Firewall
A vehicles firewall is the bulkhead separating the engine
compartment from the passenger compartment. It also helps
to protect the occupants in a collision as well as subdue
the sound from the engine. The firewall is not a solid bulkhead,
many wires, hoses and airducts pass through it, usually through
small holes with rubber fixtures protecting the wires from
abrasion against the sharp metal holes.
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