20450737 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta o-ring used in the thermostat housing and coolant-outlet assembly. It is supplied as an individual service component under part number 20450737 and is intended to restore the original fit, alignment, sealing, support or operating function of the specified assembly. This listing supplies the named part only; adjoining components shown in an parts list for your engine are serviced separately unless explicitly stated.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta D7A-B TA
• Volvo Penta D7A-T
• Volvo Penta D7A-TA
• Volvo Penta D7C-TA
• Volvo Penta TAD720VE
• Volvo Penta TAD721GE
• Volvo Penta TAD721VE
• Volvo Penta TAD722GE
• Volvo Penta TAD722VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD520VE
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TAD, MD

⚙️ Key Features

• 0.002 kg
• For the thermostat housing and coolant-outlet joint
• Listed for 17 applications across D, TAD and MD series engines
• The larger 20450739 at 0.011 kg serves the same housing at a different seat

🔌 Function

Seals the thermostat housing and coolant-outlet joint, keeping pressurised coolant inside the circuit where the two faces meet.

⚠️ Common Signs of Failure

• Coolant seeping or dripping from the thermostat housing
• Coolant level dropping with no hose or clip obviously at fault
• Dried coolant crust or staining around the housing face
• Running hot once the joint leaks enough to drop system pressure
• Ring found hardened, squared off or nipped on removal

🛠️ Service Notes

• Two rings serve this housing - 20450737 at 0.002 kg and 20450739 at 0.011 kg - so confirm which seat you are replacing before ordering
• Clean both seats and renew the thermostat's own seal while the housing is off

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging