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      11-04-2012, 02:04 AM   #11
Dackelone
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Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

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In the past, the life of a traditional water pumps had a lot to do with how good the bearing inside of the pump was(that the factory produced) and how "tight" the mechanic installed the belt. Some pumps would fail early and some would go 100K miles!

BMW's have always had weak cooling systems. Meaning water pumps needing replacement every 60K and new radiators at 90K miles and you should probably replace your hoses at that point too. On the older six cylinder cars replacing the water pump was sooo easy. Not so on today's BMW's.

Ticher and United both sell an electric water pump kit for the 135i. I think it runs around $700 for both the pump and thermostat. That's a pretty decent price. Way down for the $1.600 price just last year!
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