Exhaust Valve for Nissan Applications

Keep your engine breathing right. This high‑temp exhaust poppet valve seals the combustion chamber and releases spent gases with precise timing. Built from heat‑resistant alloy with a hardened face, it maintains compression, protects pistons and turbo components, and stabilizes idle and fuel economy. Perfect for professional engine rebuilds or a reliable replacement in daily workhorses .

Why it’s needed ️

The valve must lock in pressure during combustion, then open cleanly to evacuate hot gases. A correct seal prevents power loss, overheated cylinders, and seat erosion. OE-level geometry keeps timing and flow exactly as the ECU and cam profile expect.

How it works

Driven by camshaft and rocker action, the head lifts off the 45° seat on the exhaust stroke. The stem runs in a guide for alignment, transfers heat to the head, and returns via the spring. Proper face width and stem finish reduce wear, sticking, and blow‑by.

If it’s failing ⚠️

Expect hard starts, misfire, low power, popping/backfire, high fuel use, rough idle, and hot EGTs. A burnt or bent valve can torch the seat, crack the head, or damage the turbo/catalyst. Replace in pairs or full sets, verify guide clearance, lap seats, and fit new stem seals for best results ✅.

Compatibility

• Atlas
• Nv350 Urvan
• X-Trail
• Urvan
• Nv350 Caravan
• Navara
• Frontier