Power Solutions International — Cylinder Head Bolt Installation
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
- If bolt turned less than 90 degrees, proper fastening may not be achieved. If overtightened, loosen completely and repeat from step 1.
Procedure
- Check shank length of reused bolts; replace if exceeds 99.4 mm limit.
- Apply engine oil to threads and washers.
- Using special tool Cylinder head bolt wrench (800410) tighten in sequence to 78 ± 2 N·m.
- Loosen all bolts fully in reverse order.
- Retighten to 20 ± 2 N·m in sequence.
- Make a paint mark across each bolt head and cylinder head.
- Tighten bolts 90 degrees in specified order.
- Tighten another 90 degrees and check paint marks align.
Tools required
- Cylinder head bolt wrench 800410 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Step 1: 78 ± 2 N·m
- Step 2: 20 ± 2 N·m
- Bolt shank limit: 99.4 mm
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.