How to Recognise This Problem
- Temperature gauge climbing into the red zone
- Steam or smoke coming from under the bonnet
- Sweet smell of coolant inside or outside the car
- Coolant puddle under the vehicle after parking
- Heater blowing cold air when it should be hot
- Engine power loss or rough running when hot
What Causes It
- Coolant leak from hoses, radiator, or water pump
- Failed thermostat stuck in the closed position
- Water pump impeller worn or failed
- Blocked or damaged radiator restricting airflow
- Blown head gasket allowing combustion gases into the cooling system
- Failed radiator fan or fan relay
- Low coolant level from a slow leak
What Happens If You Ignore It
Head gasket failure — one of the most expensive engine repairs ($500–$1,500+)
Warped cylinder head requiring machining or replacement
Cracked engine block — often means engine replacement
Damaged pistons, rings, and bearings from excessive heat
Catalytic converter damage from running rich when overheating
Being stranded on Harare's busy roads in dangerous conditions
Repair Solutions
Coolant System Pressure Test
We pressure test the entire system to locate leaks — hoses, radiator, water pump, and head gasket. From $30.
Thermostat Replacement
If the thermostat is stuck, we replace it to restore proper coolant flow. Quick fix, usually under 2 hours. From $40.
Water Pump Replacement
A failed water pump is a common cause. We replace with quality parts and flush the system. From $120.
Head Gasket Repair
If the head gasket has failed, we perform a full repair including cylinder head inspection. From $500.
Don't Wait — Get It Diagnosed
The sooner you identify the problem, the cheaper the fix. Book a diagnostic at J&B Motors in Harare today.