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Automotive glossary

Heat Shield

A heat shield is a thin metal plate that protects the floor, fuel lines and other parts from exhaust heat.

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What is Heat Shield?

It is fitted around the exhaust manifold, catalytic converter and silencers. Loose shields are a very common cause of rattles. Some are made from multi-layer material. Heat shields are also fitted near the fuel tank, brake lines and starter motor on some cars. A rattle at certain engine speeds is often a loose heat shield touching the exhaust.

How it works

The shield reflects radiant heat and leaves an air gap between hot parts and nearby components.

Why it matters for your car

Do not remove a heat shield without replacing it. Rusted mounting points can be repaired with suitable clamps.

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