20799590 Tube | Genuine Volvo Penta Part

🔧 Product Description

Major engine casting used in the crankcase ventilation, oil-separator and breather-return system. It supports the cylinders, crankshaft and internal oil/coolant passages while maintaining the original structural alignment.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD750GE
• Volvo Penta TAD751GE
• Volvo Penta TAD750VE
• Volvo Penta TAD760VE

• Engine Family: TAD
• HP Range: Approximately 320 HP
• Year Range: Approximately 2000s-2010s

⚙️ Key Features

• Tube, 0.218 kg
• Crankcase ventilation, oil-separator and breather-return pipework
• Listed for 8 TAD applications

🔌 Function

Provides the primary engine structure and accurately locates the cylinders, crankshaft bearings and internal lubrication/cooling passages.

⚠️ Common Signs of Failure

• Cracks, distortion or leakage from the casting or joints
• Main-bearing or cylinder-bore misalignment
• Oil or coolant passage leakage
• Abnormal vibration or lower-engine structural movement
• Recurring bearing, gasket or sealing failure

🛠️ Service Notes

• Fit the tube so it reaches both connections without being sprung into place — a tube pulled into line loads its ends and cracks, usually at a bend or a joint
• Renew the sealing washers, O-rings or gaskets at every connection rather than reusing them, and start each union by hand so you can feel that the thread and seating face are properly engaged before tightening
• Keep the bore clean: cap or plug both ends until the moment of fitting, and never blow debris through a tube into the component it feeds
• Support the tube in its original clips and brackets — an unsupported run will fatigue from engine vibration even though it sealed perfectly when new
• Do not straighten, re-bend or patch a damaged tube; its shape is what gives the correct stress-free fit, and tighten unions only to the figure in the workshop manual for your engine

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20930510 oil separator
• 20792362 and 21038626 gaskets
• 20798824 oil-return line
• 20798831 and 20798837 attaching clamps
• 20799065 hose
• 20799616 and 20799617 breather hoses
• 20799673 hose clamp
• 20798898 retaining plate
• 20841133 inhibitor/check valve
• 20460026 seal
• 21012774; 22253980; 22393475 oil-line references
• 21496705 drain valve
• 20999126 and 22395170 leak-off/vent-line references
• 21034589 and 21033654 breather pipes

📦 Condition

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