Factory Dodge Diplomat Parts and Accessories

Dodge Diplomat Maintenance: a Q&A

Your Diplomat is a classic Dodge car of the 1980s, and as such, it's going to need fixing -- something that's no problem, provided you know a thing or two about it. If you're not sure what to do or when to do it, though, here are some frequently asked questions (FAQ) about regular service. Stay on top of that, and the car should run many years more.

When Should I Change the Air Filters in My Diplomat?

As soon as you see the signs that they're going bad. They include clogged, discolored, or damaged filter fibers, a lit Check Engine light on the dash, trouble accelerating, worsening fuel economy, black smoke coming from the exhaust, and an interior that smells dirty or stale. Otherwise, you replace air filters every 12,000 to 15,000 miles.

When Should I Replace the Spark Plugs in My Diplomat?

Most these days last up to 100,000 miles. Otherwise, you change spark plugs when you see the signs that they're faulty: the plug leads starting to corrode or widen excessively, the plugs not conducting electricity as well, the engine misfiring or failing, or the worst-case scenario, breakage. Broken spark plugs should be replaced ASAP, as they can end up causing severe engine cylinder damage.

When Should the Serpentine Belt in My Diplomat be Changed?

Check it every 50,000 to 100,000 miles. If it seems to be in good shape, but appears to need tightening, tighten it. Otherwise, you replace a serpentine belt when you see the signs it's failing. They include cracking, fraying, or glazing, squeals or chirps (which can mean slippage), and the belt having contacted coolant, oil, or power steering fluid (which will have damaged it). Other symptoms range from things like loss of power steering control and air conditioner malfunctions to a lit Check Engine light on the dash, a drained or dead battery, an overheating or stalling engine, and accessories damage.

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