On 2UZ-FE engines, the timing belt as well as the crankshaft timing belt sprocket should be eradicated. For the 1UR-FE, 3UR-FE, and 3UR-FBE engines, Crankshaft pulley should be removed. It is necessary again to determine to what extent the seal is recessed in the bore, after that it is necessary to remove the seal lip using razor knife. Gently open the seal from the engine using a screwdriver or a seal removAol tool while ensuring you cover the screwdriver head with a tape not to mar the housing bore or damage the crankshaft because, this way, the new seal will leak. Scrub the bore in the engine and grease the outer circumference of the new seal with, engine oil or multi-purpose grease, and the inner peripheral of the seal as well. Engaging another seal driver, or a socket slightly smaller in diameter than the seal, the new seal is hammered into position and is rightly aligned and installed on the same depth as the previous one. A brief piece of large pipe can also be used when there is no plug socket at hand; After this, ensure the check seal to see if the spring did not jump off the bracket during installation. For 2UZ-FE engines, the crankshaft timing sprocket as well as the timing belt must be reinstated while for 1UR-FE, 3UR-FE as well as 3UR-FBE engines, the crankshaft pulley should be reinstated. Last but not the least; start the engine and look for the signs of oil leaking at front seal.