Lincoln 4L3Z-6A664-AA Vent Hose

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The high temperatures under the hood of your vehicle's engine, accessory, and emission systems can cause material degradation so rubber and plastic hoses must be regularly inspected. To avoid possible leaks check that clamps are properly tensioned and ensure there has been no expansion or hardening at fittings. The PCV system hose should also be checked for damage such as cracks or leaks. If necessary clear any blockages within the hose using solvent. When inspecting vacuum hoses make sure they match material specifications as well as examine plastic T-fittings for cracks and hose distortion. Detect leaks by using a small piece of vacuum hose like a stethoscope. When checking flexible fuel lines look for chafing, deterioration, and cracks form from misuse or age; use hoses designed for your fuel injection system to replace them if needed. Screw clamps must replace spring-type clips during the replacement process. Also, check metal lines for bending, crimping, or cracks.