21518407 Adapter | Genuine Volvo Penta Part

🔧 Product Description

A genuine adapter used in the crankcase-ventilation separator assembly on selected Volvo Penta diesel engines. It connects the separator plumbing to the adjoining flange or hose arrangement and works with sealing ring 21532258 to maintain a closed, leak-free ventilation path.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1351-53VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta crankcase-ventilation adapter
• Used with the specified separator and flange assembly
• Maintains vapour-flow alignment and sealing
• Designed for hot oil-mist and crankcase-vapour exposure
• Direct replacement for a cracked, loose or damaged original adapter
• Engine type: Turbocharged Volvo Penta marine or industrial diesel

🔌 Function

Connects the crankcase-ventilation separator to the associated pipe, flange or hose so oil mist can be separated and crankcase vapour routed through the designed closed system.

⚠️ Common Signs of Failure

• Oil mist or vapour leakage around the adapter
• Crankcase-ventilation hose becoming loose
• Oil residue around the separator assembly
• Cracking or distortion of the adapter
• Seal failure causing an air leak or poor separator performance

🛠️ Service Notes

• Check the adapter against both of the parts it has to join before fitting — adapters are specific to an engine and its variant, and one that is close but not correct will not seat or seal properly
• Clean and inspect both mating faces or connector ends; grit, old sealant or corrosion on one side is the usual reason an adapted joint leaks or works intermittently
• Renew any O-ring, gasket or sealing washer belonging to the joint rather than reusing the old one, and lubricate rubber seals lightly so they slide into place instead of rolling or nipping
• Tighten threaded adapters to the figure given in the workshop manual for that connection; many go into aluminium or onto a soft seat and will distort if pulled up hard
• Where the adapter is a workshop tool, check it for thread wear and damage before use and never modify it to make something fit

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21373007 - crankcase ventilation separator
• 22877307 - later / alternate separator used in the related assembly
• 20532891 - separator gasket
• 21815753 - ventilation pipe
• 943717 - hose clamp
• 21532258 - sealing ring
• 3849250 - flange
• 21078879 - hose clamp

📦 Condition

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