Perkins 1103 / 1104 — Engine Valve Lash - Inspect/Adjust
Adjustments · Valve Mechanism
For the Perkins 1103 / 1104, from the Perkins service manual.
Applies to: Perkins 1103, Perkins 1104, Perkins 1104 (1103 also covered) engine
Before you start
- To prevent possible injury, do not use the starter to turn the flywheel.
- Hot engine components can cause burns; allow the engine to cool before measuring valve clearance.
- To prevent accidental starting, turn the ignition switch to OFF, place a do not operate tag and disconnect and tape the stop solenoid electrical connection.
Procedure
- Put No. 1 piston at top center on the compression stroke.
- 1104: with TC compression stroke adjust inlet valves 1,2 and exhaust valves 1,3 to 0.20 mm and 0.45 mm.
- Lightly tap the rocker arm at the adjustment screw with a soft mallet; loosen the adjustment locknut.
- Place the correct feeler gauge between the rocker arm and valve stem and turn the adjustment screw clockwise until slight drag is felt.
- Tighten the adjustment locknut to 27 N·m (20 lb ft) without turning the adjustment screw; recheck valve lash.
- Rotate the engine 360 degrees to TC exhaust stroke for cylinder 4.
- 1104: adjust inlet valves 3,4 and exhaust valves 2,4. 1103: adjust the number 1, 5, 2 and 4 valves.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Inlet valve lash 0.20 mm (0.008 inch).
- Exhaust valve lash 0.45 mm (0.018 inch).
- Adjustment locknut torque 27 N·m (20 lb ft).
Full service-parts list: Perkins 1103 →, Perkins 1104 →
Source: Perkins 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.