21179952 Piston | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta standard-size piston for selected 4.3-litre V6 and 5.7-litre V8 gasoline engines. The piston provides the original compression height, crown profile, pin bore and ring-groove geometry.

🚤 Compatibility

• Engine Family: V
• HP Range: 200-320 HP
• Year Range: Approximately 1996-2008 gasoline-engine generation

Full model list at the end of this description.

⚙️ Key Features

• Standard-bore replacement piston
• Original compression height and crown form
• Compatible with matching connecting rod 21179974
• GM marine engine reference 10172838
• One piston supplied; rings, wrist pin and clips are separate unless packaged
• Engine type: Volvo Penta GM-based marine gasoline engine
• Quantity varies by assembly, most commonly six

🔌 Function

Seals combustion pressure, transfers force through the connecting rod and controls heat through the rings and cylinder wall.

⚠️ Common Signs of Failure

• Low compression and excessive blow-by
• Piston slap or skirt scuffing
• Broken ring lands
• Oil consumption and blue smoke
• Crown damage from detonation or overheating

🛠️ 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 Supersession Chain

• 21179952 → Supersedes 3855742

OEM / Related Numbers

• 3855742 earlier number superseded by this part
• Volvo Penta 3854173
• Connecting rod 21179974

Other-Brand OEM Numbers

• VOE21179952
• GM 10172838

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXiC-320-R, 5.7GXiCE-320-R, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GXiC-P, 5.7GXiCE-P, 5.7GXi-D, 5.7GXi-DF, 5.7GXi-E, 5.7GXi-EF, 5.7GXi-J, 5.7GXi-JF, 5.7GXiE-JF, 5.7GXiE-J, 5.7GXiE-M, 5.7GXiE-MF, 5.7GXiE-P, 5.7GXi-P, 5.7GXi-F, 5.7GXi-FF, 5.7OSXi-D, 5.7OSXi-DF, 5.7GXi-H, 5.7GXi-HF, 5.7OSi-300-J, 5.7OSi-300-JF, 5.7OSiE-300-JF, 5.7OSiE-300-J, 5.7OSi-B, 5.7OSi-BF, 5.7OSi-C, 5.7OSi-CF, 5.7OSi-E, 5.7OSi-EF, 5.7OSi-G, 5.7OSi-GF, 5.7OSXi-B, 5.7OSXi-BF, 5.7OSXi-C, 5.7OSXi-CF, 5.7OSXi-J, 5.7OSXi-JF, 5.7OSXiE-JF, 5.7OSXiE-J, 5.7OSXi-G, 5.7OSXi-GF, 5.7Gi-300-J, 5.7Gi-300-JF, 5.7GiE-300-JF, 5.7GiE-300-J, 5.7GiCE-300-M, 5.7GiE-300-N, 5.7Gi-300-N, 5.7GiCE-300-MF, 5.7GiE-300-P, 5.7Gi-300-P, 5.7Gi-300-R, 5.7GiE-300-R, 5.7Gi-C, 5.7Gi-CF, 5.7GiC-300-J, 5.7GiCE-300-J, 5.7GiCE-300-JF, 5.7GiC-300-JF, 5.7GiC-300-P, 5.7Gi-D, 5.7Gi-DF, 5.7Gi-E, 5.7Gi-EF, 5.7GXiE-N, 5.7GXi-N, 5.7GiE-300-K, 5.7GiE-300-KF, 5.7GiE-300-M, 5.7OSi-D, 5.7OSi-DF, 5.7Gi-F, 5.7Gi-FF, 5.7Gi-G, 5.7Gi-GF, 5.7GL-A, 5.7GL-B, 5.7GL-C, 5.7GL-D, 5.7GL-E, 5.7GiCE-300-P, 5.7GiC-300-R, 5.7GiCE-300-R, 4.3OSi-GF, 4.3OSi-J, 4.3OSi-JF, 4.3Gi-200-R, 4.3GL-E, 4.3GL-EF, 4.3GL-G, 4.3GL-GF, 4.3GL-J, 4.3GL-JF, 4.3GL-P, 4.3GXi-225-R, 4.3GXiE-225-R, 4.3GXiE-M, 4.3GXi-P, 4.3GXiE-P, 4.3GXi-Q, 4.3GXiE-Q, 4.3GXi-F, 4.3GXi-FF, 4.3GXi-G, 4.3GXi-GF, 4.3GXi-J, 4.3GXi-JF, 4.3OSi-F, 4.3OSi-FF, 4.3OSi-G
• Volvo Penta V8-300-A, V8-300-E-A, V8-300-B, V8-300-E-B, V8-300-C-A, V8-300-CE-A, V8-300-C-B, V8-320-C-B, V8-320-CE-B, V8-300-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-C-A, V8-320-CE-A, V8-225-C-A, V8-225-CE-A, V8-225-C-B, V8-225-CE-B
• Volvo Penta V6-200-A, V6-225-A, V6-225-E-A