21908101 Thrust Washer Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta standard grade B crankshaft thrust-washer set for D8 and related D5/D8 engine architecture. The matched washers control crankshaft end float at the designated main-bearing position. Standard grades A and B are selective-fit parts; oversize grades are repair components and must only be installed after crankshaft and block measurements confirm the required thickness.

🚤 Compatibility

• Engine Family: TAD, D, TADH
• Year Range: Approximately mid-2000s onward; exact grade is determined by engine specification and measured end float

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta OEM crankshaft thrust-washer kit
• Correct Volvo Penta part number 21908101
• Machining / selection grade: standard grade B
• Matched thrust surfaces for one crankshaft location
• Selection must be based on measured crankshaft end float

📋 Kit Contents

• Matched crankshaft thrust-washer halves - supplied under kit number 21908101 - quantity 2
• Individual washer halves are not assigned separate Volvo service numbers and are supplied only as kit 21908101

🔌 Function

The washers absorb forward and rearward crankshaft thrust loads and maintain the specified axial clearance. Correct clearance protects the crankshaft, main-bearing housing, gears and transmission coupling.

⚠️ Common Signs of Failure

• Crankshaft end float exceeds specification
• Clunk or movement when engine load direction changes
• Thrust faces worn, scored or heat-discoloured
• Crankshaft flange or main-bearing housing damaged
• Incorrect standard or repair grade selected without measurement

🛠️ Service Notes

• Grade letters and oversize measurements identify different thrust thicknesses, not quality levels.
• Do not mix washers from different kits.
• Confirm crankshaft end float with Volvo Penta workshop specifications before installation.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21908099 standard grade A
• 21939706 0.15mm oversize
• 21939708 0.30mm oversize

Other-Brand OEM Numbers

• VOE21908101
• Kolbenschmidt: 79553600
• Kolbenschmidt component references: 36315600
• Kolbenschmidt component references: 36316600

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
• Volvo Penta TAD840GE, TAD840-43VE, TAD840GE-B
• Volvo Penta TAD570-72VE, TAD570-71VE-B
• Volvo Penta TAD880-82GE, TAD880-84VE
• Volvo Penta TADH880-82GE, TADH880-84VE
• Volvo Penta TAD540-42VE
• Volvo Penta TAD550-51VE
• Volvo Penta TAD552VE
• Volvo Penta TAD580-83VE
• Volvo Penta TAD841-43GE
• Volvo Penta TAD850-52VE
• Volvo Penta TAD851-53GE
• Volvo Penta TAD853VE
• Volvo Penta TAD870-73VE