Frequently Asked Questions About Mack CX Truck Diesel Fuel Tanks

What size fuel tanks are available for my Mack CX, and how do I determine the correct capacity?

Mack CX trucks typically accommodate fuel tanks ranging from 50 to 150 gallons, with 100-gallon and 120-gallon tanks being the most common replacements. To determine your correct capacity, check the data plate on your existing tank or refer to your truck's VIN-specific build sheet. Tank diameter is crucial - most CX models use either 23-inch or 25-inch diameter tanks. Measure from the bottom of your tank brackets to ensure proper fitment, as frame rail spacing can vary between model years.

Will these fuel tanks fit my specific Mack CX model year, and what about the Vision series?

Our fuel tanks are designed to fit Mack CX models from 2000-2015, including the CX Vision series. However, there are important distinctions: 2000-2007 models often have different strap configurations than 2008-2015 models. CX Vision trucks (typically 2005-2015) may require specific bracket adapters due to their aerodynamic fuel tank fairings. Always verify your truck's exact model year and whether it has the standard or Vision package before ordering, as mounting hardware can differ significantly.

Are these tanks made of steel or aluminum, and which material is better for my application?

We offer both aluminum and steel fuel tanks for Mack CX trucks. Aluminum tanks are lighter (reducing overall vehicle weight by 50-100 pounds per tank), resist corrosion better, and are ideal for over-the-road applications where weight savings improve fuel economy. Steel tanks are more economical upfront, offer superior impact resistance for construction or vocational use, and are easier to repair if damaged. Most long-haul operators prefer aluminum, while vocational trucks often benefit from steel's durability.

What installation challenges should I expect, and can I install these myself?

Installation typically takes 2-4 hours per tank for experienced mechanics. Common challenges include: aligning new strap brackets with existing frame holes (some drilling may be required on older models), properly routing fuel lines and crossover connections, and ensuring adequate clearance for DEF tanks on 2011+ models. You'll need basic hand tools plus a hoist or jack stands rated for commercial vehicles. Critical steps include transferring your existing fuel sending unit (not included with most tanks) and properly torquing all mounting hardware to 45-65 ft-lbs to prevent stress cracks.

Do these replacement tanks include all necessary hardware, or what additional parts will I need?

Most replacement tanks come as bare units without mounting hardware or fuel system components. You'll typically need to purchase separately: tank straps and brackets (specific to your model year), fuel sending unit (or transfer from old tank), fuel pickup tube and screen, tank venting components, and fuel line fittings. Some suppliers offer complete kits that include straps and basic hardware. Budget an additional $150-300 for mounting hardware if not transferring from your old tank. Always verify what's included before ordering to avoid installation delays.