Section 2 Warrantable & Nonwarrantable Flashcards
Shoulder wear
Misalignment
Worn suspension parts
If a tire shows heavy shoulder wear on either the inside or outside edges, it is most often an alignment problem.
Underlying causes include worn suspension parts.
Non-Warrantable conditions
When in the tire business, it will become important that service and parts staff be able to differentiate warrantable from non-warrantable tire conditions. First we will look at common tire conditions that are non-warrantable. The conditions see. Here are the result of improper care and maintenance not materials or workmanship defects. As we go along please enter the cause of each condition in your workbook on page 8
Edge wear
Under inflation
If Both shoulders of the tread are worn more than the middle, the tire may be under inflated. Worn outside shoulders with heavy scratches on the front of the tires could indicate hard cornering.
Center wear
Over inflation
If the tread is worn more in the middle then the edges, the tire may be over inflated. Center wear with vertical scratches indicates spinning
Feather wear
Sever toe misalignment
Severe toe misalignment shows feather wear across the face of the tread. The tire is literally dragging sideways down the road causing a fish scale wear pattern.
Cupping
Out of balance, weak shocks or struts. Lack of rotation.
Dips, cups or scalloped wear would tell you the tire is bouncing as it rolls along because it is out of balance or the shocks or struts are weak. Also lack of rotation sometimes results in cupping.
Road hazard items
Potholes, road debris
If you find any defects or damage such as punctures, cuts, bruises, scrapes or missing chunks of tread, the tire may be dangerously weakened and should be replaced.
Accident/abuse
Spinning, hard cornering, negligence, crime victim
Causes of vandalism, spinning, hard cornering, excessive heat exposure like parking on metal or to close to an open flame and the improper use of chemicals or solvents on a tire are non warrantable
Out of round/ excessive vibration
These are defects that can’t readily be seen but will often cause ride disturbances, vibration or installation issues. If there is no evidence of misaligned or worn parts of the suspension, and the tire needs excessive amounts of weights to balance or can’t be balanced at all, a defect may be present. Have the technician switch the tires from front to back to isolate the issue to 1-2 tires.
Tread separation
Tread separation is just as it sounds. The tread has separated from the casing. A telltale sign is a wavy appearance of an otherwise straight longitudinal groove. In severe cases a short 4-6 section will be worn to the plies, indicating the tread has shifted away from that area.
Sidewall or ply separation
This will typically appear as a bubble or as though the rubber is loose on the sidewall. Start my marking the area with a tire crayon. Since the sidewall bubble can also be due to road hazards like potholes the technician will need to inspect the tire to determine if the problem is due actually to manufacturing defect. The tire will need to be dismounted from the rim. Upon inspection the technician may see the bubble deflate and notice a tear in the liner. This would indicate the tire notice how I didn’t say customer hit a pothole and pushed the tire against the metal rim causing a tear in the inner liner. Air will then leak into the sidewall and cause the bubble. On the other hand if the bubble remains when it is dismounted and there are no liner tear, a ply separation is a good bet and this may be warrantable
Belt edge separation
Shows the edge of the tread peeling away from the sidewall. Steel cloth may also appear at the shoulder seam.
Warrantable conditions
Now that we have ruled out what is non-warrantable, let’s look at the most common warrantable conditions. There is some space to take additional notes on page 9 of your workbook
