Volvo Penta — Sleeve thermostat, changing
Repair & overhaul
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Do not loosen the fuel pipes.
- Fit the sealing ring with the sealing lip downwards.
- Apply soapy water to the sealing rings.
Procedure
- Remove the fuel filter bracket from the thermostat housing cover; do not loosen the fuel pipes.
- Remove the clamp and the oil cooler pipe if fitted, and remove the sealing ring.
- Remove the bolts for the thermostat housing cover.
- Lift up the cover approx. 20 mm and turn it carefully until it loosens from the coolant distributor pipe.
- Remove the sleeve thermostat.
- Fit a new thermostat and new sealing rings.
- Fit the cover on the coolant distributor pipe and attach it to the thermostat housing.
- Fit the oil cooler pipe and the fuel leak-off pipe if loosened, and attach the fuel filter bracket.
Tools required
- 6863 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.