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Cleaning Excessive Carbon from Sticking Valves


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http://sandyblogs.com/techlink/?p=6659

 

Summery:

"2000-2015 GM passenger cars and light-duty trucks equipped with gasoline engines that experience engine misfire, rough idle, extended crank or crank/no start conditions may be the result of major carbon build-up on the intake and/or exhaust valves. One or more misfire DTCs may be stored in the Engine Control Module (ECM). Excessive carbon build-up on the intake and exhaust valves is often due to fuel contamination or incomplete burning of the fuel."

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When I clicked the link on the OP, it redirected me to another site and a recording came on telling me I had a virus and to call the phone number to get the virus removed.

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blah blah blah blah or you could just use a can-o-seafoam once a year or every other year.

Before you go and give some poor advice, google a little info about these GDI motors. Fuel does not get injected over the valves like it did in the previous LS motors.

 

Sea foam won't clean the carbon on the valves. Only effective way is to walnut blast them.

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Or spray through the intake once in while, seafoam or equivalent cleaner if worried about it.

 

Before you go and give some poor advice, google a little info about these GDI motors. Fuel does not get injected over the valves like it did in the previous LS motors.

 

Sea foam won't clean the carbon on the valves. Only effective way is to walnut blast them.

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Before you go and give some poor advice, google a little info about these GDI motors. Fuel does not get injected over the valves like it did in the previous LS motors.

 

Sea foam won't clean the carbon on the valves. Only effective way is to walnut blast them.

 

Why wouldn't if you introduce to intake/plenum through PCV valve?

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Why wouldn't if you introduce to intake/plenum through PCV valve?

 

Because he is not very smart. There are multiple ways to introduce sea foam (or other cleaners) through the intake and pass over the valves. The most effective way is walnut (or other debris) blasting, but a powerful chemical to break down the deposits can be fairly effective as well.

 

Tyler

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I would and do go with chemicals like sea foam through intake before oil changes. I put some in the tank and oil also. Other walnuts or debris would make me a little nervous, but I guess it tried and true. Worked so far in my first DI engine for 5 years and 75k miles.

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Like I said, walnut blasting is the only effective way to clean the valves. Sea foam won't clean them like the blasting will. Check out a lot of sites with the BMW's and audis that have GDI motors where sea foam doesn't do anything to the valves but the blasting will. There's pictures too.

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Like I said, walnut blasting is the only effective way to clean the valves. Sea foam won't clean them like the blasting will. Check out a lot of sites with the BMW's and audis that have GDI motors where sea foam doesn't do anything to the valves but the blasting will. There's pictures too.

I'm not debating walnut blasting would be more effective than seafoam on removing heavy carbon deposits on intake valves, what I'm stating is that seafoam or similar would still remove a good bit of the buildup, and if you began using a seafoam treatment in regular intervals on your DI engine from new....well then maybe you'd never have to worry about walnut blasting to begin w/ eh? :driving:

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