[Rockter]

harp :

There will be plenty in the exhaust and gearbox, but it is difficult to get any into the motor if the thermostat is shut, and even when it opens, it does not open for long, hence the need? to drain the system.

It might be possible to run the anti freeze in a bail-and-bucket loop, with the motor under load. Put the cooland intake into a bucket of the brew, and catch the spent exhaust water in another bucket. Then use a bailer to transfer the spent brew from the exhaust bucket to the intake bucket.

That's likely to be a bit of a chore, and exhaust gases will be in your face together with that toxic anti-freze. It really is toxic stuff.

Keep cats away from it. It's sweet to them, and they get poisoned.

It's easier to drain it, methinks.