08-31-2012, 07:02 AM
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Officially Welcomed to the 'Fest
Location: Murland
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Join Date: Jan 2011
Posts: 701
Mein Auto: '11 335d
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Quote:
Originally Posted by 62Lincoln
When I had my recall performed, I got the SA to print a copy of the Technical Service bulletin for me (not sure if he was supposed to, so no names to protect the innocent). This quote might help the discussion:
"Under certain driving conditions, the High-pressure (HP) EGR valve may become restricted with excessive soot. This restriction impedes the emissions performance of the HP EGR valve."
and
"An optimized EGR valve has been develped to limit this soot buildup."
Interesting that what BMW wrote seems to be contradicted by what TDIwyse is finding.
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Good stuff Joseph; first time I've seen something from BMW that specifically states the reason for ther recall. Although I find it interesting they only mention soot build-up as it relates to the EGR valve. 
I wonder what impact this partially restricted EGR vavle had on soot build-up in the combustion chamber and more specifically the build-up that some members stated lead to the replacement of the heads in several cars.
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