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Radiator and Thermostat Replacement: What to Charge (2026 Cooling System Pricing)

Updated 2026-10-17. Sources are listed at the end.

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Overheating calls are good mobile work. The car often shouldn’t be driven, so the customer would rather you come to them. Quoting is the hard part, because “it’s overheating” can mean a $30 thermostat or a $1,000 radiator. Here’s what the market charges, and how to quote without guessing.

2026 national price ranges

From RepairPal’s national estimates (updated Sept. 3, 2026; exclude taxes and fees; not adjusted for location):

JobTotalLaborPartsSource
Radiator replacement$1,368–$1,550$375–$550$993–$1,001RepairPal
Thermostat replacement$616–$716$195–$286$421–$429RepairPal
Water pump replacement$891–$1,135$366–$536$525–$598RepairPal

Those parts figures are national averages across many vehicles, including housings and coolant. Your parts cost for a specific car can be very different, so quote the actual part by VIN.

Diagnose first, then quote

Before you sell parts on an overheating complaint:

  1. Pressure-test the system and look for external leaks at the radiator, hoses, water pump weep hole and heater core.
  2. Check fan operation and look at coolant temperature data on a scan tool. A failed fan or sensor can mimic a bad thermostat.
  3. Check for combustion gases in the coolant if the customer reports white smoke or coolant loss with no visible leak. That’s a different, much bigger job.

Charge for the testing if it takes real time. See how to set a diagnostic fee. RepairPal also advises against “stop leak” products as a fix. Tell customers that up front so you’re not blamed for one somebody else poured in.

Price it from your own rate

Quote = book hours × your labor rate + parts × (1 + markup) + trip fee

Get your rate from the labor rate & break-even calculator. For example, with 1.8 book hours for a radiator at $95/hr and a $220 radiator at a 35% markup: 1.8 × $95 = $171.00 labor + $297.00 parts = $468.00 before coolant, tax and trip fee. That’s well under the national range because the parts are cheaper. That’s normal for common vehicles and a good reason to quote by VIN.

Old coolant is regulated

Don’t dump drained coolant. EPA says used antifreeze must not go down drains or on the ground, and most states regulate its disposal. See shop waste: coolant, batteries and more.

Sources