Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Exhaust Emissions System - EVAP: Description
Fuel evaporation system is designed to prevent the escape of fuel vapors into the atmosphere. System consists of fuel tank, a fuel filler neck adapted to unleaded fuel delivery nozzles, and a non-vented filler cap. A two-way check valve, an activated charcoal canister, a vapor/liquid separator (part of two-way check valve) and connecting hoses complete system.
The R-5 is equipped with a check ball in fuel pump return line. The 1974 models also have an expansion tank, a control valve (built into the carburetor float chamber), and a series of ventilation lines which are used to connect the various components.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.