My 2000 Bonneville that I drive back and forth to work had had an internal anti-freeze leak for some time. The other day however, I started losing coolant big-time, and all into the cylinders, nothing external. I topped everything off after work on Saturday, and after only 15 miles....had to add TWO gallons of anti-freeze. :damn angry: The car has 250,000 miles, but doen't use any oil, and is in good shape, so I stopped by O'Reilly's Auto Parts, just for kicks, thinking NOTHING is gonna stop a leak this big....she shows me a $65 bottle about 30 ounces, with what looked similar to "windshield washer fluid" in it...just a light blue liquid in it. After hitting a ton of car-forum sites on Sunday, where 90% of what I read was positive, I called the tech-line for the product (Blue Devil), and told the guy how bad mine was leaking, and he says"It will fix it, and it is 100% guaranteed to...save the bottle and receipt, and if it doesn't fix it you get your money back" (he even gave me his name, and said to call him either way, because he said...it's gonna work)....I did everything by the book...drained the system..ran a flushing agent through it..drained that, then took the thermostat out of the sytem, (I pinched off my heater hoses, even though you don't have to)...then poured in the bottle, topped it off with water, and let it idle for 1.5 hrs.
I drained the system, put my new thermostat in, added my coolant..and brought it up to temp., then shut it off for the night.
I drove 40 miles to work today, it ran right at 200 degrees...heater worked AWESOME, then shut it off and let it cool......checked it 30 minutes later...NOT A DROP OF ANTI-FREEZE GONE!!!!!unk: I will let you know in a few weeks how it's going....but the shit stopped a MASSIVE leak!!! BLUE DEVIL is the product...check it out!!
I drained the system, put my new thermostat in, added my coolant..and brought it up to temp., then shut it off for the night.
I drove 40 miles to work today, it ran right at 200 degrees...heater worked AWESOME, then shut it off and let it cool......checked it 30 minutes later...NOT A DROP OF ANTI-FREEZE GONE!!!!!unk: I will let you know in a few weeks how it's going....but the shit stopped a MASSIVE leak!!! BLUE DEVIL is the product...check it out!!