Radiator leak after hitting a speed breaker – how to check if it’s repairable?

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Radiator leak after hitting a speed breaker – how to check if it’s repairable?

I own a 2023 Haval H6 HEV, and last week I hit a high speed breaker near Multan. A few days later, I noticed coolant leaking near the radiator area. The front bumper seems fine, but the leak starts after the engine runs for a few minutes. A local mechanic said the lower radiator portion might be cracked, while another suggested it could be a loose hose o r damaged radiator clamp. Since parts for hybrids aren’t easy to find in Pakistan, I’m not sure whether to get it repaired with epoxy/aluminum soldering o r replace the whole radiator. What’s the best option considering Pakistan’s hot weather and spare part availability?

Talha Kyanii asked on 25 Oct 2025 16:12:05 pm

1 Answer

18 views |

Gari Master - on 25 Oct 2025 16:13:18 pm

This kind of leak is quite common after an undercarriage impact because the lower radiator support o r plastic base tank can crack. It’s good that your bumper looks fine — the damage is likely at the bottom radiator seam o r pipe connection.

Here’s how to proceed:

Visual Check: Use a flashlight under the car when the engine is warm — if you see coolant pooling around the radiator’s lower corner, that’s likely the crack area.

Pressure Test: Have a radiator shop test it under pressure they’ll immediately see if it’s leaking from a joint o r a puncture.

Repair Feasibility:

Small cracks on the plastic tank can be fixed with radiator epoxy o r plastic welding.

Metal core damage if fins o r tubes are crushed means you’ll need a new radiator.

For HEV Models: Since your car is a Haval H6 Hybrid, it’s better not to delay — overheating can affect the hybrid system. Order an OEM radiator from a GWM service center hybrid variants use slightly different cooling configurations.

For temporary relief, you can use distilled water + coolant mix to keep driving short distances, but don’t rely on it too long — a radiator replacement is the safer option in Pakistan’s heat.