Power Solutions International — Inspect and adjust valve lash (valve clearance)
Adjustments · Rocker arm
From a Power Solutions International service manual — check it applies to your exact model before use.
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Before you start
- Measure and adjust while the engine is cold
Procedure
- Measure and adjust while the engine is cold
- Rotate crankshaft until phase pointer points at 0 tick on phase plate
- Confirm 0 tick of crankshaft timing gear engaged with 0 tick of camshaft gear
- Adjust valve clearance of No. 1-2-3-6 rocker from the front end
- Intake: insert a 0.2mm plug gauge, tighten nuts to 20±5Nm, pull out gauge
- Check with a 0.25mm plug gauge (must not get through)
- Exhaust: insert a 0.3mm plug gauge, tighten nuts to 20±5 N∙m, pull out gauge
- Check with a 0.35mm plug gauge (must not get through)
- Rotate crankshaft until phase pointer at 0 tick and camshaft gear 0 tick at 180°
- Adjust valve clearance of No. 4-5-7-8 rocker, same method
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake 0.2mm gauge pull-out / 0.25mm no-go
- Exhaust 0.3mm gauge pull-out / 0.35mm no-go
- Nuts torque 20±5 N∙m
Source: Power Solutions International service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.