Valves on C7
Thread Starter
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Joined: Jan 2017
Posts: 187
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From: Winchester, VA
Valves on C7
I have heard numerous stories of cars with direct fuel injection needing to have valves cleaned (and pretty expensive) due to the residue build-up since the valves do not get cleaned during fuel delivery as in port injection.
Since Vettes utilize direct injection, I was wondering if this is a problem that some owners have experienced or not. Chevy recommends use of top tier fuel, which I have been in the habit of buying, but am wondering if there is anything else I could/should do to prevent/remove build-up. I have not read any posts regarding this issue, so I am wondering if this is really something to be concerned about or not.
Any constructive inputs will be appreciated.
Regards,
TwoVettes6916
~Keep the Wave~
Since Vettes utilize direct injection, I was wondering if this is a problem that some owners have experienced or not. Chevy recommends use of top tier fuel, which I have been in the habit of buying, but am wondering if there is anything else I could/should do to prevent/remove build-up. I have not read any posts regarding this issue, so I am wondering if this is really something to be concerned about or not.
Any constructive inputs will be appreciated.
Regards,
TwoVettes6916
~Keep the Wave~
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Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
It can be an issue but so far there has not been rampant problems with the valves coking without being washed by the gas going into the cylinders. People have opened up the intakes and found very little issue with the valve stems.
At least, that's what I've read on here.
Elmer
At least, that's what I've read on here.
Elmer
Tech Contributor
Joined: Oct 1999
Posts: 41,037
Likes: 9,801
From: Charlotte, NC (formerly Endicott, NY)
GM has put over a million cars on the road that have Direct Injection since 2007. Very few valve issues have been noted with those engines. Other issues such as broken timing chains on the V6 engines but no valve coking issues. Even on the brands that had problems they usually didn't start affecting performance until the vehicle had well over 60K miles on it.
Bill
Bill
