Perkins — To select the correct thickness of cylinder head gasket
Adjustments
From a Perkins service manual covering: 403C-11, 403C-15, 404C-22. Check it applies to your exact model before use.
Applies to: Perkins 403C-11, Perkins 403C-15, Perkins 404C-22
Before you start
- If the correct piston height above or below the cylinder block is not obtained, damage to the engine can occur.
Procedure
- Put the piston height tool (A) on the face of the cylinder block and rotate the gauge dial to the zero position.
- Rotate the crankshaft until the piston crown is approximately at top dead centre (TDC).
- Carefully put the tool over the top of the piston with the plunger of the gauge in contact with the piston above the axis of the gudgeon pin.
- Rotate the crankshaft to ensure that the piston is at the highest position and make a note of the gauge indication.
Tools required
- Piston height tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- The difference between the highest and the lowest piston height must not exceed 0.1 mm.
Full service-parts list: Perkins 403C-11 →, Perkins 403C-15 →, Perkins 404C-22 →
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.