In this episode we show you how to replace radiator (cooling) expansion tank in BMW Z4 (E85).Remember that you should never open cooling system while the eng To check oil level press the right button on the dash with the engine running! andrewr. Member. Posts: 578. Joined: Sun Mar 07, 2010 12:38 pm. by andrewr » Tue Sep 09, 2014 6:07 pm. The n52 engine in the facelift has no dipstick, just a digital readout on the dash. The pre facelift engines have dipsticks though. Save these and use them to plug the pump you removed. On the hydraulic line mating to the lift cylinder, there's a small o-ring that sits in the hole the line plugs into. Be very careful when you remove the hose fitting from the lift cylinder that the o-ring doesn't come out with it and get lost. __________________. Top Down 365. Z4 water pump replacement (e85, m54) OK..here is how you really change the water pump on a Z4.(E85, m54 motor, mine is a 2.5) I have done this procedure, and all you will need are one water pump with o-ring, two m6x25mm bolts, a gallon of anti-freeze, simple hand tools, a few blocks of wood, a rolling floor jack, and jack stands. E85 / E86Model Year: 2002 - 2008. ZPOST > BMW Z4 Forum (E89) > 2009-Current Z4 Forum I try to change the differential oil, but e89 is kinda different from e9x Our top-rated products that suit BMW Z4 Roadster (E85) 2.0 i Petrol 150 hp best are: Engine Oil COMMA Prolife 5W-30, 5l, Synthetic Oil. Engine Oil LIQUI MOLY МoS2, Leichtlauf 10W-40, 5l, Part Synthetic Oil. Engine Oil LIQUI MOLY Leichtlauf, High Tech 5W-40, 5l, Synthetic Oil. Engine Oil LIQUI MOLY Top Tec, 4600 5W-30, 5l. by Yamiuchi » Thu Dec 08, 2011 4:15 pm. Hi all, Had a random thing happen twice now, a couple of times when I have driven the car, I park up and when I switch of the engine, the oil warning light comes on. Have had it on short and longer journeys, have had a mate plug into the car and showing no errors. This is when the car is turned off Looked around on how to reset the change and found how to. - Iginition OFF (POS 0) - Press and Hold the trip odometer button while turning key to Position 1 (Accessory) - Keep the button depressed (about 5 seconds) until you see 'Oil Service' or 'Inspection' with 'Reset' or 'Re' in the display. - Press the button again and the display will Halv3r.