Sri Lanka's Emerging Automobile Community for Land Rover Defender

NuwanJayasinghe · Sep 17, 2025, 03:34 PM

Guys, my 2003 TD5 constantly overheating in Colombo stop-go traffic. Temperature gauge climbs dangerously high during long traffic jams, especially around Slave Island and Dematagoda areas. Cooling system seems fine - replaced radiator, water pump, thermostat, all hoses. Electric fan working properly. Is this normal TD5 behavior or need upgrade? Thinking bigger radiator or auxiliary fan. Problem only happens in heavy traffic, highway driving fine. Don't want engine damage from constant overheating stress.

David_Christopher · Sep 22, 2025, 10:59 AM

Machang, TD5 overheating in traffic is common problem here! Our stop-go traffic worst nightmare for these engines. First check if viscous fan coupling working - should engage when hot. Also verify radiator not clogged internally despite being new. I added auxiliary electric fan with thermostat switch, made huge difference. Some guys install bigger radiator but expensive modification. Cheaper solution is quality coolant additive and make sure cooling system properly bled of air bubbles. Also consider engine remap to reduce heat generation. Prevention better than cure with TD5 engines!