On a 1990 Acura Integra RS is the crankshaft pulley bolt reverse thread?

Answer 1

No - The crankshaft bolt will loosen counter-clockwise. Because the crank bolt is so hard to remove it can seem as though it is reversed threaded. The crank turns the opposite direction that is used to tighten the bolt. For the crank bolt Lefty-Loosey (counter clockwise), Righty-Tighty (clockwise) apply here. The crank bolt is tightened to 87 ft/lbs of torque. It took more then 87 ft/lbs of torque to loosen my crank bolt. The manual says to apply a drop of motor oil when reinstalling the bolt. An Harmonic Balancer Pully Holding Tool is used to hold the crank while working with the crank bolt. Holding Tools can be found on the internet for $20 to $73. There are two sizes, 45 mm and 50 mm. For a 1990 model year the size is 50 mm. I made an Harmonic Balancer Pully Holding Tool by tack welding a 2 foot length of 1 1/2 inch by 1/2 inch piece of stock, for a handle, on a 2 inch (50 mm) hex nut. The nut fits into the pully to hold the crank and the socket, used to turn the crank bolt, fits through the nut.