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 Heat Control Valve: Description
Vacuum operated exhaust heat control valves are used on 2800 cc engines. Unit consists of a housing and butterfly valve controlled by a vacuum motor. Exhaust heat control valve is installed between exhaust pipe and exhaust manifold. The system also incorporates a Ported Vacuum Switch (PVS) and an intake manifold vacuum tap to control when and how long exhaust heat control valve operates.
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.