21439808 V-Clamp | Genuine Volvo Penta Part

🔧 Product Description

A heavy-duty V-band clamp used to secure a high-temperature exhaust or turbocharger-system flange on selected Volvo Penta D16 marine engines.

🚤 Compatibility

Typically suits:

• Volvo Penta D16C-A MG
• Volvo Penta D16C-A MH
• Volvo Penta D16C-B MH
• Volvo Penta D16C-C MH
• Volvo Penta D16C-D MH

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta heavy-duty V-clamp
• Designed for D16 exhaust-system temperatures
• Provides even circumferential flange loading
• Corrosion- and heat-resistant construction
• Used with the specified flange and sealing ring
• Engine type: D16 inline-six turbocharged marine diesel

🔌 Function

Clamps the adjoining exhaust flanges together and compresses the sealing ring evenly.

⚠️ Common Signs of Failure

• Exhaust soot around the joint
• Clamp cracking or distortion
• Stripped tightening hardware
• Exhaust ticking or gas leakage
• Clamp will not retain the specified torque

🛠️ Service Notes

• Bring the two flanges squarely together before the clamp goes on — a V-clamp centres and holds a joint but cannot pull a misaligned pipe into line
• Seat the clamp evenly round the flanges and nip it up lightly, then tap around the circumference with a soft mallet so the band settles and the flanges centre before final tightening
• Tighten in stages to the figure in the workshop manual for your engine and no further; the clamp is meant to pinch the flanges while still allowing for expansion and vibration, and overtightening distorts the band or the flanges
• Renew the clamp if the band is stretched, cracked or corroded, or if the bolt, nut or trunnion is damaged — a fatigued clamp can let the joint go completely
• Recheck the clamp after the first run up to working temperature, and again at the next service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21439808 → Supersedes 21177714

OEM / Related Numbers

• 21177714 earlier number superseded by this part
• 21358019 - related gasket
• 3887844 and 3887846 - exhaust insulation
• 3801381, 3801925, 21420532 and 23564140 - related turbocharger references
• 3886542 - related V-clamp
• 1675066 - sealing ring

📦 Condition

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