20440781 Piston | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta precision component used in the lubricating-oil filter-housing control valve on D13 and related heavy-duty engines. Moves within the oil-filter housing to control bypass or regulated oil flow.

🚤 Compatibility

• Engine Family: TAD, D, TWD

Full model list at the end of this description.

⚙️ Key Features

• Precision-machined oil-pressure control component
• Installed in the oil-filter housing valve bore
• Works with compression spring 20464676
• Used with O-ring 977004 and related plugs
• Requires an unscored bore and clean engine oil
• Engine type: Volvo Penta 13-litre diesel

🔌 Function

Moves within the oil-filter housing to control bypass or regulated oil flow.

⚠️ Common Signs of Failure

• Oil-filter bypass fault
• Component sticking from sludge
• Scoring or wear
• Bearing damage from incorrect oil regulation

🛠️ Service Notes

• Measure the bore or liner and check it against the piston, using the size and class markings and the tolerances given in the workshop manual for your engine; pistons and bores are matched, and a worn bore needs attention before a new piston goes in
• Fit rings with the marked face up and the gaps staggered as the manual specifies, use a proper ring compressor, and oil the piston, rings and bore before entering them
• Observe the orientation markings on the piston and the pairing marks between piston and connecting rod so each assembly goes back in its own cylinder the right way round
• Use new pin retaining clips or circlips, check the pin fit and the rod bearing shells, and confirm the piston moves freely on the pin as the manual describes
• Where the manual calls for a piston protrusion or crown height check to select the gasket, carry it out before final assembly; then turn the engine over by hand to confirm free movement before starting

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 3889676 - related oil-filter housing
• 20464676 - compression spring
• 977004 - O-ring
• 20903074 - related thermostat
• 20478143 - cap plug

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D16C-A MG, D16C-A MH, D16C-B MH, D16C-C MH, D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C-D MH, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C1-A MH, D13C2-A MH, D13C2-A MG, D13C1-A MG
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
• Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
• Volvo Penta D9A2L MH, D9A2A
• Volvo Penta TAD1342VE, TAD1342GE
• Volvo Penta TAD1343VE, TAD1343GE
• Volvo Penta TAD1345GE, TAD1345VE
• Volvo Penta TAD1350GE, TAD1350VE
• Volvo Penta TAD1351GE, TAD1351-53VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD940GE, TAD940VE
• Volvo Penta TAD941VE, TAD941GE
• Volvo Penta TWD1683GE-B, TWD1683VE
• Volvo Penta TAD1140-42VE
• Volvo Penta TAD1150-52VE
• Volvo Penta TAD1170-72VE
• Volvo Penta TAD1340VE
• Volvo Penta TAD1352GE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1354GE
• Volvo Penta TAD1355GE
• Volvo Penta TAD1360-62VE
• Volvo Penta TAD1363-65VE
• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TAD942VE
• Volvo Penta TAD943VE
• Volvo Penta TAD950VE
• Volvo Penta TAD951VE
• Volvo Penta TAD952VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1744GE