Quote:
Originally Posted by msbc721
You mention rough idle, the famous n52 cold engine shake, or more severe ?
What gas are you running ?
Oil type and how frequent ? Vanos solenoids can get clogged making the situation worse
Don't buy into their fuel injector service, especially at that price..Go to your local parts store, advanced,autozone, whatever and get a can of "Seafoam" throw it in your gas tank, call it a day..
Ticking and knocking are different sounds, knocking is a big big big no no..N52 can develop a slight ticking, you already had your head replaced once which is the fix according to BMW, how often is the car driven ?
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I run shell 93 most of the time. The sound is similar to the ticking was, but more muted. Oil was changed according to the CBS I'm guessing until I bought the car as a CPO with 37k on it, since then I have changed it every ~7500. It has 70k miles on it now. I just changed the oil like 2k ago and prior to that I run a bottle of techron through it with a full tank. I do this about once a year. What is the "the famous n52 cold engine shake"? Is that a normal thing?