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Chevrolet Lumina V6-204 3.4L DOHC (1991)03 · Maintenance
03 · Maintenance

Timing Belt: Diagrams (page 3 of 3)

Make
Chevrolet
Model
Lumina
Engine
V6-204 3.4L DOHC
Year
1991
Section
Timing Belt
MaintenanceDiagrams · page 3 of 3
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(Figure 2) Actuator Measurement (Method "A")

(Figure 3) Actuator Measurement (Method "B")

INSPECTION

Inspect belt teeth and back side of belt for cracks, tears or other damage. Also note any evidence of oil or other fluid contaminates. Replace the
belt if any of these conditions are found (figure 1). Overall belt width below 32 mm (1.26 inch) indicates a side wear condition.

Verify if camshaft belt length is within specification using one of the following methods:

Method A
a. Insert a flat, narrow 0.5 mm (0.02 inch thick), ruler along the tensioner pulley and engage the steps in the tensioner base and note the reading at

the top of the tensioner pulley (figure 2).

b. If reading is 41.1 ± 1.5 mm (1.62 ± 0.06 inch), belt is in acceptable range.
c. If reading is 45.1 ± 1.75 mm (1.77 ± 0.07 inch), belt is to be replaced.

Method B
a. Measure the actuator from the centerline of the trunnion to the end of the rubber boot (figure 3).
b. If the measurement is from 80.5 mm (3.2 inch) to 94 mm (3.7 inch) for a USED belt, the belt is in the ACCEPTABLE range.
c. If the measurement is over 94 mm (3.7 inch) for a USED belt, the belt is to be REPLACED.

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Parts & tools for this job For 1991 Chevrolet Lumina 3.4L

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