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Old 09-28-2007, 01:16 PM   #1
Edo Performance
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Default Install Guide: Zero/Sports WRC Pulley

Hello again from EDO Performance!

Today we have for you an installation guide for the Zero/Sports WRC Pulley. It is being installed on a 2006 STi, but the procedure will be the same for any other compatible Subaru.

The Zero/Sports WRC Pulley is a direct replacement for the WRX/STi crankshaft pulley. The factory pulley weighs in at a heavy 5.4 pounds and is a perfect place to shed some weight. Removing weight from a moving part of the engine is even more critical than removing dead weight from any other part of a car. Removing the weight from the pulley allows the engine to move faster with less effort, allowing for faster revving response and the production of more horsepower and torque.
The Zero/Sports pulley, made of lightweight aluminum, weighs in at a very light 1.4 pounds. The pulley will remove a full four pounds of weight from your engine, which adds up to a big difference!

1. Before installation, you might want to open your hood and let the engine bay cool. You will be working near some parts that can get pretty hot.



2. The first step is to remove the belt cover and air intake snorkel. This can be done by removing the four 12mm bolts circled in the picture. Although it is not required to remove the intake snorkel, I find it gives you a little extra room to work with.



3. Next, you can start taking the belts off. To remove the air conditioner belt, loosen the 12mm nut on the tension adjuster pulley and then start to unscrew the tension adjuster bolt. You will notice the pulley start to move up, continue unscrewing the bolt until there is enough slack to get the belt off the air conditioner compressor pulley. When removing the belts, make sure you remember which one went where, as the two are different.



4. Now you need to remove the alternator/power steering belt. This works in a very similar way, except the alternator itself is the tensioning pulley. Loosen the alternator bolt, then start to unscrew the adjuster bolt. As you unscrew it, press down on the top of the alternator until it is low enough to remove the belt.

5. Now you can remove the large bolt that holds the crank pulley in place. To keep it from turning you will need to pull up the parking brake and put the car in fifth or sixth gear.



6. Using a 21mm socket and a long breaker bar, remove the bolt at the center of the pulley. The bolt is in very tight (spec. 133 ft/lbs), so you might need to use some force.



7. In a side-by-side weight comparison, the Zero/Sports WRC Pulley weighed in a full four pounds lighter than stock. That's a lot of weight!

8. Install the new pulley where the old one was, making sure the little notch in the center is lined up correctly. Attach it with the old crank pulley bold and torque to 133 ft/lbs.



9. Install the accessory belts on to their respective pulleys and tighten them using the long adjuster bolts you loosened before. Tighten each belt so that you can only push it down about one-quarter to one-half of an inch.

10. Tighten the bolts on the alternator and the tension adjuster pulley (18 ft/lbs each).

11. Reattach the belt cover and intake snorkel.

12. Close the hood, get in, and enjoy the new power and response!


If you would like to request an install guide for any of the other products we carry please fee free to contact us!

-Kevin
[email protected]
AIM: EDO Kevin
714-602-5741
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Last edited by Edo Performance; 10-05-2007 at 12:30 PM.
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Old 09-29-2007, 11:04 AM   #2
Jaxx
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the parking brake is usually not enough to hold it a friend with there foot on the break is i use a breaker bar and a 6' pipe

removal on 07 wrx and 05+ legacy will be interesting as both the clutch and flywheel are sprung, both of which will have to be compressed before you will have enough torque to loosen the bolt
this may be too much movement without removing allot more parts
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Old 09-29-2007, 11:31 AM   #3
nhat
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how much is that piece? pm?
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Old 09-29-2007, 12:31 PM   #4
arkleseizure
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Nice guide...I haven't seen a very good pulley install guide yet.
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Old 09-29-2007, 12:35 PM   #5
Defiant Autospeed
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+1 for buddy standing on the brake pedal in 5th gear
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Old 10-25-2007, 05:31 PM   #6
Edo Performance
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Please feel free to ask any questions if you have them.
We are always glad to help out!
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Old 01-09-2008, 03:37 PM   #7
elislider
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thanks for posting this, i think ill install mine tomorrow
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Old 01-31-2008, 11:35 PM   #8
Lee 93
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Quote:
Originally Posted by Edo Performance View Post
Please feel free to ask any questions if you have them.
We are always glad to help out!
Just wondering . . . your torque spec is 133 ft/lbs while other manufacturers say 90 - 96 ft/lbs. Could you explain why there is a difference, please? Thanks.
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Old 07-25-2008, 10:36 PM   #9
iyzmi
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Quote:
Originally Posted by Lee 93 View Post
Just wondering . . . your torque spec is 133 ft/lbs while other manufacturers say 90 - 96 ft/lbs. Could you explain why there is a difference, please? Thanks.
Bump, anybody know?
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Old 07-27-2014, 11:40 PM   #10
Raakochet
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Thumbs up Just an FYI on keeping pully in place while removing bolt...

I used a larger strap wrench and it worked like a freakin' charm to keep the pulley from turning. So, if you have one, or your neighbor has one, you're in bidness.

Strap goes around the pulley, make sure it's facing the right way to keep pulley from turning counter-clockwise (I had the handle for mine sticking up in-between the power steering and alternator pulleys), and yank breaker bar with one hand and push strap wrench with the other. Easy peasy.
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