What is up engine heads! Today we're checking piston to valve clearance on Toyota 1.6 4AFE engine. I am checking piston to valve clearance because I want to use different pistons for my build. I want o use the pistons from the 1.6 4AGZE supercharged engine. But 4AG and 4AF engines have different valve included angles, resulting in different valve cutouts on the pistons, meaning that 4AGE pistons might not properly work with 4AFE valves.

Your piston to valve clearance is an extremely important measurement and should be checked and verified every time you modify something on your engine that can affect your piston to valve clearance. So stuff like getting higher lift and higher duration cams, shaving your cylinder head, decking your engine block, using different pistons, increasing the size of your valves.

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