Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Hi, my name is ***** ***** welcome to Just Answer. I would be happy to try and help you today. I want to start with a couple questions regarding your defect and truck.
Do you have to turn the fan on manually all the time now? The fan will not work automatically anymore? Has only started doing the overheat condition since you have had to use the fan manually?
Once the fan is on manually it cools the motor just fine?
My apologies for the delay Sir. So have you had any work done to it lately, or checked anything besides fluids yet? The more information, the better.
So to start I would recommend the following preliminary checks. First: Check your entire radiator to see if it may be getting plugged. Try to see if you can see light through the fins throughout the entire radiator. If it is hard to tell then try using a flashlight on the opposite side to try and see through. If you are having trouble seeing the light, or it looks dirty at all start by thoroughly washing the rad. The proper way to do this is to "Back Wash" So spray the water from the engine side back out the front. This makes sure that you don't plug the rad even more by forcing it back out the way it came.
Second I would check whether your coolant is building pressure while running. If you have a clear reservoir you should see the coolant moving while at idle. Your coolant pressure is regulated by your radiator cap so check the cap and if the system isn't reaching the pressure stated on the rad cap then I would recommend replacing your water pump. Sometimes its something small like the radiator cap is faulty. Please remember to not open the rad cap while the truck is running because it could be under pressure and spray hot coolant.
Please let me know your findings and we will proceed from there.
Have you had any chance to follow up on your truck? Let me know!
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