Coolant passage cleaning

[Damian]

Whats a good way to clean the coolant passages in the engine without sending the block off to get professionally cleaned?

[Vettezuki]

Whats a good way to clean the coolant passages in the engine without sending the block off to get professionally cleaned?

Pressure washer? I've got one and we live close if you want to borrow it.

[Damian]

I might have to do that here soon. I need it for another car I'll be working on after I'm done with mine.