Access for treatments

Asked by Jason Mar 02, 2020 at 03:52 PM about the 2003 Cadillac DeVille DTS Sedan FWD

Question type: General

I have an old Street DeVille I have no
radiator cap South Shore flush systems or
treatments for leaks should I put it in my
overflow tank or am I completely missing
something in this is a very stupid question

1 Answer

26,125

I will assume you are trying to flush the cooling system. First, go buy a radiator cap. Then, the treatment liquid is poured into the radiator via the cap opening. Once it is in, put the cap on and let the car come up to temp (unless the fluid container you bought says different). After following directions on the bottle, you will drain the cooling system and fill back with a 50/50 water to antifreeze mixture and secure the cap. THIS IS FOR RADIATOR TREATMENT - NOT ENGINE OIL OR ANY OTHER FLUID!!!

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