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Question:

Where to the water pump o-rings go on a bmw 745LI?

I am replacing the water pump and want to know exactly where the two o-rings go

Answer:

There are several rubber seals on a water pump. The biggest irregular shaped seal is obviously for the main portion of the pump (this can not be misinterpreted for something else). The next in size is the o-ring for the thermostat. And 2 additional O-rings (one smaller than the other) are for the return pipes. While removing/pulling out the pump, take care that the pipes do not get pulled outward by the pump. And when putting in the pump just gingerly align the pipes to the holes in the pump and you are good to go.

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