Volvo Penta — Pressure-testing the cooling system
Testing & diagnosis
From a Volvo Penta service manual — check it applies to your exact model before use.
Browse Volvo Penta generators & specs →
Before you start
- Increased pressure can damage the coolant pump seal.
- Always follow valid safety regulations.
Procedure
- Remove coolant filler cap and fit cap 6433 on the radiator.
- Ensure the relief valve knob is screwed out; connect hose from tester to cap 6433 or 6441.
- Seal the drain line from the filler pipe.
- Connect tester 6662 to compressed air and open cock B.
- Increase pressure to 70 kPa; lock the knob and close cock B.
- Check for one minute that pressure does not drop; apply soapy water to find leaks.
- Remove the testing device.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Test pressure 70 kPa (10 psi); must never exceed 70 kPa
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.