1999 GMC Suburban V8 Four Wheel Drive Automatic 120, 00 miles
I have a problem with my radiator/cooling system. I have done this procedure three times. Drain radiator, put cleaner solution & clean water in radiator, and run for 15-30 minutes per instructio9ns. Then drained, refilled system with fresh water, & run again for 15-30 minutes, drained. Then set up system to back flush, and performed this procedure for a minimum 30 minutes while thermostat open & closed, while draining fluid into a 30 gl can until clear. Then filled system with anti-freeze & water to specified levels. MY PROBLEM IS THAT I HAVE PERFORMED THIS PROCEDURE 3 TIMES WITHIN A 72 HOUR PERIOD, WHILE PUTTING A MINIMAL AMOUNT OF TIME RUNNING ( 2 HOURS) ENGINE. I STILL GET A CHALKY GRAVY COLORED FLUID IN THE RADIATOR. THIS IS A GM VEHICLE THAT HAD THE DEX-COTE TABLET PUT IN AT ASSEMBLY THAT WAS SUPPOSED TO LAST 150,000 MILES. IT SEEMS TO ME THAT, I9S IT POSSIBLE FOR SOME TYPE OF OIL TO BE LEAKING INTO THE RADIATOR? I DO NOT WANT TO DRIVE VEHICLE UNTIL I KNOW THE SOURCE OF THIS PROBLEM. I AM TOTALLY STUMPED. THE VEHICLE DOES NOT SEEM TO BE RUNNING HOT, THERE SEEMS TO BE A VERY SMALL LEAK SOMEWHERE AS I HAVE HAD TO PUT IN A CUP OR TWO OF ANTI-FREEZE. I ALSO FILLED UP THE OVERFLOW TANK TO PROPER LEVEL, & IT APPEARS THAT THIS SAME OIL GLOBULATED MIXTURE IS IN THE OVERFLOW TANK NOW ALSO. WHAT AM I MISSING?
Friday, January 29th, 2010 AT 4:18 PM