Quote:
Originally Posted by mikeSS
I do think these DI engines have valve coking problem.
BUT people have to realize the new GM LT1 specially is not as bad as pass DI engines. Vendors love to post pictures of major valve coking of other engines. the picture above that elite posted of a valve with 5k miles isnt a LT1 engine. in fact if all engines were that bad at 5k miles, companies would loss money in warranty work.
Heres the latest we have discovered on the corvette forum.
37k miles LT1 engine. Some coking, not major coking.
http://www.corvetteforum.com/forums/...or-test-4.html
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Right. In my experience turbo motors have the biggest problem with it. But then it usually doesn't show real symptoms (depending on your driving style) until late or after the warranties expire. So not directly impacting the OEMs.
Based on the pics of that LT1, seems by 60k miles things will be definitely impacting fuel economy and power.
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