Volvo Penta — Thermostat, checking
Maintenance · Thermostat (26273)
From a Volvo Penta service manual covering: TAD530GE, TAD531GE, TAD532GE, TAD722GE, TAD730G, TAD732GE, TAD733GE, TD520GE, TD720GE, tAd731GE. Check it applies to your exact model before use.
Applies to: Volvo Penta TAD530GE, Volvo Penta TAD531GE, Volvo Penta TAD532GE, Volvo Penta TAD722GE, Volvo Penta TAD730G, Volvo Penta TAD732GE, Volvo Penta TAD733GE, Volvo Penta TD520GE, Volvo Penta TD720GE, Volvo Penta tAd731GE
Procedure
- Push the thermostat down, turn it and take it out of the thermostat housing.
- Test the thermostat function and replace if necessary.
- Push the thermostat down into the housing and turn it; the securing yoke must engage.
- Measure dimension a (starts to open) and b (completely open).
- Heat the thermostat in a water bath, stirring continuously; temperature should not rise more than 1 °C/min.
- When completely open, the difference between a and b should be at least 8 mm.
Tools required
- Water bath Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- a = starts to open 83 °C
- b = completely open 93 °C
- Completely open 95 °C
- Difference a-b: min 8 mm
Full service-parts list: Volvo Penta TAD730G →, Volvo Penta TD720GE →
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.