21665940 Stud | Genuine Volvo Penta Part

🔧 Product Description

A genuine threaded stud used in a Volvo Penta TAD550GE / TAD750-series engine assembly. It provides permanent thread engagement in the base component while allowing the adjoining flange or bracket to be retained by a nut.

🚤 Compatibility

Typically suits:

• Volvo Penta V8-380-CE-A
• Volvo Penta V8-380-C-B
• Volvo Penta V8-380-CE-B
• Volvo Penta V8-380-C-D
• Volvo Penta V8-380-CE-D
• Volvo Penta V8-430-CE-D
• Volvo Penta V8-350-C-D
• Volvo Penta V8-350-CE-D
• Volvo Penta V8-380-C-A

• Engine Family: V
• HP Range: 350-430 HP
• Year Range: Approximately 2008 - 2020

⚙️ Key Features

• Genuine Volvo Penta mounting stud
• Factory thread at both ends
• Correct installed projection for the joint
• Designed for engine heat and vibration
• Position-specific replacement fastener
• Engine type: 5.1L inline four-cylinder or 7.15L inline six-cylinder turbocharged generator diesel
• 6 used per assembly

🔌 Function

Provides the fixed threaded mounting point and specified clamping geometry for the assigned component.

⚠️ Common Signs of Failure

• Stripped or corroded threads
• Stud loosening from the base component
• Stretching or cracking
• Incorrect installed height
• Repeated joint leakage or bracket movement

🛠️ Service Notes

• Clean and chase the female thread before fitting so the stud can pull down square and to full depth
• Screw studs in with a proper stud installer or the double-nut method; gripping the plain shank with pliers or self-grips scores it and the nut will never seat or torque correctly afterwards
• Screw the stud home until it seats as the manual for your engine describes, and no further — a stud wound in hard to cure a slack thread will simply split the casting
• Renew studs that are stretched, necked, bent or corroded rather than reusing them; exhaust and manifold studs in particular are cheap next to the work of extracting a broken one
• Tighten the nuts to the torque figures and in the sequence given in the workshop manual for your engine, and where a stud passes into an oil or coolant space seal it as the manual specifies

📦 Condition

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