20405843 Gasket | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta one-piece gasket fitted between the engine crankcase and oil pan 11700301 on TAD530GE, TAD531GE and TAD532GE engines. It seals the full sump flange and must be installed on clean, flat mating surfaces.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta TD520GE
• Volvo Penta TD520VE
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD520GE
• Volvo Penta TAD520VE
• Volvo Penta TAD530GE MECH
• Volvo Penta TAD530GE EDC4
• Volvo Penta TAD531GE MECH
• Volvo Penta TAD531GE EDC4
• Volvo Penta TAD532GE EDC4
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TD, TAD, MD

⚙️ Key Features

• Full-perimeter sump gasket
• Confirmed with oil pan 11700301
• Resistant to hot engine oil and crankcase vapour
• Used in the same lubricating-system arrangement as oil filter 3831236
• All oil-pan screws must be tightened in the specified sequence
• Engine type: Volvo Penta 5-litre four-cylinder industrial diesel

🔌 Function

Seals the joint between the crankcase and oil pan to retain engine oil and prevent dirt entering the sump.

⚠️ Common Signs of Failure

• Oil seepage around the sump flange
• Oil level falling without another visible leak
• Gasket extrusion or tearing
• Corroded or distorted oil-pan flange
• Leak recurring after incorrect screw tightening

🛠️ Service Notes

• Fit a new gasket every time the joint is disturbed — a gasket takes a permanent set once it has been torqued and will not seal reliably a second time
• Scrape both faces back to clean bare metal, keeping the blade at a shallow angle so it lifts the old material without gouging the surface, and use a plastic scraper on aluminium castings
• Check the faces for flatness, cracks and corrosion pitting, and make sure no old gasket, carbon or hardened sealant is left in the corners or around the bolt holes
• Fit the gasket dry unless the workshop manual for your engine calls for a sealant, and then only the type it specifies — surplus sealant squeezes out into oil, coolant and fuel passages
• Draw the fasteners down progressively in the sequence and to the torque given in the manual for your engine, and recheck after the first heat cycle where the manual asks for it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20405843 → Supersedes 11700305

OEM / Related Numbers

• 11700305 earlier number superseded by this part
• 11700301 - oil pan
• 20405792 - oil-pan flange screws
• 3831236 - related oil filter
• 11998 - related sealing gaskets

Aftermarket / Verified Equivalents

• Olsson Parts: 46851

📦 Condition

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