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      05-05-2015, 02:14 AM   #40
Pierre Louis
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Drives: 2016 535d
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Quote:
Originally Posted by brando1985 View Post
I appreciate your input, but question your hypothesis. I'm curious how the quality of diesel contributes to CBU in the intake / intake ports. The fuel never reaches those areas, unless it's implied that increased soot is the bi-product of lessor quality diesel, hence increasing the chances of CBU via EGR?

Further, as we all know, the N54 guys are battling CBU as well. Since those engines don't have to combat soot, one would suspect that while the prevention of EGR is good for our diesels, it's only half the equation. To completely eliminate the chances of CBU of any kind, one needs to eliminate the EGR, and take steps to reduce oil from finding its way into the intake manifold, correct?

Thanks,

Brando
The question remains as to why the majority of 335d engines and other similar engines from VW and Mercedes don't seem to get into problems with CBU while a good but small percentage do. Some of us don't want to eliminate emissions equipment, so it would be nice to know under what conditions the system actually "works" or what to look for as to a mechanical/electronic problems such as excess cylinder blowby or leaky turbos etc.

Cheers,

PL
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