San Jacinto Valley summer temperatures push every cooling system to the limit. A weak radiator that ran fine in February will boil over in July. We pressure-test the entire system, find the actual failure point, and fix it — not just refill it. A Supercanic shop, where cooling system work is done the right way the first time.
Before pressurizing anything we inspect: coolant color (correct type? mixed?), level, hoses (soft spots, cracks, bulges), clamps, radiator condition (bent fins, leaks at seams), water pump weep hole, and overflow tank.
We connect a cooling system pressure tester and bring it to spec (usually 13–18 PSI). Then we watch — for 15 minutes minimum. A pressure drop tells us there's a leak. Where is it? We look, we feel, we use UV dye if needed.
Caps go bad. A cap that can't hold pressure means coolant boils early. 30-second test, often a $15 fix that saves you from overheating.
If we suspect a head gasket we use a block tester — chemical that changes color in the presence of combustion gases in the coolant. Cheap and definitive: yellow means combustion is in the coolant, your head gasket is gone.
We run the engine to operating temp and verify the thermostat opens at the correct temperature. We confirm electric cooling fans cycle on at the right temperature, that the A/C fan kicks on with A/C, and that the mechanical fan clutch (where applicable) engages properly.
Replace the failed component (radiator, water pump, thermostat, hose, etc.), refill with the correct coolant by type and ratio, and bleed the system properly — air pockets are why a 'fixed' cooling system still overheats. Then we run it through warm-up cycles and confirm operation.
Standard on most repairs. Parts and labor. If something we touched fails, we fix it again — no charge, no argument. That's how locally-owned shops have to operate.
★ Mon–Sat 7AM–6PM ★ 1685 S State St, San Jacinto, CA ★