Since these cars are direct injection do they require at a certain point walnut blasting?
We hope not!Since these cars are direct injection do they require at a certain point walnut blasting?
Lot's of people use SeaFoam for this these days. Not sure if there are an ramifications in using it if for a turbo engine though.GM used to make a product called Upper Engine Cleaner (??). It was a liquid that we would trickle into the carburetor throat while the engine was running, or suction into the intake manifold
The GM elixir was SeaFoam X2.Lot's of people use SeaFoam for this these days. Not sure if there are an ramifications in using it if for a turbo engine though.
I did the same with a 1971 Oldsmobile Vista Cruiser Rocket 350, and others. Trickle in water through the carburetor while running.When I got my license my first car was a Mustang. My dads friend across the street was a Ford mechanic, helped me rebuild and replace various parts he found sub par. He cleaned the carbon buildup in the engine by dumping a gallon of water down the carb while running. Should have seen all of the steam and junk coming out of the exhaust!
My 2011 Audi S5 with the 4.2 V8 has over 90K miles on it, I have not had to do any carbon buildup cleaning, though it probably could use it by now.
Eric, I agree. I would think that newer engines would manage the oil vapor and crank case ventilation better than they do. Introducing it into the combustion chamber for burning through CCVs and plastic tubes and manifolds onto the valve heads is certainly creating some problems for some manufactures. Usually higher mileage engines that are using lower and lower tension piston rings to eek out a bit more miles per gallon. Like my BMWs.Reminder to self to dig up a photo of the intake manifold off of a V10 Audi motor. The intake passages were severely restricted due to carbon buildup over 80k miles.
One would think the direct injection engineering of the PCV systems would be far advanced by this point. Some sort of "filter" and catch-can combo seems to be the way to stop the oil vapor (wet) from making its way back into the intake.
The issue of carbon build-up in direct injection motors stems from the injectors being below the valves. In the old-school injector configurations, the injectors sprayed down onto the tops of the valves and offered a cleaning process.