Perkins — Inlet and Exhaust Valve Springs - Remove and Install
Repair & overhaul
From a Perkins service manual — check it applies to your exact model before use.
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Before you start
- Personal injury can result from being struck by parts propelled by a released spring force. Wear all necessary protective equipment.
- Do not turn the crankshaft while the valve springs are removed.
- Plug the apertures for the push rods in the cylinder head in order to prevent the entry of loose parts into the engine.
Procedure
- Remove the electronic unit injectors.
- Use Tooling (A) to position the appropriate piston at top center before the valve spring is removed.
- Position electronic unit injector clamp (1) on Tooling (B); install Tooling (B) into the injector sleeve; tighten the bolt to secure Tooling (B).
- Tighten the nut on Tooling (B) until valve keepers (3) are loose on valves (2).
- Remove valve keepers (3).
- Loosen the nut to release pressure; remove clamp (1) and Tooling (B).
- Remove valve rotators (4).
- Remove outer valve springs (5) and inner valve springs (6).
- Remove spring seats (7) from the valve guides.
- If necessary, remove valve stem seals (8).
- Inspect the valve springs for damage and correct length.
- Lubricate the valve stems with clean engine oil.
- If necessary, install new valve stem seals (8).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Valve springs must be replaced in pairs for the inlet valves or the exhaust valves of each cylinder
- Cylinder pairs: 1 with 6, 2 with 5, 3 with 4
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.