Tuesday, November 19, 2013
The Normal Alternator Output Voltage
An automotive alternator generates electrical power to run the engine and charge the battery. An alternator that is putting out a reduced charge will eventually cause the engine to stall and not properly charge the battery, which can cause starting problems.
Normal Output
An alternator should put out between 13.5 and 15 volts of power. The alternator should be tested with the engine idling and electrical accessories, such as the radio and headlights, turned off. A reduced output may be a sign that the alternator is failing, but the drive belt and wiring should be inspected before replacing the alternator.
Belt Problems
A stretched or slipping alternator drive belt may cause the alternator to not produce a full charge. The belt should be inspected to assure it is properly tensioned and not damaged. A drive belt should be soft and pliable. Belts that show cracks, uneven wear or have a glazed appearance should be replaced.
Wiring Problems
The wiring and connections attached to the alternator should be examined for looseness, corrosion or other damage. Corroded battery terminals and cables are a common problem on many vehicles, and this corrosion may cause a discharge of voltage and should be repaired.
Sunday, October 27, 2013
What Is a Normal Shock Absorber Life
Although all shocks give a manufacturers suggested replacement period, there isnt any way to determine the actual lifespan of an individual shock absorber. The normal lifespan is influenced by real world driving conditions.
Suggested Maintenance
The majority of car manufacturers suggest replacing shocks every 60,000 to 80,000 miles. Most shock replacements fall into this time frame.
Normal Lifespan
According to the website Basic Car Repair, "shock absorber life depends primarily on the roads over which you drive." They might fail almost immediately, at say 5,000 miles, or might last well into the 60,000 to 80,000 mile range. The average manufacturer suggested replacement time is between 20,000 and 30,000 miles.
Individual Shocks
An individual shock may be structurally defective and should be checked periodically, whenever you do basic maintenance. Because there is no way to predict the life expectancy of shock absorbers your best bet is to pay attention to the way your car feels when it goes over bumps. If there is a sudden change and you start to feel residual bouncing after hitting a bump, it is probably time to check the shocks.
