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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 02-09-2012, 10:19 AM
swiftiga swiftiga is offline
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Location: Florida USA
 
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Mein Auto: Z4 Coupe, 128i
Oil leak

08 Z4 coupe I see a clear oil on the floor in line with the front of the door too clean to be engine oil does not look like trans fluid any idea?
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Old 02-09-2012, 10:36 AM
wifesauto wifesauto is offline
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Mein Auto: sloporsche
put the car on a lift and check for oil leak
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  #3  
Old 02-09-2012, 06:01 PM
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crewdog843 crewdog843 is offline
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Mein Auto: '08 Z4 3.0si Roadie
Hydraulic line leak. BMW is notorious for its hydraulic leaks. On my 7 series, over the course of five years, I replaced mine three times. If it's clear or slightly yellowish, it might be a leak in your hydraulic reservoir.

jake
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Old 02-10-2012, 07:12 AM
swiftiga swiftiga is offline
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Mein Auto: Z4 Coupe, 128i
Jake, you may be correct what is this fluid for? I will not be able to look under the car till next week my garage space is in use.
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Old 02-10-2012, 02:28 PM
Jax5 Jax5 is offline
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Mein Auto: Z4 Coupe 2007
Based on the location of the leak on the floor, the color of the fluid, and the age of your vehicle it matches my car's recent leak.

BMW repaired it under warranty and said it was the Mechatronic sleeve (?spelling?). There are other posts on BMW forums about this type of leak. It's some gasket in the thing that goes bad. Search mechatronic for more info.
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Old 02-10-2012, 04:41 PM
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shipkiller shipkiller is offline
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Mein Auto: Me
If you don't have a valve cover leak, then there are two other areas for leaks. One has already been mentioned: A hose for the power steering. Another area is the Constant Pressure Valve (CPV) on the back of the engine. This is also a somewhat high failure item on the S54 engine.
A CPV valve is an easy replacement.
Item 10: http://www.realoem.com/bmw/showparts...88&hg=11&fg=10
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