Volvo KAD 42 Coolant - potentially dumb question

[BruceK]

I had to drain both engines to get the oil coolers out.

Where as the owners manual is full of info on draining the system it's a bit pauce on refilling it so...

Question 1 - For the fresh water & antifreeze coolant, when filling up is there a air bleed bolt / valve that needs to be loosened. How do I go about checking that there is no air locks? What rough capacity (for a 50-50 premix).

Question 2 - Raw water coolant. Does this need to be topped up and if so from where, or any other procedure i.e. to avoid impeller damage (the impeller sits about a foot above the water line). Do I need to check for any air locks here?

 

[spannerman]

There is no airbleed screw as its selfbleeding, it takes about 19 ltrs to fill the system, it might need a top up after the first run up to operating temp and the thermostat has opened.
Just unscrew the seawater filter cover and fill with water to prime the impellor.

 

[BruceK]

Great. Simples. Thank you :encouragement:

 

[novanta]

Just fill the coolant very slowly so the air can escape while youre filling. I always loosen up the banjobolt on the thermostat housing ,17mm, to get all the air out.