cleaning coolant overflow bottle/tank

[fxf]

Does anyone know what's the best way to clean the brown sludge out of the bottom of the overflow bottle/tank Thanks, fxf

 

[Westbusa]

Remove the bottle and add some good cleaner and give it a shake,or a long bottle brush might work...

 

[Rocketmn]

You can also use some White Vinegar and Warm water and just let it soak then rinse thouroughly. Depends how bad it is..

 

[fxf]

Thanks, Its bad.. I wasn't sure what cleaner to use. Tried bleach, didn't really work. Will try vinegar.. Thanks for the suggestions...