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post #8 of (permalink) Old 01-12-2013, 10:10 PM
Lord Vader
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Woah, you drilled a hole in the top of the thermostat? Your gonna need to replace that now.

One thing i can think of, is the plastic lip for the hose on the radiator becomes brittle over time and can crack. Inspect this. Broken peices of plastic *could* be the reason the heater hose is potentially clogged. If its broken it will require replacement of the radiator.

Here is also a good DIY on the heater valve: Pelican Technical Article: BMW Heater Valve Cleaning/Flushing - Alberta based BMW Community
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