Originally Posted by HPF Chris

We often see M3's with the typical Vanos tick. The ticking generally subsides after about 10-20 seconds upon startup. If it doesn't, most of the time a simple vanos adjustment fixes it which we do automatically on all built motors and on other M3's when people request it. In some cases (which is rare) we will find that the vanos is broken. In these cases we will either replace the broken parts if we have extras or sell the customer a used one from our shop or a new one at their request.

Chris.