O-RING, CVTF WARMER

CVT Fluid Warmer Seal Ring

This small seal ring is vital for keeping the CVT fluid warmer circuit tight and leak-free ?. It sits between mating metal surfaces where warm transmission fluid passes, helping the gearbox reach working temperature faster and stay stable in changing weather.

Why this part is needed

A CVT depends on clean, correctly pressurized fluid. The warmer unit uses fluid flow to manage temperature, and this seal ring prevents pressure loss and seepage at the joint.

How it works

Made from oil-resistant elastomer, the ring compresses when the housing is tightened. That compression fills tiny surface imperfections, creating a reliable barrier against CVTF leaks and air intrusion.

What happens if it’s worn or broken

A flattened, cracked, or hardened ring can cause fluid leaks, slow warm-up, and unstable hydraulic pressure. You may notice shudder, delayed engagement, overheating, or warning lights. Continued driving can lead to belt/pulley wear and costly transmission damage ⚠️.

Technician tip

Always replace the ring once opened, lubricate it with fresh CVTF before assembly, and torque evenly to avoid pinching.

Compatibility

• L300