OH RIGHTTTTTT ;)

I doubt you needed to oil it anyways since it's practically a brand new engine but it's probably for peace of mind. How are you liking the new pulley?

I don't know about leaving the tension on when i break the bolt loose, but it's already stiff with it in 6th gear. Yes an impact gun is easier but a breaker bar would be easier to get access to for the rest of us without a nice gun and compressor.
thanks! I hope it really helps people avoid mishaps and share any tips and criticisms I may have left out!

haha he can always re-edit and remove the img /img tags. congrats on your brz! drive it stock and maybe break it in before you install the pulley?

you're welcome!

the way torque works is it is not additive. you just push until you hear a click. The whole initial 33lbs part and note the 45 degree turn I think applies to older worn engines. The bolt is practically new I don't think you need to worry about replacing it unless you fubar'd it. maybe someone can clear it up for us?

thanks, I will clean it up a bit and add missing pictures and steps when I do some local pulley installs for whoever needs them.

try re-editing it and removing everything I wrote :happyanim:

So far the first three gears feel... "peppy" it certainly feels more nimble and quicker to get me to 5k-7.4k range. I'll have to drive more spirited. I've never hoped for more red lights before.. lol

I haven't heard of anyone having catastrophic damages done on the forums.. and I believe Perrin to be highly regarded by the Nasioc community. Yes there will be those .01% failure rates but it's the risk we take for the enjoyment of our cars!

LOL *cough* keep it clean guys. don't wanna start a new fresh thread now... :paddle:

Regarding "balance" of the crank pulley: most engine configurations vibrate to hell, in order to lessen this manufacturers often have a dual purpose crank pulley. That is, the crank pulley also acts as a harmonic dampener to reduce the vibrations inherent to the engine design. Recall, I said most engine designs have vibrations; the horizontal/opposed-piston/flat engine does NOT. Therefore, the pulley doesn't need to act as a harmonic dampener. When queried about this in the early 2000s, SOA stated that the pulley was NOT a harmonic dampener. So people should stop talking about balance.

Issues seen with crank pulleys in Subaru applications typically manifest as misfires or ghost misfires/CELs, usually when used in conjunction with lightweight flywheels.

Wow, compared to my friend's Si that we'll be changing that crank pulley on, this is a breeze! Thanks for the write up! :thumbsup:

lol... edit your post where you quoted the WHHOLE thing.. and remove the images so this is readable.

Wrong... A pulley can still be unbalanced without the shape of the material being the cause. Think of the reason you get a wheel balanced when you change tyres - it's to make sure the whole wheel is balanced around the central axis. A poorly balanced wheel can shudder and vibrate while driving, it can also reduce the life of things like wheel bearings and suspension bushes as a result... However, due to the relatively small inertia of the pulley compared to the crank, and the fact that the pulley is probably not far out of balance in the first place, it shouldn't matter.

As for the adding oil to the thread of the crank bolt, also a bad idea.. Adding oil modifies the friction of the threads, meaning you overtorque the bolt (as with the oil you have to tighten the bolt more until the same torque registers on the torque wrench). You should not add oil unless it was stated in the install instructions.

Finally, in general, when a bolt is told to be torqued to a certain torque spec, and then turned through another angle, it is generally not good to reuse that bolt. The extra turn usually causes the bolt to undergo plastic deformation - ie. the bolt stretches (as with head studs/bolts), which has usually been done when the pulley was first installed from factory. This will probably not matter either.. I'm sure Perrin would have done their research when they came up with the instructions.

Added to the DIY Directory:
http://www.ft86club.com/forums/showthread.php?t=7365

Perrin's instructions call for oiling it.

Let me amend my statement: people should stop talking about crank pulley balance. Nearly every time a person uses crank pulley and balance in the same sentence they are referring to a harmonic dampener, not to the actual balance around the central axis.

Then we have no problem. :)

It was really just to clear it up for anyone unsure about this kind of stuff. I didn't mean to come off as aggressive, if I did - I'm only trying to make sure noone does any damage to themselves or their brand new car! :) I know there are a lot of people on these forums that have very little mechanical knowledge or experience, and so making sure everyone is using correct terminology, and that everything is explained well (as with this DIY), along with giving good information, is important to keep everyone safe...

Ugh, don't remind me. The crank, alternator, and idler pulleys were royal pains. That crank bolt was FIERCE, I think I suffered some permanent hearing damage from hearing that damn thing pop off. ;) I think I tried putting it in 6th on the Si and didn't have any better luck. I do know I ended up with a cat-claw in the flywheel to get it to bust.

I can imagine it already, "hey man, want to help me do the crank pulley in THIS car?" :D "Oh no, not again..." :( "No, really, it's a lot easier I promise!" :)

done :thumbsup:

:iono:

What i use at work is a chain wrench and you can find them at your local parts store (for any one having problems taking the crank bolt off)

Recommend placing a old belt or rubber hose around the journals of the pulley to protect it from damage.

I suspect they are virtually equivalent. Or at least I hope so. Not all torque wrenches go up to 90 lbs-ft. For instance the one I have only goes to 80 lbs-ft. So what I'm going to do is dial it in to 14.5 lbs-ft and then do another 90 degree turn as the manual states. I will be doing this install sometime this week. I'll post if I have issues.