Originally Posted by leebermeister
Thanks. Im in the same boat as you with trying to diagnose a pinging type sound between 2 to 3,000 RPM and have been reading a lot about the prior gen DISA issues. Im thinking of pulling mine this weekend to see if any flaps appeared loose, but now discouraged with how different ours are to the prior gen.
Well, at this moment I am thinking about DIY replacing DISA motor 1 and see how it goes, and then later on replace DISA motor 2 (intake manifold needs to come off and gasket set has to be replaced when refitting). Depending on how my weekend goes, I am thinking of removing DISA 1 to have a look at it - maybe the flap has an obvious sign of being loose or prone to rattle that will confirm this for me.
There is a great DIY here: DISA Removal and Maintenance - N52 Engine (Pic Heavy)