21537993 Connecting Rod | Genuine Volvo Penta Part

🔧 Product Description

A forged connecting rod used in selected Volvo Penta D5 and D8 engine families. It links the piston and gudgeon pin to the crankshaft and carries the full combustion and inertia loads of the reciprocating assembly.

🚤 Compatibility

• Engine Family: TAD, D, TADH

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta forged connecting rod
• Precision-machined big-end and small-end bores
• Matched rod-cap joint for correct bearing crush
• Uses two flange screws 21544941 per rod
• Supersedes connecting rod 22571627
• Engine type: Four- or six-cylinder turbocharged common-rail diesel
• Quantity varies by assembly, most commonly six

🔌 Function

Transfers combustion force from the piston to the crankshaft while controlling piston travel through the cylinder.

⚠️ Common Signs of Failure

• Big-end bearing knock
• Bent or twisted rod
• Abnormal piston protrusion
• Cracked rod or rod cap
• Bearing failure following oil starvation or incorrect fastener torque

🛠️ Service Notes

• Return each rod to its own bore and its original orientation, with its own cap the right way round — caps are machined with their rod and are not interchangeable
• Fit new connecting rod bolts unless the manual for your engine expressly permits reuse, and follow its torque-plus-angle sequence exactly; these fasteners are stretched into place, and a reused or mis-tightened bolt is a thrown rod
• Measure the journals, the bearing shells and the rod's big-end and small-end bores against the figures in the manual for your engine, and check the rod for bend and twist before it is used
• Fit the shells clean and dry into their seats with the locating tabs home, then oil only the running faces — never scrape, shim or adjust a bearing shell
• Lubricate the bolt threads and faces only as the procedure specifies, and check the rod turns freely with the correct side clearance before moving on

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21537993 → Supersedes 22571627

OEM / Related Numbers

• 22571627 earlier number superseded by this part
• 21544941 - connecting-rod flange screw
• 21908108 - related big-end bearing kit
• 22720415 - related big-end bearing kit
• 22960905 - gudgeon pin
• 22840297 and 22937567 - related crankshaft references

📦 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 TAD570-72VE, TAD570-71VE-B
• Volvo Penta TAD840GE, TAD840-43VE
• 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 TAD850-52VE
• Volvo Penta TAD853VE
• Volvo Penta TAD870-73VE