11996307 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta O-ring for the fuel system, used to form a leak-tight seal at a fuel-side joint on the engine. It is supplied as an individual sealing ring and is also included in the small parts kit for the applicable engines. Correct replacement of this seal is essential whenever a fuel connection or component it seals is disturbed during service.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1230ME
• Volvo Penta TAMD71B
• Volvo Penta TD164KAE
• Volvo Penta TAMD75P-A
• Volvo Penta TAMD72P-A
• Volvo Penta TAMD72WJ-A
• Volvo Penta TAMD73P-A
• Volvo Penta TAMD73WJ-A
• Volvo Penta TAMD74P-A
• Volvo Penta TAMD74P-B
• Volvo Penta TAMD74A
• Volvo Penta TAMD74C-A
• Volvo Penta TAMD74C-B
• Volvo Penta TAMD74L-A
• Volvo Penta TAMD74L-B
• Volvo Penta TAMD163P-A
• Volvo Penta TAMD165A
• Volvo Penta TAMD165C
• Volvo Penta TAMD165P

• Engine Family: TWD, TAMD, TD
• HP Range: Approximately 270-610 HP
• Year Range: Approximately 1980s - 2000s

⚙️ Key Features

• OEM Volvo Penta part number 11996307
• System group: Fuel System
• Included in the small parts kit
• Net weight approximately 0.002 kg
• Fits TAMD, TWD and TD series marine diesel engines
• 6 used per assembly

📋 Kit Contents

• Included in small parts kit.

🔌 Function

The O-ring seals the mating faces of a fuel system connection to prevent fuel leakage and air ingress. Maintaining this seal keeps fuel delivery pressure stable and protects the system from contamination.

⚠️ Common Signs of Failure

• Visible fuel weeping or staining around the joint it seals
• Hardening, flattening or cracking of the rubber on removal
• Air drawn into the fuel system causing rough running, hard starting or stalling
• Loss of fuel pressure or repeated need to bleed the system
• Swollen or distorted ring that no longer seats correctly in its groove

🛠️ Service Notes

• Always fit a new O-ring — never refit one that has been removed, as it has already taken a set in its groove
• Clean the groove and both sealing faces and check them for nicks, scoring and corrosion pitting; a damaged groove will leak however good the new seal is
• Smear the ring with a little clean lubricant compatible with the fluid it seals, then roll it into place by hand so it sits untwisted and fully in its groove
• Never lever an O-ring over a sharp edge or thread with a screwdriver; use a blunt plastic tool and protect any edge the ring has to pass
• Assemble the joint squarely and tighten to the figure and sequence given in the workshop manual for your engine — over-tightening extrudes the ring and causes the very leak you were curing

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 11996309 related overflow valve
• 11998401 related small parts kit
• 862402 related injection-pump O-ring
• 862423 related injection-pump O-ring
• 3825500 related governor
• 3826196 related injection pump

📦 Condition

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