Power Solutions International — Steps to assemble cylinder head
Repair & overhaul
From a Power Solutions International service manual — check it applies to your exact model before use.
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Before you start
- Alignment of cylinder heads must be completed after installing intake pipe to prevent coolant leaks
Procedure
- Insert the seal valve into the valve guide pipe
- Install intake valve and exhaust valve onto the cylinder head
- Install new cylinder head gaskets; gaskets cannot be reused
- Assemble cylinder head to the engine block
- Thread cylinder head bolts into the cylinder head
- Leave the four cylinder heads loose until intake pipe installed
- Align and level four cylinder heads with intake pipe, coplanarity < 0.07mm
- Tighten cylinder head bolts after alignment
- Bar engine over three complete rotations before starting after new cylinder heads
Specs & values
- Coplanarity requirement < 0.07mm, theoretical value ≯ 0.10mm
- Cylinder head bolt tightening sequence 3-2-4-1
- Tighten per bolt pre-tightening order in Figure 18
Source: Power Solutions International 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.