Quote:
Originally Posted by n2djazz
Thanks for posting what service tech said. Nowadays we all have to be smart about our car's maintenance. Totally agree re cleaning may be under the guidance of BMW HQ. If it's covered under warranty, I'd let them do it. If it wasn't, I'd do it once and observe the outcome. And, of course, I'd post my experience (mistake or otherwise) for all to learn.
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Hmm the trouble I have with this method is that they have stated it may require a few attempts to fully clear, and also one has no way of 'seeing' if the valves are clean whereas with walnut blasting you can physically see the valves...
So yeah I think I would rather do the walnut blasting myself personally...