Genuine GM Coolant Cap Housing Seal 12690764 – Suits Holden Commodore VE/VF 3.6L Alloytec & SIDI V6

Genuine GM Coolant Cap Housing Seal 12690764 is the factory-engineered seal used on the engine-mounted coolant filler neck assembly found on GM 3.6L Alloytec and SIDI V6 engines. This seal sits beneath the coolant pressure cap housing and provides a critical barrier to prevent coolant seepage and maintain proper system pressure.

Over time, heat cycling and pressure fluctuations can cause the original seal to harden or lose tension, leading to coolant leaks or loss of system pressure. Replacing this seal with a Genuine GM component ensures correct fitment, long-term durability, and factory-level performance of your cooling system.

Fitment:

• Holden Commodore VE / VF (3.6L Alloytec & SIDI V6)
• Holden Calais VE / VF (3.6L Alloytec & SIDI V6)
• Holden Caprice WM / WN (3.6L Alloytec & SIDI V6)
• Holden Statesman WM (3.6L Alloytec V6)
• Holden Captiva (3.6L Alloytec / SIDI V6 – LE0, LY7, LLT, LFX)

Specifications:

• OEM Part Number: 12690764
• Application: Radiator cap housing / coolant filler neck on engine block
• Material: High-temperature, coolant-resistant elastomer
• Function: Seals coolant filler housing to prevent leaks and pressure loss
• Engine Family: GM 3.6L Alloytec / SIDI V6 (LE0, LY7, LLT, LFX)

Key Features:

• Genuine GM OEM part – precise fit and reliable sealing
• Prevents coolant loss at the filler neck assembly
• Maintains system pressure for optimal cooling efficiency
• Resists heat, pressure, and coolant degradation over time
• Essential when reassembling the engine-mounted coolant cap housing

Installation Tip: Inspect the coolant cap housing and mating surface for debris or corrosion. Clean thoroughly before installing the new seal, and avoid over-tightening the filler neck bolts to prevent seal distortion.