Volvo Penta — Main bearings, changing all

Repair & overhaul

From a Volvo Penta service manual — check it applies to your exact model before use.

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Procedure

1. Fit turning tool 9993590.
2. Remove oil suction pipe and oil delivery pipe.
3. Remove one main bearing cap at a time.
4. Remove upper bearing shell using dowel in crankshaft oil hole.
5. Clean and inspect bearing seat, cap, journal and shells.
6. Oil journal and new bearing shells.
7. Fit upper bearing shell by rotating crankshaft with dowel.
8. Fit main bearing cap with lower shell, tighten stage 1 150+20 Nm.
9. Angle tighten stage 2 to 120°+5°.
10. Change other main bearings one at a time.
11. Check crankshaft does not bind.
12. Check axial clearance and replace axial bearing washers if needed.
13. Fit oil suction and delivery pipes.
14. Remove turning tool 9993590 and refit covers.

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.

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