<VV> Decarbonizing Cylinders

[henry kaczmarek]

There's a couple of ways to do it that don't involve water, which if not done properly can bugger up the engine. 

GM Goodwrench Top End Engine Cleaner----Spray it down the spark plug holes and let it sit for 24 hours.  Put the plugs back in and fire it up, goosing the throttle while spraying more  down the carburetors.   Engine will smoke like a coal burning locomotive, but it will take the carbon out. 

You can also use Seafoam engine cleaner or pourable GM Top End Cleaner through a source of manifold vacuum , dribbling it in to the hose, and you'll get the same effect.   

Water is cheaper, but Top End Cleaner doesn't ruin your engine if you put in too much. 

Hank