Detroit Diesel — Remove Exhaust Valve Spring (Cylinder Head Installed)
Repair & overhaul · Exhaust Valves
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Keep hands and clothing away from the engine when barring over or bumping the starter.
Procedure
- Clean and remove the valve rocker cover and discard the gaskets.
- Rotate the crankshaft with tool J 22582 to bring the valve and injector rocker arms in line horizontally.
- Disconnect and remove the fuel pipes from the injector and the fuel connectors.
- Remove the two bolts holding the rocker arm shaft to the camshaft bearing cap and remove the rocker arms and shaft.
- Remove the exhaust valve bridges.
- Remove the cylinder block air box cover and turn the crankshaft until the piston is at the top of its stroke.
- Thread the valve spring compressor J 22693-01 into the tapped hole in the cylinder head; compress the spring and remove the two-piece valve lock.
- Release the tool and remove the spring cap, valve spring and spring seat.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Detroit Diesel 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.