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There it seems ~ to be alot of opinions about how to replace the serpentine belt tensioner and also idler pulley, so right here are my 2 cents.I had the usual symptoms the a tensioner/idler beginning to failure - a chirp on every startup and chatter during idle. Ns opted for the complying with Gates parts, which were very similar to OEM: gateways tensioner #38188:
Even if just one that those components is poor on your vehicle, it renders sense to change both in ~ the very same time - and also to use quality parts - due to the fact that this is just one of those emphasis PITA tasks that girlfriend don"t wanna repeat a year native now.Overview that accessory journey systemOn a ZX3 Zetec, the serpentine belt snakes about seven pulleys. From underneath the vehicle, it looks favor this:
Why this job is a PITAThere doesn"t show up to it is in a basic or fast method to execute this job, due to the fact that the tensioner & idler room not easily accessible from over or below the car - they room midway down and face-to-face with the fender.From the top, they are difficult to reach:
(You may have noticed that this pic doesn"t look prefer the vault one that plainly shows all of the pulleys, because that photograph was snapped about step #8 in the procedure below.)ProcedureYou can pick to execute this task from the height or bottom, however either way, you"ll need to raise/lower the engine. I discovered a combination to be the easiest, and also in the following procedure, the steps in blue text space performed under the vehicle. It"s a tiny like a church revival - you"re gonna be doing part standing, some kneeling, part lying down, part praying, and also some shouting. If you have an intricate tools or small hands, then you might be able to take some shortcuts.1. Move the coolant overflow tank and also power steering reservoir the end of the way.2. Lift prior of vehicle and remove passenger-side wheel.3. Eliminate the plastic fender liner via the 6 fasteners:
5. Optional action while you"re under the car: the engine moves up/down less complicated if it is disconnected native its reduced rear mountain (dogbone), and it just takes a minute to remove the hinge bolt (horizontal bolt).6. Supporting the engine through a hydraulic jack & block of hardwood under the oil pan, remove the passenger-side engine mount. I won"t clutter this thread v those details, however two helpful things to remember room to very first trace approximately the mount & bolts v a pencil, and also then eliminate the 2 engine nuts and three framework bolts.7. Carefully lower the engine a little bit until the tensioner deserve to be accessed indigenous under the vehicle.8. Under the vehicle, draw the belt route on a item of record or photo it. Then, ar a wrench top top the tensioner"s pulley bolt and rotate clockwise to slacken the belt. If her tensioner is old choose mine, climate it will certainly be stuck and reluctant come move. Remove the belt from a pulley and release the tensioner.9. Carefully raise the engine until the idler pulley-block bolt gets rid of the peak of the fender. The idler is attached to the engine block v a single bolt, which has actually standard subject (lefty-loosey). Eliminate it:
10. Now, the tensioner is accessible. The is attached v two bolts; they are not torqued tight, so start with your smaller, low-profile tools. If those aren"t sufficient, then relocate on to your bigger tools, closely raising the engine a bit an ext to accommodate them. If your tensioner is like mine and is stuck in that previous position with its sheave obstructing the left bolt, then move the pulley by place a wrench on its facility bolt and also rotating counterclockwise (which might require friend to reduced the engine again and access it native under the vehicle). Keep in mind that the pulley have the right to be removed from the tensioner by unscrewing the counterclockwise (normal object - lefty-loosey).
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11. Install the new tensioner. 2 bolts - ns torqued them to 18 ft-lb.12. Install the new idler. One bolt - ns torqued it come 30 ft-lb.13. Install the serpentine belt. One strategy is come loop that around every one of the pulleys other than the A/C.14. Reduced the engine a little bit so the the tensioner is easily accessible from under the vehicle.15. Under the vehicle, use your left hand come wrench the tensioner"s pulley-block bolt clockwise come slacken the belt, and use your right hand to loop the belt about the A/C pulley. (Your new tensioner might require a great deal of force.) Double-check that the belt is totally seated in all sheave grooves, and that that is routed correctly.16. Raise the engine come its natural resting position and reinstall the passenger-side engine mount; you may have to fiddle v the jack to align the mount"s bolt holes. Totally torque its two engine nuts (use Loctite if you have actually it), and then install the three framework bolts but do not fully tighten them yet.17. Under the vehicle, reinstall the dogbone mount"s hinge bolt, swinging the engine forward/backward to align the hole. Don"t force the engine into an unnatural place that reasons the mount to bind. Fully torque the bolt, making use of Loctite if you have it.18. Completely torque the passenger-side mount"s three structure bolts, aligning to your pencil trace. Eliminate the hydraulic jack and also block that wood.19. Replace the power steering reservoir and coolant overflow tank.20. Begin the engine and also make certain the brand-new tensioner & idler space okay. (If you room paranoid, then remove the coil fill pigtail and crank the engine a few times without starting it, and see if the belt continues to be seated properly.) If over there is one odd noise, then shut turn off the engine before you technique the engine compartment.21. Under the vehicle, reinstall the plastic belt guard.22. Reinstall the plastic fender liner.23. Test journey the car. If there is an inexplicable vibration in ~ idle or once driving forward/reverse, then you can need to adjust the passenger-side engine mount"s three structure bolts.