Quote:
Originally Posted by Mechcanico Lee
Thanks for taking it apart so we can see how it works ....always good to have an understanding how things work
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Thanks matey, will try and go a bit further in tomorrow but was pushed for time. Never seen this waterpump/magnet arrangement so would be interested to see further in. The E28 BMW I had in the 1990s had heat in the cabin all the time the valve block was shocking quality in comparison but was made 30 years ago I suppose.
Mine has done 260,000 miles so can't grumble. The pump runs from idle until 2000 rpm according to Self Study Guide, I can see why, without it that is when the heat output becomes feeble. It also runs with residual heat function and I concur this stopped giving heat for more than 30 seconds.
The pump will also pull enough warm water on a winter's morningto pre heat the cabin, but only if the Aux heater is turned on manually via holding ON/OFF on climate panel to make it come on without ignition and selecting HI + HI on temps. If making the AUX heater come on via the timer menu (activated via VCDS) then this pump does not come on and no heat is pulled up which is a shame. I have the extra pump V55? to fit to the Webasto but will probably never get around to getting the other parts and fitting it.