Hi My car's automatic fan starts around 35-40% temp scale normally. Recently it started around 60% scale while I was driving in congested traffic. (Thermostat valve is removed since overhaul so I can notice the temp needle coming down as the fan starts). Once I reached home I kept the car started in order to repeat the incidence while I was looking for some bad/rusted fan connections. Suddenly the radiator literally bursted while the temp needle was one needle width above 50% scale mark. On examination i found that water inlet 'side plastic radiator tank' had cracked 5 inches.
Result: I replaced the OEM radiator with the new one costing Rs. 7,000/- incl labour on the advice of mechanic that the original was weak and rusted/ small repairs at 2/3 places were present. He also said that 'radiator side plastic tanks' replacement/repair with adhesive (magic) is not a good solution in this case and chances of future leakage/problems are anticipated especially in summers. Further more it is hard to repair Aluminium radiators if they are weak and the repairs are not long lasting.
Radiator prices: 12,500/- (Original Korean)
6,500~7,000/- (known as Chinese) Design/length & Width is same as original (Aluminium, single wide 'nali' with plastic side tanks) but thickess is less. (As per mechanic this type is commonly installed/functioning successfully as a STANDARD in various Daewoos and there are no complaints.
Also the new plastic 'radiator side tanks' are also available in the market for Rs. 1300/- one side approx.
Also I witnessed some Daewoos with custom made 'triple nali' thick COPPER radiators costing approx 10,000/- for so called 'super cooling' and repeated repairs without any problems.
Fortunately the so called chinese one installed in my car has the same thickness of the original so I am happy. Probably it is some newer version.
QUESTION: Can some one elaborate as to why the automatic fan started late and on what thing(s)/input(s) it depends on ???? Any easy way to diagnose?????
Although I have made the fan direct now but knowing that the temperature remains at zero mark is not good for consumption atleast. Any solutions/ recommendations.....?????
(My Daewoo mechanic/electrician said there are 'many factors....:)' so always keep the fan direct (where it functions at slow speed at normal conditions and changes the speed to fast if temperature rises more)
