Kenworth T800 Radiators

Frequently Asked Questions About Kenworth T800 Radiators

Will this radiator fit my Kenworth T800, and what should I check before ordering?

Kenworth T800 radiators vary by model year and engine option, so core size, tank configuration, and mounting points can differ across production runs. Before ordering, verify your truck's VIN, engine make and model, and compare the core dimensions and inlet/outlet placement of the listed part against your original unit. If you're unsure, our team can help confirm fitment using your VIN or the part number from your existing radiator.

Is this a new, remanufactured, or used radiator, and how does that affect performance?

Our listings typically specify whether a radiator is new, aftermarket, or a quality-tested used unit pulled from a donor truck. New and aftermarket units come without prior wear, while used radiators are inspected for leaks, core damage, and overall condition before sale. Each option is priced accordingly, so review the product description carefully to know exactly what condition you're purchasing.

What materials are these radiators made from, and does that impact durability?

Most T800 radiators use aluminum cores with either plastic or aluminum tanks, depending on the manufacturer and model year. Aluminum cores are valued for corrosion resistance and heat dissipation, while tank material can affect long-term durability under vibration and pressure cycles. If longevity in harsh conditions is a priority, look for radiators with aluminum tanks or ask us about the specific construction of a listed part.

What's involved in installing a replacement radiator on a T800?

Installation generally involves draining the coolant system, disconnecting hoses and mounting brackets, removing the fan shroud if applicable, and swapping in the new radiator before refilling and bleeding the cooling system. Because radiators are heavy and coolant systems are pressurized, this job is best handled by someone comfortable with medium/heavy-duty truck repairs or a qualified technician. Always follow proper coolant disposal practices and torque specs for mounting hardware.

How do I know if my radiator actually needs to be replaced versus repaired?

Common signs pointing to replacement rather than repair include core damage beyond a small repairable area, persistent leaks after a repair attempt, corrosion at the tank seams, or an engine that consistently overheats despite a functioning fan and thermostat. Small pinhole leaks or minor tank cracks can sometimes be repaired, but widespread core damage or a compromised tank-to-core seal usually calls for a full replacement to avoid recurring cooling issues.