In most cases the crank pulley bolts to the balancer so the crank pulley would not be the same as the harmonic balancer.
You do not have to replace the spark plugs, although you do have to remove the water pump to replace the distributor cap and rotor assembly on the LT1s Optispark which drives directly off the cam behind the water pump. You may even have to remove the harmonic balancer/crank pulley, not sure but be prepared for this. I know the balancer/crank pulley does have to be removed if the whole Optispark (distributor) is to be replaced.
Does the LSS have a 3.8L engine? If so, the crank sensor is behind the crank pulley/harmonic damper.
mine vibrated when the 'cotter key' wore down. the harmonic balancer was causing vibration at about 45-50mph. i guess i learned to ignore it and it warped my crank. --gussmolly@yahoo.com
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.
Crank Pulley, crank sensor, ignition module, dirty maf sensors, clogged fuel filters.
On most newer cars, the crank pulley is one piece with the harmonic balancer.... Remove it with a harmonic balancer puller.
take off the serpentine belt and crank pulley and you will need a harmonic balancer pulley to get it off.
take the serpentine belt off and then take the crank pulley off the balancer and then you will need a puller to get the balancer off the crank.
The crank sensor is located behind the Harmonic balancer. Try not to break the rubber within the Harmonic balancer when removing or on the safe side replace both the Crank sensor and the Harmonic balancer ( the big pulley on the bottom - most part of the engine.)
bottom pulley. at end of crank.
behind the harmonic balancer pulley, i believe.
on the crank behind the drive pulley and harmonic balancer
Behind the harmonic balancer (dampner) that is located behind the crankshaft pulley.
on the harmonic balancer behind the crank pulley
AKA, crank pulley damper, crankshaft damper, torsional damper, or vibration damper.
Take the serpentine belt off and then take the crankshaft pulley off and you will need a puller to get the balancer off the crank.
disconnect the battery, remove the bolt in the center of the pulley, then use a harmonic balancer tool to remove it