![]() ![]() ![]() If they are, the zero on the degree wheel will now be the true TDC point. Retighten the bolts, and rotate the engine again making sure that the readings on each side of TDC are equal degrees away from zero. Now either move your pointer by this many degrees, or carefully loosen the degree wheel (without disturbing the position of the crankshaft) and move the wheel this required amount. Go back to the degree wheel and write down the degrees it now reads.Īdd these two readings together and divide the answer by two. Turn the engine by hand in the opposite direction until the piston comes up and stops on the piston stop again. Look at the degree wheel and write down the number of degrees shown by the pointer. Turn the engine by hand, rotating it until the piston comes up and stops against the piston stop bolt. Install your positive stop device into the spark plug hole. Now rotate the engine to move the piston down into the cylinder. Mount the pointer and line it up at zero on the degree wheel. You will then split the difference in these readings and move the pointer this amount, making it the true TDC point.įirst mount the degree wheel on the end of the crankshaft, and rotate the engine to approximate TDC To find Top Dead Center use a piston stop, to stop the piston in the same position on either side of TDC and take readings from the degree wheel. If you change your timing belt or chain, chain tensioner, cut your head, or deck your block, you must degree in your cams.ĭISCONNECT THE BATTERY! Do not use the starter to perform any of these steps. Web-Cam offers a complete cam degreeing kit, see below for part number information or call for more information. ![]() 001" increments, a stand that mounts it to the engine, and a positive stop device to locate TDC. The basic tools required are a degree wheel, a stable pointer that can be mounted to the engine, a dial indicator with at least one inch of travel in. For best performance, you should degree in all performance camshafts. You can never be sure that the cam is in its correct position until you degree it in. If there were no manufacturing tolerances, you would only need to line up the marks on the timing chain sprockets and the cam would be degreed, but with a group of components (the camshaft, crankshaft, timing chain, and sprockets) all with their own standards and tolerances that when installed, can stack up against you. A few degrees of misalignment can affect the engine's operation dramatically. Degreeing in your camshaft means synchronizing the camshaft's position with the crankshaft. ![]()
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