Quote:
Originally Posted by paramax55
Did you see the pictures? The e53 uses an external heat exchanger. There is about a 1/2" hole that will dump the coolant out as fast as you pour it in if you don't seal it up.
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Again, as someone who just went thru the same thing, those plugs need to to hold coolant. IMO it was not a trivial task to plug them in a reliable way.