Perkins — Engine Valve Lash - Inspect/Adjust (1104 engine)
Adjustments · Valve mechanism
From a Perkins service manual covering: 1103, 1103 Engine, 1104, 1104 Engine, 1104 Turbocharged Engine, SEBU7833-01. Check it applies to your exact model before use.
Applies to: Perkins 1103, Perkins 1104, Perkins 1103/1104 engine
Before you start
- To prevent possible injury, do not use the starter to turn the flywheel.
- Hot engine components can cause burns.
Procedure
- Remove the valve mechanism cover.
- Rotate crankshaft clockwise; when No. 4 inlet opened and No. 4 exhaust not closed, measure No. 1 valves.
- Loosen the valve adjustment screw locknut on adjustment screw.
- Place the appropriate feeler gauge between the rocker arm and valve.
- Turn the adjustment screw until correct valve lash is achieved.
- Tighten the locknut while holding the adjustment screw from turning.
- Repeat for No. 3, No. 4 and No. 2 cylinders per engine sequence.
- Install the valve mechanism cover.
Tools required
- feeler gauge Amazon
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)
Full service-parts list: Perkins 1103 →, Perkins 1104 →, Perkins 1103/1104 engine →
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.