Doosan — Valve clearance adjust procedure
Adjustments · Valve train
From a Doosan service manual covering: P158LE, P158LE-III, P180LE, P180LE-1, P180LE-II, P180LE-S, P222LE, P222LE-1, P222LE-S, PU158TI, PU180TI, PU222TI. Check it applies to your exact model before use.
Applies to: Doosan P158LE, Doosan P180LE, Doosan P180LE-II, Doosan P222LE, Doosan PU158TI, Doosan PU180TI, Doosan PU222TI, Doosan P158LE engine, Doosan P180LE-1 EASOB/QB engine, Doosan P222LE-1 EAYOB/QB engine, Doosan PU158TI EASOA/QA engine, Doosan PU180TI EASOA/QA engine
Procedure
- Turn crankshaft to bring #1 cylinder piston to compression top dead center.
- Loosen lock nuts of rocker arm adjusting screws.
- Push feeler gauge of specified value between rocker arm and valve stem.
- Adjust clearance with adjusting screw and tighten with lock nut.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake 0.3 mm cold
- Exhaust 0.4 mm cold
Full service-parts list: Doosan P158LE →, Doosan P180LE →, Doosan P222LE →
Source: Doosan 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.