420254882 Intake or Exhaust Valve Guide for Sea-Doo Sport 18-300 1630 2026

Intake or Exhaust Valve Guide for Sea-Doo Sport 18-300 1630

This intake or exhaust valve guide, part number 420254882, keeps valve stems aligned in the cylinder head so the valves seat true and the engine holds compression.

Overview

This valve guide is made for the Sea-Doo Sport 18-300 1630 and serves as a direct-fit replacement for worn or out-of-spec guides in the cylinder head. It controls valve stem movement, which protects valve seats and keeps combustion sealed. It suits riders and mechanics rebuilding a top end who need a dependable valve guide for the 1630 engine platform.

Built For Performance

• Precision bore sized for proper valve stem clearance
• Manufactured to OEM cross-reference 420254882
• Fits both intake and exhaust valve positions
• Withstands repeated heat cycling in the cylinder head
• Restores valve alignment for consistent compression

Fits These Machines

• for Sea-Doo Sport 18-300 1630, 2026

On-The-Job Use

• Cylinder head rebuilds after valve seat wear
• Top end refreshes on the 1630 engine
• Valve train service when guides show excessive play
• Machine shop head work and valve replacement jobs

Specs At A Glance

Good To Know

Q: Does this guide fit both intake and exhaust valves? A: Yes, this guide is designed for either position on the 1630 cylinder head. Confirm your engine code and year before ordering.

Q: Can I install this without machining? A: Guide installation typically requires pressing and reaming to spec, so machine shop service is recommended. Check valve stem clearance after installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.