Re: repairing diesel engine on the dry
Putting a hose onto the intake will work, as long as you do not leave it running pressured with the motor off. If you do, you will fill up the exhaust system and at least one of the cylinders with water, and possibly the sump too.
The bucket is a better idea, really. Have a friend use the hose to keep the bucket topped up. Don't let the water level in the bucket drop too low, or the cooling system may get air-locked with a slug of air. This tends to happen with an older (and worn) water pump.
Have the friend keep checking that water is coming out of the exhaust.