I know that the torque on the 1991 4 Runner V6 is around 180lbs of torque and the threads have adhesive applied to them. HOWEVER, in my case my problem is just the opposite. My truck lost the bolt and trashed my radiator and I now have to order a new one. - You might find out by calling a dealership if the bolt is LH or RH... This might make a difference... NOTE: Make sure you put set torque properly when you replace it and put adhesive on the threads... If you don't it spins out and slams into your radiator at high speed...
try an impact gun, or rest a breaker bar against the body or something and use the starter
Crankshaft Pulley !
You use an impact wrench or breaker bar and spanner to remove the bolt.. a special insert is placed were the bolt was. Then a three jaw puller is used to pull the pulley off.
Use a chain wrench around the pulley and a breaker bar on the bolt.
You have to remove the timing belt and the crankshaft pulley if you want to get access to the oil pump. The oil pump itself is just behind the crankshaft pulley.
The Crankshaft Position Sensor is behind the crankshaft pulley (harmonic balancer). You will need a ½-inch drive breaker bar and appropriate socket.
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The crankshaft pulley is the large pulley on the lower passenger side of the engine.
On any motor, the harmonic balancer is on the front of the crankshaft. It is what the pulley is bolted to.
Your will have to loosen up the alternator, and take off the alternator belt from around the crankshaft pulley. To get the crankshaft pulley bolt off, you will have to use in impact wrench on it. Should be on the driver side of the car. Also it is a regular threaded bolt. The torque on it from the factory is around 115lb/ft. You will need a 17mm Impact socket and a good impact wrench. It will not break loose easily if there is rust on it like most that are 20 years old. Even with penetrating oil it will not be an easy job. Use care when working with the crankshaft pulley as it is old and will crack easily as well.
Counter clockwise to remove.
most crankshaft pulleys have a left hand thread. this means it turns opposite direction or clockwise to remove