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Dealing with a used vehicle, how would you decide when to replace radiator hoses, heater hoses, vacuum hoses...when you have no idea if they are OEM or replacement.
Sometimes the hoses blister or look stretched out. If you really want to test take a pressure tester to the system and pump it to designated pressure, if everything holds I would leave it alone.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.