21145971 Cover | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta companion oil-filter-housing cover for the D9A2L MH lubricating system. It closes a separate housing port to cover 21145970 and must remain matched to its own gasket/sealing position.

🚤 Compatibility

• Engine Family: TAD, TWD, D

Full model list at the end of this description.

⚙️ Key Features

• D9A2L MH-specific companion housing cover
• Distinct shape and port position from 21145970
• Machined sealing and bolt surfaces
• Rated for engine-oil pressure and temperature
• Cover only
• Engine type: Volvo Penta D9 marine diesel

🔌 Function

Seals the assigned oil gallery/filter-housing opening and supports the internal oil-flow path.

⚠️ Common Signs of Failure

• Oil leakage at the housing
• Cracked or warped cover
• Damaged gasket face
• Pressure loss through an incorrectly sealed port

🛠️ Service Notes

• Clean both sealing faces back to clean metal and check the cover for distortion, cracks or pulled bolt holes before refitting — a warped flange will not seal even with a new gasket
• Where the joint uses a gasket, seal or O-ring, always fit a new one and seat it dry unless the workshop manual for your engine specifies a sealant; never try to make a poor joint tight with extra sealant
• Tighten the fasteners progressively and evenly, working out from the centre, to the figure given in the manual for your engine — pressed steel, alloy and plastic covers distort easily if pulled down hard or unevenly
• If the cover carries a shaft seal or bearing, support it square to the shaft as it goes on so the seal lip is not nicked or rolled over
• Check that any breather, drain or oil return passage in the cover is clear before final tightening, and look for leaks once the engine has been run up to temperature

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21145971 → Supersedes 3812510 → Supersedes 3828029

OEM / Related Numbers

• 3812510 earlier number superseded by this part
• 3828029 earlier number superseded by this part
• Companion cover 21145970

Other-Brand OEM Numbers

• VOE21145971

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta D16C1-E MH, D16C1-F MH
• Volvo Penta D9A2L MH, D9A2M MP
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1683VE