up the oil before stepping on it.
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      12-04-2016, 10:06 PM   #5
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I also think this is a necessary mod if you're running a tune, timing has been advanced and your running hotter. Any cooling you can get wether it be a oil, meth injection, e85, a real CAI, FMIC or DEI wrapping should be considered.

Here's a nice little blog on the BMS oil bypass http://oppositelock.kinja.com/my-tho...ass-1687405218

Using the stock valve mod doesn't allow for 100% bypass and thus making it a very good street application for those of us running higher boost.
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