Changing coolant on VP KAD 300

[kaik]

Hi, I'm going to change the coolant on Volvo Penta KAD 300 and hope for some tips about draining the engines.
The motor room is so tight that I have problems locating the drain plugs described in the manual. The manual is also for different models so I hope someone can verify this plugs or upload a picture or describe where they are.
On my engines I have problems locating plug 3 and 4 in the picture. Howewer I have a drain tap on the rear on exhaust manifoil.

Thank you.

 

[alt]

I just drain 1 & 2. I know there'll be some (not much) coolant left behind but as I change it annually it doesn't bother me.

For the sake of 'wasting' some distilled water, I then top up with just distilled water and run up to temp (go for a spin) and then empty it. This 'flushes' the system.

Finally, fill up with 50/50 distilled water/coolant (maybe 55/50 in favour of coolant as there'll most likely be some distilled water still in the system as i've only drained 1 & 2)

Been doing this for 10+ years and never had an issue. You'd want to see the state of some engines i've drained (so bad i just had to do an initial flush with tap water... hose in the expansion tank and leave the drains open to drain out all the carp)

 

[volvopaul]

Drain at no 2 and the dedicated drain tube sited rh side of engine , not the one with the blue cable tie the other one , you will drain majority of engine from the two points .

 

[kaik]

Thank you for your help. This will certainly save me much time and trouble.

 

[Portofino]

Any body have any issues with using a pump to pump out as much as poss from expansion tank and where else you can suck .
Then refil .Do this annually as opposed until its time 5 y or what ever is up .
Basically refreshing with new and diluting last years over and over agian .
Keeping the corrosion concentration right in theory ?