The One Upgrade Every Fleet Should Make Before Summer

We’re Heavy Truck Solutions—and if there’s one thing we know, it’s fuel necks. With the summer season comes relentless heat, high pressure in your fuel tank, and an increased risk of leaks, vapor loss, and roadside headaches. That’s where the Leak Defender® steps in. If you’ve been putting off that Kenworth fuel cap replacement or haven’t inspected your seals lately, now’s the time. One simple upgrade can save your whole fleet from a summer of costly downtime and unnecessary risk.

Fuel Expansion = Big Trouble

When temperatures rise, so does the pressure inside your tank. If your fuel neck is worn or your gas cap seal isn’t tight, that pressure has to escape somewhere—usually through evaporation, leaks, or spills. It’s not just a fuel loss problem; it’s a safety issue. The Leak Defender® is engineered to create and maintain a tight seal under pressure, no matter how high the mercury climbs.

Say Goodbye to Leaky Necks

A cracked, stripped, or corroded fuel neck can lead to surprise repairs in the worst possible places—like the side of the highway. The Leak Defender® replaces the neck entirely with aircraft-grade billet aluminum and deeper threads that grip tight, even under stress. Don’t let fuel loss drag your route—and your profits—off course.

Your Kenworth Fuel Cap Replacement Solution

You don’t need a full parts overhaul. You need the one component that fixes the problem where it starts. Whether you’re driving a Kenworth, Peterbilt, or Mack, our Leak Defender® is designed to work with your truck.

Protect Your Fleet’s Bottom Line

No more emergency stops, no more surprise repairs, no more wasted fuel. Just one precision-engineered upgrade that keeps you moving. Heavy Truck Solutions is here to keep your fuel where it belongs—sealed, secure, and road-ready. Order your Leak Defender® today and keep your summer hauls leak-free.