Frequently Asked Questions About International PayStar 5000 Series Coolant Reservoirs

Will these coolant reservoirs fit my specific PayStar 5000 model year?

Our coolant reservoirs are designed to fit International PayStar 5000 Series trucks from model years 2005-2017. However, there are variations between early models (2005-2010) and later models (2011-2017) due to mounting bracket changes. Always verify your truck's VIN and engine type before ordering. If you're unsure, contact our support team with your truck's details for exact fitment confirmation.

What's the difference between OEM and aftermarket reservoir materials, and which lasts longer?

OEM reservoirs typically use reinforced polyethylene rated for temperatures up to 250?F, while aftermarket options vary between standard polyethylene (good for 180-200?F) and heavy-duty polypropylene (rated up to 275?F). Based on customer feedback, the heavy-duty polypropylene aftermarket options often outlast OEM by 2-3 years in extreme conditions. Look for reservoirs with UV-resistant additives if your truck operates in sunny climates, as this prevents cracking and yellowing.

Can I install a new coolant reservoir myself, or do I need special tools?

Installation typically takes 45-90 minutes and requires basic hand tools: 10mm and 13mm sockets, pliers for hose clamps, and a drain pan. The main challenges are accessing the lower mounting bolts (especially on trucks with aftermarket accessories) and properly bleeding the cooling system afterward. You'll need to drain approximately 2-3 gallons of coolant before removal. Many customers report easier installation by removing the passenger side air cleaner assembly first for better access.

Why do PayStar coolant reservoirs crack at the neck, and how can I prevent this?

The neck area experiences the most stress due to pressure cycling and vibration. Common causes of cracking include over-tightening the cap (torque to 15-18 ft-lbs only), using incorrect coolant mixtures that degrade plastic, and excessive engine vibration from worn motor mounts. To prevent cracking, replace your radiator cap every 2 years, maintain proper 50/50 coolant mixture, and check motor mounts during regular maintenance. Reservoirs with reinforced neck designs or metal inserts at the cap threads offer better longevity.

Do these reservoirs come with new sensors and hoses, or do I need to order separately?

Most replacement reservoirs come as the tank only - you'll need to transfer your existing coolant level sensor, overflow hose, and radiator cap. The sensor typically uses a standard 2-pin connector that transfers easily, but inspect the sensor gasket and replace if cracked (part #3687429C1). We recommend replacing the overflow hose and clamps during installation since these often become brittle. Complete kits including sensors, hoses, and caps are available for about $40-60 more than tank-only options.