20850096 Big-End Bearing Kit | Genuine Volvo Penta Part

🔧 Product Description

Volvo Penta lists this part as the big end bearing kit supplied inside its published overhaul kits. It appears in 2 of them: 3884935 for TAD650VE; 3884936 for TAD660VE.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD650VE
• Volvo Penta TAD660VE

• Engine Family: TAD
• Year Range: Approximately late 1990s-late 2000s

⚙️ Key Features

• Genuine Volvo Penta OEM standard big-end bearing kit
• Correct Volvo Penta part number 20850096
• Standard crankshaft journal size
• Engine type: Volvo Penta six-cylinder turbocharged industrial diesel
• Listed by Volvo Penta as the big end bearing kit in its overhaul kits
• 6 off in overhaul kit 3884935 (TAD650VE)
• 6 off in overhaul kit 3884936 (TAD660VE)
• Used in overhaul kits: 3884935 x6 (TAD650VE); 3884936 x6 (TAD660VE)

📋 Kit Contents

• Upper connecting-rod bearing shell - supplied under kit number 20850096 - quantity 1
• Lower connecting-rod bearing shell - supplied under kit number 20850096 - quantity 1
• Six kits are required for a complete six-cylinder engine

🔌 Function

The bearing shells provide the replaceable low-friction surface between the connecting rod and crankshaft journal while maintaining the specified oil clearance.

⚠️ Common Signs of Failure

• Knocking from the lower engine
• Copper or bearing material in the oil
• Crankpin scoring
• Excessive bearing clearance measured during overhaul

🛠️ Service Notes

• Fit the shells dry into clean, dry rod and cap housings with the locating tang in its notch, then oil the running face only — oil or dirt trapped behind a shell stops it bedding and carrying heat away
• Never file, scrape or dress the shells, the backs of the shells or the cap joint faces; the crush that locks a shell in place depends on those faces being untouched
• Measure the crankshaft journals and check the clearance you actually have, with a crush-type clearance gauge or a bore gauge and micrometer, against the figures in the workshop manual for your engine — a scored, worn or oval journal will destroy new shells
• Keep each pair of shells with its own rod and cap, refit caps the original way round, and read the wear pattern on the shells you removed; it usually tells you why the bearing failed
• Renew the rod bolts where the manual calls for it, tighten by the specified method and sequence, and confirm the crankshaft still turns freely by hand before going any further
• Volvo Penta's overhaul kits call for 6 off of this part

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE20850096
• Deutz / KHD: 02931578
• Kolbenschmidt: 79411600
• Kolbenschmidt component shells: 60162600
• Kolbenschmidt component shells: 60163600
• MAHLE: 099 PS 91252 000

Aftermarket / Verified Equivalents

• SLP: CRP-096
• IPSA: CR037800

📦 Condition

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