Detroit Diesel — Remove Cylinder Head

Repair & overhaul

From a Detroit Diesel service manual — check it applies to your exact model before use.

Procedure

1. Drain the cooling system.
2. Clean and remove the valve rocker cover.
3. Remove the clevis pin securing the fuel rod to the injector rack control tube.
4. Remove the four bolts and lock washers securing the injector rack control tube assembly and remove it.
5. Disconnect the fuel pipe support clips and remove the fuel supply and return pipes.
6. Remove the two bolts securing the rocker arm shaft to the camshaft bearing caps and remove the shaft and rocker arm mechanism.
7. Remove the two exhaust valve bridges from the exhaust valve bridge guides.
8. Remove the fuel injector clamp and remove the fuel injector.
9. Remove the cylinder head water outlet elbow and tube assembly.
10. Remove the two camshaft bearing caps from the cylinder block.
11. Remove the seven special bolts and washers securing the cylinder head and remove the cylinder head assembly.
12. Attach the cylinder head to cylinder head holding fixture J 23741-A.
13. Remove seal rings or sleeve and spacer assemblies; discard used seal rings and compression gasket.
14. Drain the lubricating oil from the engine.

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.

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