21344812 Stud | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D12 / TAD12 Cylinder-Head Stud - Part Number: 21344812

Genuine Volvo Penta cylinder-head stud used with the position-specific head bolts on D12/TAD12 engines. The stud provides accurate head location and controlled thread engagement and must be installed to the specified protrusion before the head is torqued.

⚙️ Key Features

• Genuine Volvo Penta engine fastener

• Position-specific thread, length and strength class

• Correct head form for access and clamp load

• Use the specified torque, tightening order and locking method

• Replace if stretched, damaged or identified as single-use

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21344812 (current listed OEM reference)

OEM / Related Numbers:

• 23134313 / 3803666 - cylinder-head references

• 21344752 - 106 mm flange screw

• 21344776 - 127 mm flange screw

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D12/TAD12 cylinder-head assembly

Typically suits:

• Engine models:

• D12D-A MG

• TAD1240GE

• TAD1250VE

• TAD1251VE

• TAD1252VE

• Serial / Specification Control: Cylinder-head casting, stud position, installation height and engine serial number control fitment.

• HP Range: Engine-rating dependent

• Engine Type: Volvo Penta D12 inline-six heavy-duty diesel

• Year Range: D12D/TAD12 production; head and serial controlled

🔌 Function

Applies and maintains the specified clamp load at its assigned engine joint so alignment, sealing and structural integrity are retained.

Common signs of failure:

• Damaged or stretched threads

• Rounded, cracked or corroded head

• Loss of specified clamp load or repeated loosening

• Incorrect length or strength class found during service

• Evidence of fretting, movement or leakage at the retained joint

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging