Question about 2000 Ford Focus
How do you get the adjuster to move on a 2002 2.0 z tech motor so you can change the belt. The adjuster does not have a slot to put a breaker bar on it to move it
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Posted on Jan 02, 2017
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Jul 05, 2012 | 2002 Nissan Frontier Crew Cab
Inspect the belts for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately. It is always best to replace all drive belts at one time, as a preventive maintenance measure, during this service operation.
CHECKING TENSION AND ADJUSTMENT
See Figure 1
The belt tension on most driven components is adjusted by moving the component (alternator, power steering pump etc.) within the range of a slotted bracket. Some brackets (toothed) use a rack and pinion mechanism which moves the alternator side-to-side to adjust the belt tension. With this configuration, no prying tools are required. On Quantum (except 5 cylinder) and Fox models, the air conditioner compressor drive belts are adjusted by varying the number of discs (shims) between the halves of the crankshaft pulley. Before adjusting the belt tension on any engine, look at the mounting and determine what kind of bracket is used.
To check belt tension, push in on the drive belt about midway between the crankshaft pulley and the driven component. If the belt is less than 39.4 in. (1m) long, it should deflect between 0.80-0.120 in. (2-5mm). For longer belts, it should deflect between 0.40-0.060 in. (10-15mm). Belt size is usually printed on the back side of the belt. If it can't be read, it's probably time to replace it.
Fig. Fig. 1: To check belt tension, push in on the drive belt about midway between the crankshaft pulley and the driven component
See Figures 2, 3 and 4
Fig. Fig. 2: Alternator mounting with slotted brackets
Fig. Fig. 4: An extension is helpful when adjusting the tension bolt. Be sure to loosen the nut/bolt on the rear slotted bracket first
See Figures 5 and 6
Fig. Fig. 5: Loosen the tension bolt (shown) and the alternator pivot bolt until the alternator swings freely under its own weight
Fig. Fig. 6: Adjust the V-belt by turning the nut on the tension bolt
See Figure 7
On Quantum (except 5 cylinder) and Fox models, the air conditioner compressor drive belts are adjusted by varying the number of discs (shims) between the halves of the crankshaft pulley.
Fig. Fig. 7: Belt adjusting shims on Quantum (except 5 cylinder) and Fox models. Extra shims are stored behind the tensioner plate on Fox and turbo diesel Quantums (shown)
If there are any shims left over, do not throw them away. On Fox and turbo diesel Quantum models, store the extra shims in front of the split pulley (behind the tensioner plate). On Quantums with 4 cylinder gas engines, store the extra shims behind the split pulley (in front of the crankshaft hub).
REMOVAL & INSTALLATION
If a belt must be replaced, the driven unit must be loosened and moved to its extreme loosest position (usually by moving it toward the center of the motor). After removing the old belt, check the pulleys for dirt or built-up material which could affect belt contact. Carefully install the new belt, it may appear to be just a little too small to fit over the pulley flanges. Fit the belt over the largest pulley (usually the crankshaft pulley at the bottom center of the motor) first, then work on the smaller one(s). Gentle pressure in the direction of rotation is helpful. Some belts run around a third or idler pulley, which acts as an additional pivot in the belt's path. It may be possible to loosen the idler pulley as well as the main component, making your job much easier. Depending on which belt(s) you are changing, it may be necessary to loosen or remove other interfering belts to get at the one(s) you want. Some models have a front engine mount installed through the air conditioner compressor belt circle. Support the engine and remove the mount prior to belt removal and installation.
When buying replacement belts, remember that the fit is critical according to the length of the belt, the width of the belt, the depth of the belt and the angle or profile of the V shape (always match up old belt with new belt if possible). The belt shape should exactly match the shape of the pulley; belts that are not an exact match can cause noise, slippage and premature failure.
After the new belt is installed, adjust it for proper tension. This is sometimes a three or four-handed job; you may find an assistant helpful. Make sure that all the bolts you loosened are retightened and that any other loosened belts also have the correct tension. A new belt can be expected to stretch a bit after installation so be prepared to re-adjust your new belt.
After installing a new belt, run the engine for about 5 minutes and then recheck the belt tension.
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