Re: Flushing/internally cleaning an engine
I am not aware of anything that is <span style="font-weight: bold">safe</span> short of disassembly. Any foreign substance you introduce will have to be somewhat solvent based. You run the risk of causing damage to seals and gaskets. Just not worth it.
You can get <span style="font-weight: bold">most</span> of it by pulling the valve covers and oil pan. Nasty job.
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