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      07-09-2019, 02:53 PM   #1

Drives: 2005 BMW 525i
Join Date: Jun 2013
Location: Seattle

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Coolant leaking on 2005 BMW 525i

I recently notice that the coolant level on my 2005 BMW 525i is getting low, I have to add water or coolant 1 quart every one or 2 weeks. Driving seems OK, it sounds like there is a leak somewhere with coolant. Can some one give some clue how to check it is the coolant leaking or something wrong with water pump?

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      07-10-2019, 09:24 PM   #2
jparnes1's Avatar

Drives: 2016 340i, 2012 Z4 35i
Join Date: Jan 2010
Location: NY

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Go to an auto parts store that rents out tools and borrow a pressure testing unit. It gets attached to the expansion tank. Pressurize the system and look for a leak. There is also a fluorescent dye you can add to the coolant and then use a black light to look for the leak.
2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus.

2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
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