Radiator repair and replacement
Cracked, clogged, or corroded radiators repaired or replaced with parts that fit and flow correctly.
Cooling System
Cooling System Repair in Boulder, CO
Your cooling system keeps the engine alive through Colorado heat, altitude, and steep climbs. We keep every part of it working so it never lets you down.
Complete cooling system service for Boulder County: radiator repair and replacement, water pumps, thermostats, coolant leak diagnosis, coolant flushes, hoses, and electric cooling fans. We pressure test, fix the root cause, and back the work with a three-year warranty.
Every part of the cooling system, covered.
Overheating is one of the fastest ways to turn a small repair into a new engine. We service the whole system so heat never wins.
Coolant leak diagnosis
Pressure testing pinpoints the exact source of a leak before we replace anything.
Water pump replacement
Weeping or failing water pumps replaced before they strand you on a climb.
Thermostat replacement
Stuck thermostats cause overheating in summer and no heat in winter. We replace and verify.
Coolant flush and fill
Old, acidic coolant swapped for the correct specification to protect the whole system.
Hoses, fans, and caps
Radiator hoses, pressure caps, fan clutches, and electric fans inspected and replaced as needed.
Signs your cooling system needs service.
If you notice any of the following, do not wait. Small issues become expensive ones quickly.
- Temperature gauge running hot or swinging
- Coolant puddles or a low coolant warning
- Steam or a sweet smell from under the hood
- Heater blowing cold when set to hot
- Overheating on climbs into the foothills or mountains
- Coolant that looks rusty, sludgy, or discolored
How we service a cooling system.
Confirm the symptom
We verify whether you are dealing with overheating, a leak, or steady coolant loss.
Pressure test
A cold pressure test reveals exactly where coolant is escaping.
Diagnose the cause
Radiator, pump, thermostat, hoses, or gaskets, we find the actual failure.
Estimate up front
A clear, itemized estimate and a plain explanation before any work begins.
Repair with quality parts
OEM-spec or premium parts and the correct coolant specification for your vehicle.
Bleed and road test
System bled of air, warmed to operating temperature, and road tested under load.
Why trust your cooling system to Legacy.
Diagnosis first
We pressure test and find the real cause instead of replacing parts and hoping.
Tuned for Colorado
Altitude and grades stress cooling systems hard. We service for the driving you do here.
Correct coolant, always
The wrong coolant destroys radiators and pumps. We use exactly what your vehicle needs.
Three-year warranty
Qualifying cooling system repairs are covered for three years or thirty-six thousand miles.
Mile-high roads ask more of every vehicle.
Boulder vehicles work harder. Thinner air, hard freezes, dust, sun, and steep grades all wear parts faster than the manufacturer schedules assume. We tune our service intervals to how your vehicle actually lives at altitude.
Altitude
Lean-running engines, harder-working turbos, and drivetrains that climb every commute.
Freeze cycles
Repeated thaw and refreeze chews through seals, hoses, batteries, and brake hardware.
UV and dust
High-altitude sun and grit accelerate paint, plastics, glass, and intake fouling.
Frequently Asked Questions
The radiator, water pump, thermostat, coolant, hoses, pressure cap, cooling fans, and heater core all work together to manage engine temperature. A failure in any one of them can lead to overheating, so we test the system as a whole.
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Boulder talks. We listen.
“These guys are honest, transparent, and clearly know what they are doing. They walked me through everything with photos before doing the work.”
Sarah K.
2019 Subaru Outback
“Best shop in Boulder. Free loaner, fair pricing, and they actually care about doing the job right. Will not take my truck anywhere else.”
Marcus T.
2017 Toyota 4Runner
“I am picky about who touches my EV. Legacy was the only shop locally that I trusted with the work, and they delivered.”
Priya N.
2022 Tesla Model Y
“These guys are honest, transparent, and clearly know what they are doing. They walked me through everything with photos before doing the work.”
Sarah K.
2019 Subaru Outback
“Best shop in Boulder. Free loaner, fair pricing, and they actually care about doing the job right. Will not take my truck anywhere else.”
Marcus T.
2017 Toyota 4Runner
“I am picky about who touches my EV. Legacy was the only shop locally that I trusted with the work, and they delivered.”
Priya N.
2022 Tesla Model Y
Ready to Book?
Schedule your cooling system repair in boulder today.
Free loaner vehicles for qualifying repairs. Photo and video documentation on every job. Three-year, 36,000-mile NAPA warranty.