super51fan;1999835 said:
The timing gear and crank pulley are both supposed to slide off and on by hand. They are held on by the crank bolt. IE: no interference fit. However corrosion can build up over time making them hard to remove. You should clean crankshaft snout and the holes of both with some fine emery cloth before reassembly. A light coat of antisieze on reassembly could not hurt for future tear downs. The crank seal prevents oil from leaking out. Not press fit timing gear.
This is the ONLY post that makes any logical sense.
Not press fit guys, thats why there is a BOLT securing the timing gear/crankshaft harmonic balancer assembly. Guess you "mechanics" haven't looked at anything but a Toyota engine. Go look at the crankshaft harmonic balancer on a straight six out of an 82 Chevy C10, see a bolt holding it on? No? OHH well THAT'S A PRESS FIT BUDDY! Requiring the use of tools to install and remove.
Toyota suggests the use of SST's because in their automotive engineering quest they've realized a little fact called static friction. That is the need for the SST's. The pulley and gear were designed and engineered to be installed by hand, if it was press fit every human would need to use a tool/machine to install it, not just random humans, but all of them.
Front crankshaft seal rides on snout of crankshaft to keep oil from coming out of the crankcase on 7M. The only time you need to use FIPG on the crank snout/crank balancer securing bolt flange is when the front crankshaft seal rides on the crankshaft harmonic balancer, like on the Ford Duratec engines. Two different designs.