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Lexus GS 400 V8-4.0L (1UZ-FE) (1999)03 · Maintenance
03 · Maintenance

Timing Belt: Diagrams (page 12 of 19)

Make
Lexus
Model
GS 400
Engine
V8-4.0L (1UZ-FE)
Year
1999
Section
Timing Belt
MaintenanceDiagrams · page 12 of 19
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2. INSPECT IDLER PULLEYS

a. Visually check the seal portion of the idler pulley for oil leakage.

If leakage is found, replace the idler pulley.

b. Check that the idler pulley turns smoothly.

If necessary, replace the idler pulley.

3. INSPECT TIMING BELT TENSIONER

a. Visually check the seal portion of the tensioner for oil leakage.

HINT:  If there is only the faintest trace of oil on the seal on the pushrod side, the tensioner is all right.

If leakage is found, replace the tensioner.

b. Hold the tensioner with both hands and push the push rod strongly as shown to check that it doesn't move.

If the push rod moves, replace the tensioner.

NOTICE:  Never hold the tensioner push rod facing downward.

c. Measure the protrusion of the push rod from the housing end.

Protrusion: 10.5 - 11.5 mm (0.413 - 0.453 inch)
If the protrusion is not as specified, replace the tensioner.

4. INSPECT WATER PUMP

INSTALLATION

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Parts & tools for this job For 1999 Lexus GS 4.0L

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