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Old 11-27-2011, 08:44 PM
Keif Keif is offline
Master Tinkerer
Location: Houston, TX
Join Date: Mar 2008
Posts: 2,213
Mein Auto: 2007 Alpina B7
Several places to look:
  1. Vent hoses (small) on the inner part of each head, just below and to the left and right of the throttle body / intake manifold opening...these meet and go to a single hose that runs to the coolant reservoir. Mine were leaking where they were clamped to the heads.
  2. Metal coolant pipe running from back of water pump meets a rubber hose at the back of the intake manifold (either the hose, or a bad metal pipe-to-rubber hose connection).
  3. Numerous coolant hoses coming out of firewall (from/to heater core) behind intake manifold.
  4. Valley pan gasket (thin rubber gasket that goes around metal plate that covers coolant feed pipe)...a leak from here also means that the O-ring at the front of the coolant feed pipe is going bad and water will - or should be - coming out of the weep hole.
Black 2007 Alpina B7
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White 2007 Alpina B7
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KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 11-27-2011 at 08:48 PM.
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