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+--- Thread: Draining closed cooling system (/showthread.php?tid=7764)
Draining closed cooling system - Toughship - 07-16-2021
Have 7.4 Crusaders and want to replace the coolant in the closed cooling system and was wondering if the old coolant can be removed with a shop vacuum?
Prefer to follow the manual and open the appropriate drain plugs but I cannot reach all of them , plus the boat is in the water and don’t want to drain the old antifreeze into the bilge.
RE: Draining closed cooling system - TiaraTom - 06-29-2023
I just did exactly this. Could not/did not access anything unreachable like outer drain plug and hoses. I followed the instructions in the manual otherwise. In some cases I was able to catch with a small bucket. In other cases I was able to feed right into running wet shop vac. The rest drained into bilge. I then wet shop vac'ed that. Hosed everything down afterwards and shop vac'ed that too. All into 5 gallon buckets with lids.