So you just read up on Tim's article on
the basics of the Underdrive Pulley, and now you wanna install one?
This article gives you the basics you need
to know how to install a ASP crank Underdrive pulley on a 1994-1998 v6 mustang.
You can pick one up for about $75-$100, check out our sponsors and they will
give you a hook up.
If you have a 1999+ v6 mustang it is all
different and actually much more expensive from what I understand so good luck.
(Finally a plus to own a 94-98) So now lets do it.
WHAT YOU WILL NEED:
-Underdrive Pulley (of course)
-New Belt that fits (mine came free with the UD pulley)
-Ratchet/Sockets (with extentions)
-Air tools are recommended (can be done without)
Steps:
1. Loosen Bolts on Crank Pulley. Yeah, alot easier said than done.
Okay I first tried this without using air tools and I had trouble keeping the
crank from moving. So I suggest leaving the belt on until you loosen the bolts
on the crank pulley. The best way to do it without air tools is to have someone
help you keep the belt from moving while you loosen the bolts on the crank pulley.
There are 4 bolts that hold the crank pulley on and I suggest using WD40 to
help loosen them up. Using an air impact wrench it is a tight squeeze but I
was able to get bolts loose quickly and easily. Once the bolts are loose then
continue to remove the belt and then the pulley.
2. Remove Old Belt.
This is pretty straight forward. I used the tensioner, grab the right socket
and go counter-clockwise with it on the tensioner- this allows you to pull the
belt right off.
3. Install New Crank Pulley.
Alright, put the new pulley on and make sure you get it straight. If you have
a torque wrench, go ahead and torque the bolts up to 28 foot pounds.
If you are having trouble with the crank pulley moving, install the pulley and
get the bolts tight as you can then install the belt and then finally go back
and tighten up the bolts.
4. Install New Belt.
Do this just like you took off the old belt. Use the tensioner and go counter-clockwise
and I had someone to help me put the belt on. Double check it and make sure
it is all on straight just as it was. Start up the stang and inspect everything
and then enjoy your extra 9HP!
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