Car expertise is advancing at wonderful velocity so it is no surprise that not less than a couple cool issues flip up each mannequin year. The Pencil Hardness Test supplies a easy technique to test the scratch hardness of coatings. On this check, pencils in a spread of 6B to 8H hardness-grade are used. Pencils graded utilizing this method is used to measure the hardness and resistance of varnishes and paints. The resistance of a coating (also called its pencil hardness) is set as the grade of the hardest pencil that does not mark the coating when pressed firmly towards it at a forty five degree angle. There was an alter history of the 5.three-liter V-8 engine for the 2003 Chevrolet automobiles. Dubbed the L59, it was the flex-gas story of the Vortec 5300, belief that it was designed to dart on enhanced than one sort of fuel. Chevy trumped-up … Read the rest