Perkins — Cylinder head assembly - to fit
Repair & overhaul
From a Perkins service manual — check it applies to your exact model before use.
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Before you start
- It is not necessary to tighten the cylinder head setscrews again with the engine hot or after a limited period in service.
Procedure
- Clean the bottom face of the cylinder head and top face of the block; ensure no debris in the cylinder bores.
- Put the cylinder head gasket in position without jointing compound; it is stamped FRONT TOP.
- Fit two suitable 1/2 UNF studs in positions 15 and 26 (B) or 25 and 30 (A) to hold the gasket.
- Put the cylinder head in position and engage setscrews in their correct positions.
- Gradually and evenly tighten the setscrews to 110 Nm (80 lbf ft) 11,1 kgf m in the sequence shown.
- Repeat to ensure all the setscrews are tightened to the correct torque.
- Turn short setscrews a further 150 deg, medium 180 deg, long 210 deg in the correct sequence.
- Put the push rods in position ensuring correct fit in the tappet sockets.
- Fit the rocker assembly and set the valve tip clearances.
- Fit the atomisers and the high-pressure pipes; tighten connection nuts to 18 Nm (14 lbf ft) 1,9 kgf m.
- Fit the manifolds and turbocharger; fill the cooling system and eliminate air from the fuel system.
Tools required
- Angle gauge MS.1531 to tighten cylinder head setscrews Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 110 Nm (80 lbf ft) 11,1 kgf m
- High-pressure fuel pipes 18 Nm (14 lbf ft) 1,9 kgf m
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.