Using dry nitrogen to pressure test a system is a very effective method of verifying a system is leak-free. In fact, I believe it is more reliable than using a standing vacuum test typically performed ...
Author's note: In the Jan. '09 issue of HPP, the technical article "Keep a Cool Head" described installing Evans NPG coolant in a Pontiac engine, along with other modifications. Due to the varied ...
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Q:I have a 2002 Ford Ranger with 218,000 miles. Lately, after my truck is warmed up and I shut it off, it builds pressure in the overflow reservoir and bubbles out of the lid. At first, I thought it ...