21579162 Snap Ring | Genuine Volvo Penta Part

🔧 Product Description

Hardened internal retaining ring that locates the bearing assembly inside the D13 belt-driven seawater pump housing.

🚤 Compatibility

Typically suits:

• Volvo Penta D13B-E MG
• Volvo Penta D13B-E MG (FE)
• Volvo Penta D13B-E MH
• Volvo Penta D13B-E MH (FE)
• Volvo Penta D13B-F MG
• Volvo Penta D13B-F MG (FE)
• Volvo Penta D13B-N MH
• Volvo Penta D13B-N MH (FE)
• Volvo Penta D13C1-A MH
• Volvo Penta D13C2-A MH
• Volvo Penta D13C1-B MG
• Volvo Penta D13C3-B MG
• Volvo Penta D13C2-A MG
• Volvo Penta D13C1-A MG
• Volvo Penta D13C3-B MH
• Volvo Penta D13C1-B MH

• Engine Family: D

⚙️ Key Features

• Correct groove diameter and spring tension
• Retains the pump bearing axially
• Used with bearing housing 21579156
• Part of pump 21347696
• Replace if distorted during removal
• Engine type: 12.8-litre inline-six turbocharged marine diesel

🔌 Function

Locks the bearing assembly in its machined groove and prevents axial movement.

⚠️ Common Signs of Failure

• Grinding, rumbling or squealing from the pump
• Pulley wobble or excessive shaft play
• Repeated shaft-seal leakage
• Axial movement or component walking out of position
• Seized pump, low seawater flow or thrown drive belt

🛠️ Service Notes

• Always fit a new snap ring rather than reusing the one you removed — a ring that has been sprung open once has lost tension
• Use proper snap-ring pliers and open the ring no further than it needs to go; overstretching it, or levering it in with a screwdriver, leaves it slack in the groove
• Clean the groove and check it for wear, burrs or spread before fitting, and make sure the ring snaps fully home right the way round — check it by eye, turning the assembly, not just by feel
• Where the ring has a chamfered or dished face, fit it the right way up with the sharp edge against the load
• Account for the old ring and any fragments; a piece of broken circlip left inside a gearcase or housing will do serious damage

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE21579162

Aftermarket / Verified Equivalents

• Seawater pump: 21347696
• Repair kit: 21911061

📦 Condition

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