TIMING BELT INTERFERENCE CAUTION
Note. CAMSHAFT DRIVE BELTS OR TIMING BELTS - The condition of camshaft drive belts should always be checked on vehicles which have more than 50,000 miles. Although some manufacturers do not recommend replacement at a specified mileage, others require it at 60,000-100,000 miles. A camshaft drive belt failure may cause extensive damage to internal engine components on most engines, although some designs do not allow piston-to-valve contact. These designs are often called "Free Wheeling". Many manufacturers changed their maintenance and warranty schedules in the mid-1980's to reflect timing belt inspection and/or replacement at 50,000-60,000 miles. Most service interval schedules shown in this section reflect these changes. Belts or components should be inspected and replaced if any of the following conditions exist
- Crack Or Tears In Belt Surface
- Missing, Damaged, Cracked Or Rounded Teeth
- Oil Contamination
- Damaged Or Faulty Tensioners
- Incorrect Tension Adjustment
| Application | Engine | Replacement Interval (Miles) | |
|---|---|---|---|
| 924 | |||
| 1976-83 | (2) 2.0L 4-Cyl. | 45,000 | |
| 1985-88 | (2) 2.5L 4-Cyl. | 45,000 | |
| 928 | |||
| 1976-83 | (2) 4.5L V8 | 60,000 | |
| 1984 | (2) 4.7L V8 | 60,000 | |
| 1985-91 | (2) 5.0L V8 | 60,000 | |
| 1992-95 | (2) 5.4L V8 | 60,000 | |
| 944 | |||
| 1983-88 | (2) 2.5L 4-Cyl. | 45,000 | |
| 1989 | (2) 2.7L 4-Cyl. | 45,000 | |
| 944S | |||
| 1984-89 | (2) 2.5L 4-Cyl. | 45,000 | |
| 944S2 | |||
| 1989-91 | (2) 3.0L 4-Cyl. | 45,000 | |
| 944 Turbo | |||
| 1987-89 | (2) 2.5L 4-Cyl. | 45,000 | |
| 968 | |||
| 1992-95 | (2) 3.0L 4-Cyl. | 45,000 | |
| (1) Other interference engine applications may exist which are not indicated here. (2) Interference engine. Check for possible damage to piston(s) or valve(s) if there has been a timing belt failure. | |||
| (1) | Other interference engine applications may exist which are not indicated here. |
| (2) | Interference engine. Check for possible damage to piston(s) or valve(s) if there has been a timing belt failure. |
TIMING BELT INTERFERENCE VERIFICATION (1)
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