The Nissan Skyline R32, R33, and R34 Cylinder Head Coolant Passage Plug for RB26, RB25, and RB20 engines is a precision-engineered component designed to maintain optimal cooling system integrity. Installed in threaded holes along the intake or exhaust sides of the cylinder head, this taper plug, also known as a blind thread or coolant gallery sealing plug, ensures the ends of internal coolant passages are securely sealed. By preventing leaks and maintaining proper coolant flow, it protects the engine from overheating, hot spots, and corrosion, which is especially critical during high-boost or high-RPM operation common in performance RB-series engines.
Constructed from durable steel with an M12x1.25 thread and a slight taper, the plug expands when torqued to create a reliable, gasket-free seal. Its role in preserving coolant pressure and preventing air ingress ensures consistent thermal management, safeguarding critical components such as the combustion chambers, valves, and exhaust ports. This plug is routinely inspected or replaced during cylinder head servicing, resurfacing, or full engine rebuilds to avoid stripped threads, leaks, or coolant system inefficiencies.
Terra Firma Automotive supplies genuine Nissan Cylinder Head Coolant Passage Plugs, ensuring the highest quality and OEM-standard fitment. Installing the correct plug preserves engine reliability, supports efficient thermal management, and maintains the performance and longevity of Skyline R32, R33, and R34 engines in both street and high-performance applications.
- 6 Required Per Cylinder Head
- Sold As Each
- Not For RB20E Single Cam Motors
- 20mm Wide
- 10mm High
- M12x1.25 Thread
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