Question about 1991 Cadillac DeVille
There should be 2 rubber hoses going into the firewall and into the car. If factory they will have spring clamps just like on the radiator hose. Remove both lines. Then get a hose and put it in one line and run the water until it comes out clear. Then do the same thing with the other side. Do this a couple of times. Then reconnect the 2 hoses and check the level of the radiator. Then start the car with the radiator cap off and wait a while for the thermostat to open and have the heater on so it will cycle through the whole system. Then top off as needed. Hope this helped Tim
Posted on Nov 13, 2010
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Posted on Jan 02, 2017
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