Kklim Supercharged March 17, 2020 Share March 17, 2020 Was almost home after dinner when overheating light kit up. Turned off engine, opened up bonnet and noticed water was flowing out of the plastic expansion tank at its cap. Radiator itself seemed ok. What could be the cause? Bad radiator cap, blown fan fuse (checking tomorrow), stuck thermostat, bad water pump? ↡ Advertisement 1 Link to post Share on other sites More sharing options...
mersaylee Supersonic March 17, 2020 Share March 17, 2020 All are possibilities...cap is the cheapest fix. Try get one from someone with the same model to see if that’s the cause. Link to post Share on other sites More sharing options...
kobayashiGT Internal Moderator March 17, 2020 Share March 17, 2020 36 minutes ago, Kklim said: Was almost home after dinner when overheating light kit up. Turned off engine, opened up bonnet and noticed water was flowing out of the plastic expansion tank at its cap. Radiator itself seemed ok. What could be the cause? Bad radiator cap, blown fan fuse (checking tomorrow), stuck thermostat, bad water pump? Do you need workshop recommendation? Link to post Share on other sites More sharing options...
inlinesix Supersonic March 17, 2020 Share March 17, 2020 (edited) If diesel, it could be valve cover gasket uplorry Once cool down, top up radiator before drive to mechanic Edited March 17, 2020 by inlinesix Link to post Share on other sites More sharing options...
Ct3833 Supersonic March 17, 2020 Share March 17, 2020 41 minutes ago, Kklim said: Was almost home after dinner when overheating light kit up. Turned off engine, opened up bonnet and noticed water was flowing out of the plastic expansion tank at its cap. Radiator itself seemed ok. What could be the cause? Bad radiator cap, blown fan fuse (checking tomorrow), stuck thermostat, bad water pump? What you said are all possible, check if the radiator fan is blowing when engine gets heat up. It could be a malfunction water pump as well, not completely dead but inefficient. Link to post Share on other sites More sharing options...
Kklim Supercharged March 17, 2020 Author Share March 17, 2020 16 minutes ago, kobayashiGT said: Do you need workshop recommendation? Yes, please. Prefer AMK or Sin Ming so don't have to drive too far. Thanks. Link to post Share on other sites More sharing options...
kobayashiGT Internal Moderator March 17, 2020 Share March 17, 2020 Just now, Kklim said: Yes, please. Prefer AMK or Sin Ming so don't have to drive too far. Thanks. What car are you driving, If you don't mind sharing. . . Link to post Share on other sites More sharing options...
Kklim Supercharged March 17, 2020 Author Share March 17, 2020 10 minutes ago, Ct3833 said: What you said are all possible, check if the radiator fan is blowing when engine gets heat up. It could be a malfunction water pump as well, not completely dead but inefficient. Aircon was less cold so I think the fan wasn't working. 10-year-old Sylphy BTW. Link to post Share on other sites More sharing options...
Ct3833 Supersonic March 17, 2020 Share March 17, 2020 4 minutes ago, Kklim said: Aircon was less cold so I think the fan wasn't working. 10-year-old Sylphy BTW. Someone had the same problem long before you. Link to post Share on other sites More sharing options...
Apple-Tree 6th Gear March 17, 2020 Share March 17, 2020 1 hour ago, Kklim said: Was almost home after dinner when overheating light kit up. Turned off engine, opened up bonnet and noticed water was flowing out of the plastic expansion tank at its cap. Radiator itself seemed ok. What could be the cause? Bad radiator cap, blown fan fuse (checking tomorrow), stuck thermostat, bad water pump? Very likely blower connector corroded lor. Is the fan spinning ? If connector, go value shop buy a terminal block 80cts. Scissor cut cut. OK liao. 1 Link to post Share on other sites More sharing options...
Kklim Supercharged March 18, 2020 Author Share March 18, 2020 (edited) Just checked. Fan fuses ok and radiator is full. Stuck thermostat? Edited March 18, 2020 by Kklim Link to post Share on other sites More sharing options...
Ct3833 Supersonic March 18, 2020 Share March 18, 2020 13 minutes ago, Kklim said: Just checked. Fan fuses ok and radiator is full. Stuck thermostat? Fan fuse ok but is the fan spinning ? The fan motor might be gone. Water pump worth checking too. drive your car to a mechanic for a check better. Link to post Share on other sites More sharing options...
Kklim Supercharged March 18, 2020 Author Share March 18, 2020 Thanks, guys. Waiting for AA tow truck. Link to post Share on other sites More sharing options...
Watwheels Supersonic March 18, 2020 Share March 18, 2020 (edited) 14 hours ago, Kklim said: Was almost home after dinner when overheating light kit up. Turned off engine, opened up bonnet and noticed water was flowing out of the plastic expansion tank at its cap. Radiator itself seemed ok. What could be the cause? Bad radiator cap, blown fan fuse (checking tomorrow), stuck thermostat, bad water pump? When everything cooled look at the radiator cap. Thing to look out for is the rubber seals underneath the cap. Should be about 2-3 layers at different levels. See whether it gives a tight feel when turning to lock the cap. If leng leng means it's as good as open. It's good to check it every 2-3 years. Edited March 18, 2020 by Watwheels Link to post Share on other sites More sharing options...
Kb27 Supersonic March 19, 2020 Share March 19, 2020 My guess is a simple stuck thermostat. It didn't open to let the coolant flow into the engine. Engine overheat. Water pump continues to pump and the coolant back up into the overflow tank. Link to post Share on other sites More sharing options...
Kklim Supercharged March 19, 2020 Author Share March 19, 2020 (edited) Workshop diagnosed as blown head gasket. There was some oily deposit in expansion tank. 10 years liao (just renewed COE). Edited March 19, 2020 by Kklim Link to post Share on other sites More sharing options...
inlinesix Supersonic March 19, 2020 Share March 19, 2020 3 minutes ago, Kklim said: Workshop diagnosed as blown head gasket. There was some oily deposit in expansion tank. 10 years liao (just renewed COE). Diesel engine? Link to post Share on other sites More sharing options...
Kklim Supercharged March 19, 2020 Author Share March 19, 2020 Just now, inlinesix said: Diesel engine? Petrol. Sylphy G11 1.5L auto. Only go over 3K rpm on NSH ↡ Advertisement Link to post Share on other sites More sharing options...
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