Originally Posted by GregMN

So now it is just a play thing to experiment with.
First, try water injection. I have had success freeing up stuck rings.


Simplest way is to have one person operate the throttle while the other sprays water from a sprayer bottle into the intake. (Don't do it this way with a turbo engine, the water droplets can pit the turbo blades.) Run the engine at 3000 rpm while spraying water. Lots of water mist, not a garden hose stream, you don't want hydro lock, but seeing steam out the exhaust is good. Use this method only if you cannot do the following method.


Second simplest way is using the windshield washer system to pump the water into the intake air stream. You can source a spray nozzle. I just used a small diameter soft copper pipe that I smash down enough to be a nozzle. Make a separate power source for the washer pump with a switch that you can operate while driving. I have found the best results are when I can put the engine under load, up a long incline, at about 3000 rpm ( what ever your car is at 55 to 60 mph ) . Start by running the pump for about 15 seconds at a time. If the motor loses power, you have gone too long. I ran 4 gallons through a motor over 90 miles.


So, run a lot of water through it and see what you got. Nothing to lose at this point. Almost no cost to try this.

Water Injection for cleaning