Quote:
Originally Posted by FlyByGTI
I guess that would make sense. I didn't really know about the truck aspect of it, but was thinking about it from the point of view of smaller diesels (ie. Golf TDI).
Never owned a diesel so I don't really have a huge abundance of knowledge with them.
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Im just curious as to what causes this to be an issue here but yet you can have a diesel with 500K miles and the valves will look ok (not good, but not coated like that picture by any means). Maybe there ports are designed in such a way to speed up the air entering the cylinder so that the air moves much faster around the valve? I know for a fact that the EGR systems on a diesel are way way more messy than that of a gas engine. All that soot goes into the intake tract. If you could find the difference between the two I think you would be well on your way to a solution. For all we know it could even just be a special coating on the valves.