Timing Belt & Pulleys (Turbo Models): Inspection

Timing belt must be handled carefully. DO NOT bend belt in an arc less than .79" (20 mm) in radius. Avoid twisting or kinking belt and DO NOT allow belt to be contaminated by water, oil, dust or other contaminates.
Inspect belt for cracks or cuts on front and rear surfaces, abnormal wear on sides, cracked or frayed areas on front of belt (ribbed side), and abnormal wear on ribs. Replace belt if any of these conditions are present.
Using a rubber hardness tester, measure hardness of belt at 3-5 places around circumference of belt. If any single measurement exceeds reading of "90" on tester, replace belt.
Using outside vernier caliper, measure outside diameter of crankshaft, oil pump, and camshaft timing pulleys. Also measure outside diameter of tension pulley. If any pulley exceeds specification, or shows signs of crack or wear, replace pulley. See TIMING PULLEY SPECIFICATIONS (TURBO) table.
Measure tension pulley spring length and force. If length exceeds 3.105" (78.87 mm) or force is less than 53-57 lbs. (24-26 kg), replace spring.

TIMING PULLEY SPECIFICATIONS (TURBO)