Garrett I think that's the ticket. I think the pressure bleeder I'm using is part the culprit (Motiv). When I get it back, I'll try using it to pressurize only, not pressurize AND fill. So what I'll do is fill reservoir full, then pressurize, then bleed a corner, release pressure, fill, add pressure, bleed - and repeat until that corner is good. I won't rely on the bleeder to maintain the level as I suspect it introduces bubbles when you fill it with fluid and/or pressurize it.

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Daily Drivers:
- 2008 535i, 320,000km
- 2004 X5 4.4, 01/2004 production, 420,000km
- 1997 328i, 350,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2013 Ski-Doo MXZ X 800 E-TEC, trail can
- 2007 Ski-Doo MXZ Blizzard 800 HO
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E