Underdrive Pulley
Thread Starter
TECH Apprentice
Joined: Sep 2005
Posts: 340
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From: Amarillo, Tx
Underdrive Pulley Tried to install my underdrive pulley today when I was installing some other parts, but I couldn't break the torque on the bolt. Anyone have any tricks on how to break that sucker loose without turning over the engine. Car is a M6. I feel stupid posting this, but it really aggrevated me when I couldn't get the damn thing loose. Any help is appreciated, thanks.
TECH Enthusiast
Joined: May 2006
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From: south jersey
i tried everything to get mine loose.. i didnt like that it was turning the engine over in gear parking brake on +a ratchet strap holding the pulley from turning, without the car moving (didnt want to break anything). so i took of my cooling fans<very easy (to make room ) for a 1 inch impact air wrench, even that sucker had alil trouble with it. the 3/4 wouldnt budge mine at all.
11 Second Club
Joined: Feb 2003
Posts: 5,524
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From: The South
Check the link in my sig for cam swap stuff, which includes un and re installing the pulley.
Come to think of it I think I put a torch to the head for a short bit to warm it up. Then again I was doing my swap in a 35*F garage.
Come to think of it I think I put a torch to the head for a short bit to warm it up. Then again I was doing my swap in a 35*F garage.
I made a tool to keep the pully still.
Then It took 2 friends on the bar we put over the breaker bar to get it loose. A friend of mine does them all the time with just an impact wrench, but I don't have air tools.
Then It took 2 friends on the bar we put over the breaker bar to get it loose. A friend of mine does them all the time with just an impact wrench, but I don't have air tools.
Staging Lane
Joined: May 2006
Posts: 77
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From: LaPorte, Texas
that tool is awsome! I helped a friend years ago and I did it by using a board, break over bar, and bumped the ignition... I just had the idea, he's the one that insisted we do it. I would never personally do that with my ride. But that tool you fabbed is very cool!
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Staging Lane
Joined: May 2006
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From: LaPorte, Texas
to reinstall, I bought a longer bolt and used four large washers stacked. once it was on and just about seated I use the stock bolt to finish. I stll have that bolt someplace. 
ahhh the good old days. snif snif
ahhh the good old days. snif snif LS1 Tech Stories
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Thread Starter
TECH Apprentice
Joined: Sep 2005
Posts: 340
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From: Amarillo, Tx
Thanks for the input, I tried a 1/2'' impact, that didn't budge it, I also tried using a 18 or 20'' breaker bar, wouldn't move it, maybe I'll try heating it up a lil bit first. Thanks again.
Thread Starter
TECH Apprentice
Joined: Sep 2005
Posts: 340
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From: Amarillo, Tx
Update: PULLEY INSTALLED!!! What a pain in my ***!! For something that should be so simple it was a pain in the *** the whole way. I ended up using a 1/2'' breaker bar and a 4' cheater bar to break the bolt loose. Thanks for the tips tho putting it in 4th def made the difference! Def wasn't fun putting it on since no hardware stores in this town carry metric threaded rod or 16mm bolts over 5''. That definately made getting it on a challange. But its on now so... won't have to worry about it unless I decide to get a cam.... 
But it's in and it does seem to rev a little bit quicker up around 4k def a plus!!!! Thanks again for the replys.
But it's in and it does seem to rev a little bit quicker up around 4k def a plus!!!! Thanks again for the replys.