Are you absolutely positive it isn't coming from the bottom of the water pump housing?? IMHO it is nearly impossible to tell exactly where it is coming from since the bottom water pump housing bolts are behind the crank pulley, unless you have the engine out and you can move around it easily. Money is on water pump housing...

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth