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2020 Equinox Premier - Coolant Disappearing, Engine Running Hot

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Sarah K. · rep 0 · May 25, 1:42 AM · 1 replies · solved · Question

Vehicle: 2020 Chevrolet Equinox Premier

My 2020 Chevrolet Equinox Premier (2.0L turbo) has been acting up lately. I've noticed the coolant reservoir is consistently low, and I have to top it off every couple of weeks. The engine temperature gauge also seems to be running a bit higher than usual, though it hasn't completely overheated yet.

I've looked around the engine bay for obvious leaks, but I don't see any puddles on the ground or significant drips. There's no white smoke from the exhaust, and the oil looks normal, so I'm hoping it's not a head gasket issue. Could it be a common problem with these models?

What should I be checking for? I'm comfortable doing some DIY diagnostics, but I want to make sure I'm looking in the right places before taking it to a mechanic.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:42 AM

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ClearTheCode admin answer: Coolant loss without visible puddles is a common, but frustrating, issue. It often indicates a slow leak that evaporates before hitting the ground or a leak in a less obvious location. For your 2020 Chevrolet Equinox, here's a diagnostic approach:

  1. Perform a Cooling System Pressure Test:

    • This is the most effective way to find external leaks. You can rent a pressure tester from most auto parts stores.
    • Connect the tester to the radiator or expansion tank and pump it up to the recommended pressure (usually around 15-18 psi, check your owner's manual or service data).
    • Inspect all hoses (upper, lower, heater hoses), the radiator, water pump, thermostat housing, and reservoir for drips or seeping coolant. Pay close attention to hose clamps and connections.

  2. Inspect Common Leak Points:

    • Water Pump: Check for residue or drips around the weep hole or housing.
    • Thermostat Housing: These can crack or have seals fail.
    • Radiator End Tanks: Plastic end tanks are prone to cracking over time.
    • Heater Core: If you smell coolant inside the cabin or notice a foggy windshield, the heater core might be leaking.
    • EGR Cooler (if equipped): Some engines use coolant to cool the EGR system, and these can develop internal leaks.

  3. Check for Internal Leaks (Less Likely but Possible):

    • Oil Cooler: Coolant can mix with oil if the oil cooler fails. Check your oil dipstick for a milky appearance.
    • Head Gasket: While you don't see white smoke, a small internal head gasket leak might only cause slow coolant loss. A combustion leak detector kit (sniff test) can check for exhaust gases in the coolant.

Causes of Coolant Loss & High Temps:

  • Pinholes in hoses, radiator, or heater core.
  • Failed water pump or thermostat housing gasket.
  • Loose hose clamps.
  • Cracked coolant reservoir.

When to See a Shop:

  • If you can't locate the leak after a thorough pressure test.
  • If you suspect an internal leak (e.g., combustion gases in coolant, oil/coolant mixing).
  • If the engine repeatedly overheats, as this can lead to severe engine damage.
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