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Old 04-29-2008, 04:57 PM
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pizzachef pizzachef is offline
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Join Date: Jan 2007
Location: New Cumberland, PA
Posts: 833
Well, I'm glad you got your air bubble out...for next time, you can use a garden hose to push water in one end of the system and out the other, then quickly connect both ends (usually easier with a helper ) That helps, but driving is definitely easier if its already all hooked up.

As to where your return goes, I have mine upstream of the aux pump (I don't think that is between the aux and main water pumps), and I have the aux pump connected to keyed-on power, so it runs whenever the car is on. It helps get the coolant circulating when you're at idle. If you're not going to re-wire the aux pump, then its probably better to return your coolant to the downstream side of the pump so it doesn't inhibit the flow when its off.
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1985 300TD-euro 352,000 mi
1974 240D (1?)52,000 mi - has a new home now
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