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Nanometer Nanometer is offline
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Car: 335i, 2009
Default X5 50i (N63) Coolant Leak - 09-11-2018, 09:13 AM

Hey All! I have the described car and it has a coolant leak coming from the driver side. Approximate location is between the heater core ***** which appear to be dry, and the reservoir, so basically somewhere in that region. Do you guys have any idea what that could be? Recent replacements were Thermostat, and the "T" fittings which are on top of the engine. Engine was leak free for a few months, and then this issue popped up seemingly very suddenly. Pressure Testing at 15 PSI creates a sizable puddle pretty quickly. Really appreciate your guys' thoughts!
Potential issues: Reservoir, some coolant line that I can't see?


335i E90 2009 ///M Sport Auto
Mods: | Wagner Intercooler | MeowPipe | Meth-Trunk | JB4 | Pump_Back_End_Flash | Fuel-it! Stage 2
Drivetrain--------ForgeStar F14 Wheels 18" (245 & 275 PS4) | XHP L3 Transmission Flash | Wavetrac LSD
Suspension-------KW V3 Coil Overs| M3 RSF Bushings and Dif Bushings | H&R Sways


X5 50i 2013 ///M Sport
BMS Stage 1

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Nanometer Nanometer is offline
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Posts: 594
Join Date: Jan 2014
Car: 335i, 2009
Default 09-11-2018, 10:55 PM

Adding a picture. Area for leak is in red. Basically the bolt get's wet when I pressurize the system. I know it isn't easy from this picture, but hope it helps!
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335i E90 2009 ///M Sport Auto
Mods: | Wagner Intercooler | MeowPipe | Meth-Trunk | JB4 | Pump_Back_End_Flash | Fuel-it! Stage 2
Drivetrain--------ForgeStar F14 Wheels 18" (245 & 275 PS4) | XHP L3 Transmission Flash | Wavetrac LSD
Suspension-------KW V3 Coil Overs| M3 RSF Bushings and Dif Bushings | H&R Sways


X5 50i 2013 ///M Sport
BMS Stage 1

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