Took 90 seconds to loosen up the crank, water pump and alternator. You can't do this install without it.ħ. To remove all the bolts, leave the belt in place and loosen all the bolts. They cost around $4 - $150, depending on features. You'll need this to remove the crank pulley in the 4.6L. You'll need a large wrench, 18mm socket and a harmonic balancer pulling tool to remove it.Ħ. Here is a shot if the harmonic balancer pulling tool. You can use a wrench to remove it.ĥ. Here is your crank pulley. It will need to be removed with an special impact wrench.Ĥ. Here is your water pump pulley. The alternator, water pump, and crank pulley are the ones we'll be changing out.ģ. Here is the Alternator pulley.

Cost $129 for the kit.Ģ. Here are your stock pulleys. They come with a new crank shaft bolt and hardware. You get an alternator, water pump and crank pulley. Here'we go ! Disconnect the battery before starting:ġ. Here is the March set of all billet machined pulleys (all three). You will need to use a special harmonic balancer pulling tool to remove the stock crank pulleyīTW 'pulleys' is the correct plural spelling VS 'pullies' -). So you will still need to bolt your stock crank pulley to your new underdrive to have this extra dampening. The 4.6L engine crank is INTERNALLY BALANCED (SOHC / DOHC) so there is no harmonc balancer to worry about (like on the 5.0), BUT the external crank pulley on the 4.6L also acts as a vibration dampner, there is a thin rubber ring to absorb any extra vibration on the stock crank pulley. You don't even need to change the alternator pulley, but we did just to show you how (it's easy). On the 5.0 this was difficult with the tensioner almost at full stop, but on the 4.6L, because of it's belt design and accessory locations, you can make up for the underdrive crank almost entirely at the water pump. Also, the alternator pulley is only 1/2 a centimeter larger than the stock alternator pulley for NO CHARGING PROBLEMS !!!! We've been waiting for this feature from several kits we've seen and used. Some nice things about this set is the fact that all three pullies are billet aluminum for great weight savings and less rotational mass for each pulley. The installation is similar on the 4.6L DOHC or Cobra engine. Here we will show you how to install a set of underdrive pullies on the 4.6L. Watch us install a set of Underdrive Pulleys on our 4.6L.

Free instals Undergrave