Peterbilt 587 Engine Parts & Cooling

Frequently Asked Questions About Peterbilt 587 Engine Parts & Cooling

What model years are these cooling parts compatible with for the Peterbilt 587?

Most of our Peterbilt 587 engine cooling parts are designed for model years 2011-2017. However, compatibility can vary based on your specific engine model (ISX15, DD15, or MX-13). Always verify your engine serial number and OEM before ordering. Key changes occurred in 2013 with updated coolant reservoir designs and in 2016 with revised radiator mounting brackets. Contact our parts specialists if you need help confirming fitment for your specific truck.

How difficult is it to replace a radiator or water pump on a Peterbilt 587?

Radiator replacement typically requires 3-5 hours for experienced mechanics and involves removing the charge air cooler, disconnecting multiple hoses, and careful handling of the heavy unit (radiators weigh 80-120 lbs). Water pump replacement is more complex, requiring 4-7 hours due to limited access behind the fan assembly. You'll need specialized tools including coolant pressure testers and torque wrenches. Many customers opt for professional installation, especially for water pumps, to ensure proper coolant system bleeding and avoid air pockets that can cause overheating.

What are the warning signs that my cooling system components need replacement?

Common indicators include coolant loss without visible leaks (often internal water pump failure), engine temperatures running 5-10 degrees higher than normal, coolant in the overflow tank appearing rusty or contaminated, and fan clutch engagement occurring more frequently. Radiator fins showing white residue indicate coolant seepage, while soft or collapsed radiator hoses suggest system pressure issues. Address these symptoms promptly - cooling system failures are the second leading cause of roadside breakdowns in 587s after 200,000 miles.

Which aftermarket brands offer the best quality and value for 587 cooling parts?

For radiators, Dura-Lite aluminum units offer 20-30% weight savings over OEM with comparable cooling capacity and typically last 500,000-700,000 miles. Horton and BorgWarner fan clutches are preferred rebuilds that match OEM performance at 40% less cost. Gates and Continental belts and hoses meet or exceed OEM specifications. Avoid economy radiators under $400 - they often use thinner cores that fail prematurely. Premium thermostats from Stant or Gates are worth the extra $10-15 to prevent stuck-open failures that reduce fuel economy.

What coolant type should I use and how often should I perform cooling system maintenance?

Peterbilt 587s require OAT (Organic Acid Technology) extended life coolant meeting Paccar P26-0013 or Caterpillar EC-1 specifications. Never mix conventional green coolant with OAT red/pink coolant. Change coolant every 3 years or 300,000 miles, whichever comes first. Test coolant freeze point and pH levels every 6 months - pH should stay between 8.5-10.5. Replace coolant filters every 12 months or 100,000 miles. Flush the system if switching coolant types or if contamination is present. Using incorrect coolant voids most component warranties and can cause premature water pump seal failure.