Ford 4L5Z-6758-HA Vent Hose

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Be careful when dealing with air conditioning hoses. You should replace it by a dealer service department or specialize air conditioning shop. The system must be depressurized before disconnecting any hoses. Rubber and plastic hoses can decay because of high temperatures. Check hoses regularly for cracks, loose clamps, hardening, or leaks. Look for cracks, leaks, and blockages in the PCV hose. Vacuum hoses are color-coded to match different systems and marked accordingly. Hoses and fittings need to be labeled for reinstallation purposes. Inspect plastic T-fittings for cracks. For detecting leaks, use a small piece of vacuum hose instead. Be prepared to catch spilled fuel when disconnecting fuel lines. Check rubber fuel lines for deterioration, chafing and cracks. Use only high-quality fuel line for replacement purposes.

Spring-type clamps are commonly used on fuel lines.

To reduce hydrocarbon emissions, crankcase blow-by gas is vented through the PCV valve to the intake manifold via a rubber hose on most models.

Replacement of air conditioning hoses must be left to a dealer service department or air conditioning shop that has the equipment to depressurize the system safely.