Is it necessary? Some engines do just fine with them never being touched.
Carboned Intake Valves
- Thread starter Al
- Start date
CRC doesn't do much, you need mechanical scrubbing. If you can't walnut blast, I heard scrubbing by hand with some nylon tool (i.e. zip tie on a stick) might redneck enough carbon out.
The only ones that seems to do ok without dual injection are the ones keeping the intake values at 400C to burn those carbon off (i.e. Skyactiv G). Think of it as self cleaning oven temperature.
Dry ice is not needed if you are not worried about a bit of walnut residue like engine. Usually after walnut blasting they spray compress air and vacuum out the remaining media anyways. It is not sand and any tiny amount remaining would just burn up. I have seen people dry ice blast industrial equipment that can't tolerate any residue, but not engine.
The only ones that seems to do ok without dual injection are the ones keeping the intake values at 400C to burn those carbon off (i.e. Skyactiv G). Think of it as self cleaning oven temperature.
Dry ice is not needed if you are not worried about a bit of walnut residue like engine. Usually after walnut blasting they spray compress air and vacuum out the remaining media anyways. It is not sand and any tiny amount remaining would just burn up. I have seen people dry ice blast industrial equipment that can't tolerate any residue, but not engine.
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