Question about Ford Ranger
The bottom of radiator is much cooler than top and their seems to be no water movement in the radiator.could it be clogged.we have replaced the thermastat and their seems to be no heat coming from heater
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Posted on Jan 02, 2017
SOURCE: 2004 jeep cherokee
Yes...and no. and you left out the electric fan, and clutch on primary fan. You need to determine the cause by testing. Unless the water pump is leaking or the bearing on the shaft is loose or noisy, it is not causing overheat. Primary cause of overheats is coolant loss. check everything for any and all leaks. Next, change thermostat. It's cheap and easy to replace plus it becomes unreliable after any overheat. Check electric fan to make sure it comes on when needed, and last, check that radiator is not either externally blocked (leaves etc) or internally blocked with calcium deposits. If you have any white smoke from tailpipe , coolant in engine oil or on spark plugs, you have a blown head gasket.
Hopefully it's something simple!
Posted on Apr 24, 2009
Did you run engine from cold, WITH HEATER ON, and fill cap off when re-filling system? If not, try that and see what happens. Let the engine get up to operating temperature and rad fan come on to cool 2 or 3 times before putting cap back on.
Posted on Nov 17, 2009
SOURCE: 03 Buick Rendezvous Overheating
If the top hose is hot and the bottom is cold, your definitely not getting circulation. You,ve already done alot of work to this vehicle so you have pretty much answered your own question. About the only thing left is the heater core. Of course, I dont want to be the one to tell you it is definitely the heater core because obviously I am not looking at the vehicle. But If i was a betting man, thats where my money would be.
Posted on Dec 14, 2009
SOURCE: 1990 subaru legacy
I hope this helps : A lot of people, even mechanics overlook the dramatic effects of "air lock" as described above. This is especially prominent in BMW's because they seem more "picky". Your cooling system (every cooling system) is balanced just well enough to nearly always keep your engine cool when operating properly. Sometimes a pocket of air does become trapped at one of the higher points ion the system however. This air pocket acts like a blanket trapping heat in the one dry area, in addition to impeding air flow. I would start WITH THE ENGINE COLD, by adding a radiator flush tee in to the heater hose leading to the intake. Start the car with the flush cap off, and the radiator cap. Play with the hoses and try to keep this tee higher than the fill cap on the radiator, to let out any air. When water is seen at the tee, cap it off and fill the radiator all the way, with the engine running, as to fill the entire block. Keep in mind that with the engine running, you kind of need to hurry. In only a few minutes, the water will get hot enough to start spewing from the open radiator (don't worry you have plenty of time, assuming it's all the way cooled down) I have seen many people leave their radiator half full, because it takes some time for the water to trickle all the way down through the runners on the radiator, and it looks full even though there is "air" (it's technically hydraulic pressure, like a siphon) holding it up. Hope fully that is the problem. You already re- did the whole system. Check your igniton timing too. Sometimes that can contribute to an overheat as well.
Posted on Dec 17, 2009
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