FUSO 4M4 – Engine – TIMING GEAR – Inspection procedure

Inspection: Tension lever
• Check the timing chain sliding surface and point of contact of the tension lever for cracking or flaking.
• Replace the tension lever if defects are evident.

•Inspection: Tension lever-to-tension lever shaft clearance
Replace the defective part(s) if the clearance exceeds the specified limit.

Inspection: Guide plate
• Check the timing chain sliding surface of the guide plate for cracking or flaking.
• Replace the guide plate if defects are evident.

•Inspection: Idler sprocket bushing-to-idler shaft clearance
Replace the bushing if the clearance exceeds the specified limit.

Replacement of idler sprocket bushing
[Removal]

[Installation]
• Place the idler gear and sprocket with its ends facing as illustrated.
• Install the bushing until sits on the chamfered end of the idler gear and sprocket.
• After installation, measure the clearance again.
• If the measurement is below the specified limit, ream the bushing.

 

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