Perkins — Cylinder Head - Inspect
Maintenance
From a Perkins service manual covering: 402D-05, 403D-07, 403D-11, 403D-15, 404D-22, 404D-22T, 404D-22TA. Check it applies to your exact model before use.
Applies to: Perkins 402D-05, Perkins 403D-07, Perkins 403D-11, Perkins 403D-15, Perkins 404D-22, Perkins 404D-22T, Perkins 404D-22TA
Procedure
- Remove the bolts in the cylinder head in the reverse sequence shown; remove the cylinder head.
- Clean the cylinder head thoroughly; ensure the contact surfaces are clean, smooth, and flat.
- Inspect the bottom surface for pitting, corrosion, and cracks; inspect around the valve seats and injector holes.
- Put the cylinder head on suitable supports.
- Use a straight edge and a feeler gauge to check the six positions of the cylinder head for distortion.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Perkins 402D-05 →, Perkins 403D-07 →, Perkins 403D-11 →, Perkins 403D-15 →, Perkins 404D-22 →, Perkins 404D-22T →, Perkins 404D-22TA →
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.