Is radiator blockage o r poor-quality coolant the main cause of engine overheating in Changan Kalam across Pakistan?

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Is radiator blockage o r poor-quality coolant the main cause of engine overheating in Changan Kalam across Pakistan?

Many workshops use tap water o r low-quality coolant, which causes scaling and rust. Could this be the hidden cause of frequent overheating?

Zarnish asked on 25 Jun 2025 13:01:43 pm

1 Answer

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Car Mechanic Expert - on 25 Jun 2025 13:09:26 pm

Yes, a major hidden cause is:

Use of tap water instead of distilled water + coolant, leading to:

Rust, scaling, and internal corrosion

Blocked radiator tubes

Pump and thermostat failure

Low-grade o r counterfeit coolants lack anti-corrosion agents.

➡️ Radiator blockage due to poor coolant choices is widespread in local workshops.