If you are looking for an easy way to bleed the air out of your cooling system, I have a great solution. I own a 96 Chevrolet Impala SS with an LT1 Engine and I have found that it is nearly impossible to bleed air of my cooling system without getting coolant all over the Optispark, located directly below/behind the water pump thanks to the OE bleeder screw. My brass valves work perfectly and are very easy to install! For more info, please visit the following web address: http://custom-car-store.yourcustomcar.com/page56.html
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