Remove the old alternator from the bracket.Once the belt is off, unfasten the mounting bolts connecting the alternator to the bracket.Remove the drive belt from the pulley by loosening the belt tensioner.Disconnect the cable connections from the back of the alternator.Here’s how a professional mechanic would replace a failed alternator: If any readings are out of range while the engine is running, your alternator could be problematic, and you may need a car repair. Load engine: Start turning on accessories (like the headlights, radio, and windshield wipers.) The voltage shouldn’t drop under 12V or go above 14V.With the engine running at around 1000 RPM, the multimeter voltage should stay within 12-14 volts. Alternator assessment: Turn on the engine.A good, fully charged battery should measure between 12.6 -13.2 volts. Battery assessment: With the engine turned off, connect the multimeter leads to the battery terminals - red to the positive terminal, black to the negative terminal.To load test your alternator, you need a voltmeter or multimeter. How Often Do I Need An Alternator Repair?Īn alternator can generally last for about 150,000 miles or 7-8 years before needing replacement. Yes, but only for a short while before the battery fails, then you’ll need an alternator repair. Install the water pump pulley by facing the "F" marks outward.Here are answers to some common questions on alternator repairs: 1. Tighten the cylinder head cover bolts a few turns in the order shown.ġ. Apply silicone sealant to the cylinder head as shown.Ĥ. Install the cylinder head cover gasket into the cylinder head cover.ģ. Verify that the grooves on the cylinder head cover are free of oil, water and other foreign material.Ģ. Turn the crankshaft clockwise twice, and verify that all timing marks are aligned.ġ. Turn the tensioner clockwise using an Allen wrench.Ħ. O If not aligned, remove the timing belt and repeat from Step 1.Ĭaution: Be sure not to apply tension other than that of the tensioner spring.ĥ. Verify that all timing marks are correctly aligned. Turn the crankshaft clockwise twice, and align the timing marks.Ĥ. Install the timing belt so that there is no looseness at the idler side.ģ. Verify that the timing belt pulley mark and camshaft pulley marks are aligned with the timing marks as shown.Ģ. If tensioner rotates with no resistance or does not rotate, replace the tensioner.ġ. O If not within the specification, replace the tensioner spring. Measure the tensioner spring free length. Tensioner, Tensioner Spring Installation Noteġ. Note: Mark the timing belt rotation on the belt for proper reinstallation. Disconnect the tensioner spring from the hook pin.Ĭaution: Forcefully twisting the timing belt turning it inside out, or allowing oil or grease on it will damage the belt and shorten its life. Turn the tensioner clockwise using an Allen wrench.Ĥ. Turn the crankshaft clockwise and align the timing marks.ģ. Remove the cylinder head cover bolts a few turns in the order shown.Ģ. Inspect the pulleys and drive belt for runout and contact.ġ. Adjust the drive belt deflection/tension.ġ. Refer to Powertrain Management Computers and Control Systems Crankshaft Position Sensor.Ĩ. Install in the reverse order of removal.ħ. Remove in the order indicated in the image above.Ħ. For these states, inspect timing belt at 60,000 and 90,000 miles, and replace timing belt at 105,000 miles.įor 2001-05 MX-5 Miata, the replacement interval is 60,000 miles.ġ. For vehicles sold in California and Massachusetts, inspect timing belt at 60,000 and 90,000 miles, and replace timing belt at 105,000 miles.įor 1999-00 vehicles, the replacement interval is 60,000 miles except for vehicles registered in California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia and Washington D.C. For vehicles sold in California, inspect timing belt at 60,000 and 90,000 miles, and replace timing belt at 105,000 miles.įor 1997-98 vehicles, the manufacturer recommends the belt be replaced at 60,000 mile intervals for vehicles sold outside of California and Massachusetts. MANUFACTURER'S SUGGESTED SCHEDULED MAINTENANCEįor 1994-96 vehicles, the manufacturer recommends the belt be replaced at 60,000 mile intervals for vehicles sold outside of California. Since it has been recommended to be replaced at a later mileage for the same vehicle, there definitely is a reasonable chance for it to last longer than the recommended mileage.Īs the visual inspection indicates the belt is still in good condition, I would agree that it is possible to use it for a longer period.
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