I bought my 2005 535d last week. I was having temperature issues, so I replaced the main and EGR thermostats today and the temperature is fixed!
Next I had to replace the 4th glow plug, so I removed the intake. Unfortunately, there is a lot of oil everywhere under the intake. Also, the inside of the intake is also very dirty. As well as still having swirl flaps...
Any ideas what this leak could be? Looks like a lot is around the middle pipe under the intake (2nd picture), but hard to know...
Here are some pictures:
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Any ideas? Perhaps a common problem? I haven't been able to find much.
Dankje,
Robert