[C320-list] Change coolant 200 hours on engine

[Jeff Smith]

Dan,

Which engine and which pump, raw water or coolant? I assume coolant. The M30 had a drain on the left side of the engine looking from the front. I would simply drain the coolant and refill while replacing the pump. On a car I would never change the coolant just to change the coolant again when you break the water pump loose.

I would have spare hoses and clamps on hand, though.

Others may have different thoughts.

Jeff
‘94, #121

Sent from a TRS80 computer

> On Sep 23, 2020, at 10:05 AM, danb70341 at gmail.com wrote:
> 
> 
> I am replacing the water pump and was told to change the coolant first since it’s been some time from previous change and to use the defective water pump until process completed. I believe there are 4 qts of coolant in system and two drain plugs one for block other heat exchanger. Not sure on water heater. I will drain run fresh water through while slowly running engine then close plugs and add new coolant/antifreezes.  Is this process correct from those who have experienced the change?
> Thanks for insights
> Dan Bochniak
> 
> Tranquility 1995 #250
> 
> Sent from my iPad