Today, I was successfully off the pulley bolt, but I can not take off the crank pulley, and I am planing to put this euro damper from the CourtsyNissan.http://f1.pg.photos.yahoo.com/ph/jaynekondo/detail?.dir=/afc3&.dnm=16a2.jpg

Do I need some puller or something? or some kind of secret technick?

http://f1.pg.photos.yahoo.com/ph/jaynekondo/detail?.dir=/afc3&.dnm=80b6.jpg

jaynez31

Just like my 72 240z, I am from Japan too, what's heck(about my spelling and grammer).

I am just going from memory here, so someone correct me if I am wrong...

What you have on the engine now is actually 2 separate pulleys. The front one is basically just held on by the mounting bold, and is powered for rotation by the heads of two socket-heat cap screws (Allen-bolts). Any standard wheel puller should just pop it straight off, but you may need to push against the original mounting bolt, because the hole in the first pulley is just large enough for the mounting bolt to pass through.

The back pully is actually a harmonic balancer for the engine. It has a keyway in the balance pully and another in the crankshaft with a steel key between them to maintain angular alignment. To remove that thing you need to remove the two socket head cap screws, and use those tapped holes with an appropriate wheel puller.

Any good auto parts store will have the tools that you need.

YES, You will need to buy, rent, or borrow a "Pulley Puller" to remove the Crankshaft Pulley from your engine.

Some Parts stores have them for rent, many have them for sale. Or maybe a friend of yours has oner you can borrow.

On my L24, the "Two Grooves and Harmonic Balancer" are all one item. The puller I use grips the Pulley/Damper (Harmonic Balancer) and the center bolt of the puller actually pushes against the nose of the crankshaft to "pull" the assembly off of the crank nose.