Prevent overheating in Rajasthan summers – radiators, thermostats, water pumps, hoses, and coolant best practices for diesel CVs.
What you will gain from this guide
- Never open radiator cap on hot engine – pressurised coolant causes burns
- Replace thermostat when servicing water pump – they fail together
- Use manufacturer-spec coolant mix – tap water alone causes scale
- Clean external radiator fins monthly in dusty conditions
Overheating events warp heads and destroy head gaskets – repairs that dwarf the cost of timely cooling system maintenance. Rajasthan and Gujarat operators see peak failures in May–June.
Who this helps: Workshop mechanics, fleet supervisors, and owner-drivers who service commercial vehicles regularly.
Root causes ranked
- Low coolant level from hose or radiator tank leaks
- Stuck-closed thermostat blocking flow
- Failed water pump impeller or bearing
- Clogged radiator internal or external fins
- Faulty radiator cap not holding pressure
- Blown head gasket (often result of ignored overheating)
Seasonal maintenance
Flush coolant every 2–3 years or per manual. Inspect hose clamps for creep. Replace soft, swollen hoses before they burst on highway.
Practical tip: If temperature gauge spikes in traffic, check if electric fan clutch or viscous fan is engaging – silent fan = common summer fault.
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