Thank you for the donation.
When overheating occurs and the radiator fans do not stop after starting, then the cooling efficiency is poor. Possible causes are :
1. Weak water pump.
2. Clogged radiator, normal flushing would not help, you need to remove the raditor to get the core internal lines cleared.
3. Bad thermostat. It is not opening sufficently.
4. Cooling fans not working.
5. Insufficient coolant in system.
Coolant should not be mixed, ie. Different brands in the system can cause clogging.
If the coolant is murky, it means the system could be clogged somewhere or has a lot of contaminants in it. One of the best way to check fior clogging and the condition of the coolant flow is to remove the thremostat and run the engine. If you can see the coolant flowing fast in the system then the water pump should be ok.
Let the engine run and replace the coolant with water to clear out any contaminant. Repeat a few times, each time allowing the water in system to heat up, which will then be able to clear the contaminants. A good radiator flush would help. It would be best to do the flushing over a period of a few days (without the thermostat to check if it is the cause).
Once the water in the system loooks clean, you can proceed to replace with coolant if it is not overheating.
Wednesday, October 24th, 2018 AT 1:29 PM