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Historically, I believe the recommended interval has been 3 years. However, the
compounds used in belts & hoses these days are far more durable and, IMHO,
you can probably safely go 5 or more years.
As mentioned above, bulges & cracks are indications of impending failure.
Sorry guys. I wass trying to be humorous. Both AC belt and heater hoses are original to the truck. They are 24 years old!
The hoses still look and feel very good. The AC belt is a little shiney but no cracks. A failure of either component would not leave me stuck on a road side.
The more critical hoses and belts are all properly maintained.
Also the truck only has 125,000 on the clock. True mileage is higher. I have been running 30/9.50 tires for almost all of those 24 years.
I replace mine when they show a sign of needing it. Cracks, small bulges, getting soft etc... I check mine on a regular basis. The owners manual does not have a specific replace schedule. Just to check them annually.
Every three to five years is a good maintanance interval, however if you don't put that many miles on a truck in a year, then you could be throwing away good hoses and belts.
I buy motorcraft parts, so having motorcraft belts and hoses on my truck does not mean they are original to 1981.
Rezvani's Latest Post-Apocalytic 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.