It would have been easier to just check the coolant level occasionally.Ĭhecking the coolant recovery bottle is a good way to do it for routine look sees but it is a good idea to pop the pressure cap off occasionally when the system is cold and check the radiator level, too. so.the system would not pressurize and would overheat. The mud from the rust accumulation would build up in the pressure cap fitting and unseat the presure cap seal. The problem compounded itself over time on some vehicles that were run in a chronic low state. It just doesn't tolerate the system running low as well as some of the silicated coolants.
#Dex cool coolant canadian tire full#
Just keep the system full and DexCool is great stuff. If the system runs low long enough it will accumulate enough rust to actually get muddy. The red sludge you describe with DexCool is simply rust. The surface drys again, rusts and another slug of coolant comes along and washes the rust off. Then along comes a slug of coolant and washes the rust off. When the system runs low on coolant, areas of the head will loose coolant and the inner surface of the coolant passage will almost instantly dry out due to the heat and haze over with red surface rust. With DexCool, the surface is very well protected as long as it is wet with the coolant. Where silicated coolants "plated" the inner surfaces of the cooling system and passages in the block and heads and provided some level of corrosion protection when the surface would dry out due to low coolant levels. "The problem that people experience with DexCool is in engines with cast iron heads (like the 4.3) when the systems run low. From a GM engineer who was on BITOG, but left when he got tired of the abuse.
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