My 2001 GMC Sierra 1500 coolant reservoir tank is very dirty. There is scum on the sides and sediment on the bottom. The reservoir tank has baffles so it is almost impossible to get a brush inside to scrub it out. I tried soaking the tank with radiator cleaner, but that didn't work. I also tried Super Clean and Vinegar. Nothing worked.
I had Dexcool in it for 7 years (changed 3 times). I switched over to Prestone LowTox 2 years ago. When I switched over I did a thorough cleaning with heavy duty cleaner and several distilled water flushes. The scum was in there before I switched to LowTox.
I just don't like looking at the dirty tank. It makes me think the entire cooling system is dirty.
I had Dexcool in it for 7 years (changed 3 times). I switched over to Prestone LowTox 2 years ago. When I switched over I did a thorough cleaning with heavy duty cleaner and several distilled water flushes. The scum was in there before I switched to LowTox.
I just don't like looking at the dirty tank. It makes me think the entire cooling system is dirty.