Several places to look:
- 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.
- 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).
- Numerous coolant hoses coming out of firewall (from/to heater core) behind intake manifold.
- 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
Tension strut bushings
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
Black 2002 BMW 745Li (sold)
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.