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05-18-2010, 11:13 PM | #1 |
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leaky valve cover?
So just recently i bought myself a 2003 2.5 knowing it needed a few fixes. I know it has a slight oil leak which i believe is due to a leaky valve cover gasket. Has anyone had this problem before? I just want to double check with some more experienced z owners before i go tinkering with it.
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05-19-2010, 07:24 AM | #2 |
Certified Adrenaline Junkie
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On the M54 engine at that age, it could also be the oil separater aka Crank Case Vent (CCV) aka hooter valve. How many miles does the car have?
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05-19-2010, 09:21 AM | #4 | |
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easy way to tell is pull your coils and see if there is oil on them (if you cant tell from around the valve cover). Last edited by nickpapa; 05-19-2010 at 09:28 AM.. |
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05-19-2010, 09:44 AM | #6 |
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Remove the plastic "BMW logo" cover on top of the engine and you will see the coils. There are no spark plug wires. The coils actually connect directly to the spark plugs. 2 10 mm bolts each. Don't over torque them when replacing and it is a good idea to keep them in the same order when reinstalling.
The valve cover gasket goes around each spark plug hole and if you see oil, it is leaking into the plug holes and most likely other places. |
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05-19-2010, 10:07 AM | #7 | |
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Quote:
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05-19-2010, 07:30 PM | #9 |
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Drives: ESS/G-Power Z4M, VF Z4, 996tt
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The valve cover gasket is a common replacement at that age. I had mine done at ~90k miles. Here's a DIY to get down to the plugs (easy I know, but just in case):
http://www.linquist.net/motorsports/bmw/plugs |
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05-19-2010, 08:09 PM | #10 |
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05-19-2010, 09:02 PM | #11 |
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Drives: 2008 Space Gray Z4MC
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2003 BMW Z4 roadster
Manufacturer BMW Also called Land Shark Production 2002–2008 Assembly Spartanburg, United States Class Luxury Car-Sports Car-Roadster Body style(s) 2-door roadster 2-door coupé Layout FMR layout Engine(s) 2.0 L N46B20 I4 2.2 L M54B22 I6 2.5 L M54B25 I6- <-------------Your 2.5 liter engine here 3.0 L M54B30 I6 3.0 L N52B30 I6 3.2 L S54B32 I6 Transmission(s) 5/6 speed manual 5/6 speed automatic Wheelbase 2,495 mm (98.2 in) Length 4,090 mm (161.0 in) Width 1,780 mm (70.1 in) Height 1,300 mm (51.2 in) (roadster) 1,285 mm (50.6 in) (coupe) http://www.bmwz4roadster.net/bmw_z4_engines.htm
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2008 Space Grey M Coupe-Euro headers-RPI Scoop-Gruppe M CAI-Eisenmann Race Cans-RE X-pipe-ECU Remap with O2 and EGT delete-H&R Sport springs-Zeck CDV delete-Stock Gloss black powder coated wheels-LED Tekarbon Angel Eyes Project-Michelin Super Sports-Hardwired Uniden R7-H&R front and rear spacers-Alarm module added-stereo amp recoded to vert spec settings |
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05-22-2010, 04:04 PM | #12 |
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alright so everything is done. It took me about an hour and a half to complete the entire thing (should have made a DIY). As soon as i took the valve cover off i could see where the leak was coming from by the oil stains on the side of the motor. So hopefully this fixed my problems......as far as the leakage goes :/
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oil leak, valve gasket |
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