High‑Temperature Exhaust Valve for Nissan Applications ?

This precision exhaust poppet valve controls the outflow of hot gases from the combustion chamber. Built from heat‑resistant steel with a hardened face, it keeps compression strong and protects the seat while surviving extreme temperatures and constant cycles. Ideal for restoring factory performance and reliability in daily use or fleet service ?.

Why You Need It

A healthy exhaust valve preserves compression, clears spent gases, and keeps the catalyst safe. Replacing a worn valve brings back low‑end torque, smooth idle, and cleaner emissions. It’s a smart fix during head rebuilds or whenever a cylinder shows low compression.

How It Works

Driven by the cam and rocker/lifter, the valve opens precisely to vent exhaust, then closes to seal against the seat. The 45° face, correct stem diameter, and keeper groove ensure accurate seating, heat transfer, and stable spring retention.

What Happens If It’s Broken ⚠️

Burnt edges, bent stem, or seat recession cause misfires, power loss, hard starts, and poor fuel economy. Prolonged use can overheat the manifold and catalytic converter, trigger check‑engine lights, and damage the head.

Tech Notes

Match valve length and stem size, check guide and seat wear, lap or cut seats to spec, and set lash/clearance correctly for long life ✅.

Compatibility

• Nv350 Caravan
• Nv350 Urvan
• Murano