Volvo Penta — Fitting the cylinder heads
Installation
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Do not clean phosphated cylinder head bolts with a wire brush
- Replace bolts with cutting marks under the heads or in the threads
Procedure
- Clean the cylinder block face and remove rust and carbon from the bolt holes and threads.
- Check the cylinder liner height.
- Fit the sealing rings and new cylinder head gaskets.
- Place the cylinder heads on the block and check the cylinder head bolts.
- Immerse the bolts completely in rust-proofing agent 282036; they must be drip-free at assembly.
- 100-series: tighten in stages to 20, 100, 200, 320 Nm; 120-series: 50, 150, 190 Nm.
- Angle-tighten according to the tightening sequence.
- Fit push rods and rocker arm mechanism, adjust the valves and fit the rocker arm casings.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 100-series 20 / 100 / 200 / 320 Nm then angle-tighten 90 degrees
- 120-series 50 / 150 / 190 Nm then angle-tighten
Source: Volvo Penta 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.