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Tyre Ratings & Best Tyres for Road Use — With Real Vehicle Examples

1. Tyre Ratings: What to Look For These ratings appear on the tyre sidewall and help you judge quality, safety, and performance. Treadwear Rating This tells you how long a tyre is likely to last. The higher the number, the longer it should last. A treadwear of 400 means the tyre will last about 4 times longer than a baseline test tyre. Traction Rating This shows how well the tyre grips on wet roads. The grades are: AA (excellent), A (good), B (moderate), and C (poor). Temperature Rating This tells you how well the tyre resists heat. High heat resistance means the tyre won’t overheat and burst at high speeds. Grades: A (best), B, and C. Load Index This number shows how much weight one tyre can safely carry. You must match this to your vehicle's weight class. Speed Rating This tells you the maximum speed the tyre can handle safely. For example, H = 210 km/h, T = 190 km/h, etc. 2. Best Tyres for Personal Vehicles (By Model) a. Toyota Corolla / Honda Civic Recommended Tyre: Michelin Pr...
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Common faults associated with your car alternator

 Common faults

Before starting be sure that the noise is coming actually from the alternator because noise can come from water pump, power steering pump, fan or other drive belt. Once the source is established, check the following cause.

 

Noisy alternator

·         Worn belt which has to be replaced

·         Loose alternator mounting. Tighten it

·         Damaged rotor or fan replace as necessary

·         Worn or defective alternator bearings. Replace only

·         One or more rectifiers may be open or short circuited. Test as described. If defective diode, if any replace.

·         Defective stator wiring. Test it as earlier and remedial action take place.

 

Incorrect charging.

Excessive gassing from the battery and adding water more often, indicates high voltage of the charging system, whereas a weak battery may mean either the defective battery or fault charging. To pin point the source of trouble, proceed as follows

1.        Check condition of the battery, cables and terminals. If found okay check the tension of the drive belt, adjust if required.

2.       Check for loose or corroded connections at the alternator and regulator. Remedy as necessary.

3.       Check whether the regulator and alternator are grounded if not ground the same.

4.       With ignition switch on the voltage at field input brush terminal should be equal to the battery voltage i.e. 12v in case of cars. If it is okay proceed separately in case the charging rate low or excessive.

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