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Posted by DSM_IKE, Nov 20, 2010
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.
Crankshaft sprocket tool
As mentioned above, many people use what is called the "bump" method to loosen the crankshaft bolt. To do this, you must either have the timing belt still on the car or have removed the camshafts (or the whole head, if you are in that position) so the valves are not open. The engine will rotate clockwise when the starter is engaged. To be safe, pull the MPI (Engine) 30A Fuse under the hood to keep the engine from starting. Place the appropriate socket and breaker bar on the crankshaft bolt where the breaker bar is resting on the control arm or wedge it against the ground. Put the key in the ignition and "bump" the starter.
I don't care for that method, so I make certain I have another person available. Put the car in 5th gear and have the other person hold the brakes hard. Use a 1/2" breaker bar with appropriate socket and cheater bar if available and give that bolt hell. This, unlike the bump method, works to tighten and torque the bolt.
Still others use pneumatic tools for quickest removal: http://www.dsmtuners.com/forums/newbie-forum/352233-removing-bolt-holds-crankshaft-sprocket.html
However, if you just want to take it off, I use lots of PB Blaster, a chain wrench around the pulley, and a 1/2" drive breaker bar in the center of the bolt. Has always worked for me. BUT like I said, you do NOT need to remove this bolt to remove the pulley.
Hope this helps!
The Large center bolt holds the Timing Belt Teeth Pulley to the crank. The 4 10MM bolts (I thought they were 12MM?) hold the Water Pump/AC Belt pulley to the crank. When you take those 4 bolts off the pulley will just slide right off.
Your best bet is to rent or borrow an impact gun for that large center bolt. That's about the only way you're going to easily get it off without getting a headache.
I just went and checked and you are correct, the 4 bolts which attach the harmonic dampener (crankshaft pulley) to the crankshaft sprocket are 12 mm. My post has been corrected.
No sweat. I was about to go check myself on that too. I recall most of the bolts related to the engine and I just couldn't wrap my head around they idea that those 4 were 10MM.
Can't very well change an/"the" oil seal by only removing the crank pulley.
Very true, I missed that part.
NOW, tightening up that bolt (100ft lbs) is the trick needed for a chain wrench and a beam torque wrench.