Do not rotate the
Camshafts or crankshaft when the timing belt is removed or damage to the engine may occur. Begin by removing the timing belt. Rotate the crankshaft counterclockwise until the crankshaft sprocket is three notches BTDC to prevent engine damage if the camshaft sprocket is inadvertently rotated during removal. While keeping the camshaft from rotating, remove the camshaft sprocket bolt, then use two large screwdrivers to lever the sprocket off the camshaft. A strap-type damper/pulley holder tool is recommended for this procedure, but if the old timing belt is not being reused, wrapping a piece of it around the sprocket and using a chain wrench can also hold the sprocket in place. Carefully pry out the camshaft oil seal using a small hooked tool or screwdriver, taking care not to scratch the bore or damage the camshaft, as damage will cause the new seal to leak. Clean the bore and coat the outer edge of the new seal with engine oil or multi-purpose grease, also lubricating the seal lip. Using a socket with an outside diameter slightly smaller than the seal and a hammer, carefully drive the new seal into the cylinder head until it's flush with the face. If a socket isn't available, a short section of pipe can be used. If engine location makes it difficult to use a hammer, fabricate a seal installation tool from a piece of pipe cut to the appropriate length, a bolt, and a large washer, placing the pipe over the seal and threading the bolt into the camshaft to press the seal into the bore by tightening the bolt. Install the camshaft sprocket, aligning the pin in the camshaft with the hole in the sprocket, and using an appropriate tool to hold the camshaft sprocket, tighten the camshaft sprocket bolt to the specified torque. Finally, install the timing belt and run the engine to check for oil leaks.