Question about 1996 Cadillac DeVille

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Overheating. i put in a new thermastate, clutch fan and a new radaiator cap, and today i flushed out my radiator

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  • Anonymous Dec 14, 2008

    I have the same problem and would like to know how to bleed the radiator correct because I cannot find the brass nut to bleed the system.

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Hi have a pressure test done on the cylinder head to rule out a head gasket failure, also check the water pump, and last make sure the coolant system has been bled properly,

Hope this helps

Steve

Posted on Dec 14, 2008

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Why is my 1994 ford e350 7.5 engine over heating


If it's overheating because of loss of coolant, replace the radiator cap with one of higher pressure. May just be a bad cap gasket.

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My 2000 durango keep overheating and the hose keeps bursting. the waterpump and various other parts have been changed. The radiator does not have a leak. The pressure in the radiator is said to be fine....


if it has the 4.7L engine they crack cylinder heads and the compression from the engine put air into the cooling system you can buy a tester that you hook up to the cooling system that changes color with exhaust fumes auto parts stores can get it or stock try napa

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I have a 1994 ford F-150 , 5- speed, 6 cylinder, Engine size 300. I have to pull over to the side of the road and turn the engine off because its overheating in stop and go traffic


If it only is overheating when going slow, then one of three problems exist; One, there is not enough coolant in the engine. Check the level of anti-freeze in the truck, and top off as neccessary.
Two,
the coolant is not circulating through the radiator and engine properly. Check the Thermostat, and replace as neccessary. The Thermostat should be changed every couple of years or so, anyway.
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the air flow over the radiator is impeded somehow. Does this truck have a elcrtic Radiator fan? Or is it mechanical, being ran off the motor with a belt? If it is electric, then check the fans RELAY to see that it is working properly, and check the fan motor too. Check that there is no debris in the radiator fins.

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2000 EXPEDITION OVERHEATING 4 MILE AFTER LEAVING HOME NEW RADIATOR, FLUSH, AND NEW THERMOSTAT I DON'T KNOW WHAT THE PROBLEM IS


Here are a few things to try. Check your Radiator cap pressure as a weak cap will boil over more quickly. Replace your Temperature sending unit. There may be 2, one is for the dash gauge and the other is for engine control. Unless you have other signs of overheating you may not be overheating at all, just a bad sender.

Next, the cooling fan clutch is what the fan blade is mounted on. This is checked by using a Timing light with a RPM tach made into it. The fan clutch "locks" at a variable temperature. In cold weather it slips internally. In hot weather it engages or "locks". A mechanic measures the RPM of the blade to the RPM of the engine. This tells if the fan clutch is slipping too much internally.

Before considering a new water pump try a free scan at Autozone or Oreillys. If your Catalytic converters are plugged the engine will overheat. You should have a Code for this problem in the onboard computer. About all you can try after this is to remove the Thermostat completely and see if the engine still overheats.

You will have to replace the New Thermostat again because the other engine controls will not work right without it. But without the thermostat you can test for collapsed Radiator hoses at say 2500RPM or above. Thats about all I can think of, the water pump would cost the most. The cap, sensor-sender, fan clutch, and hoses are not that expensive.

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How to drain and flush radiator


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That leaves radiator or radiator fan problem or wrong thermostat. Did you or a mechanically inclined friend do the repairs ?

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Was the thermostat put in backwards? I know this is a silly question, but I've seen it happen. The water pump will fight it if it is. Another thing are the coolant passages, are they flushed out? Also, if that fan clutch is the original one, I would go ahead and replace that as insurance against the water pump breaking.

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could be a number of things
make sure your fan is working
is the coolant leaking?
make sure your water pump is operating
check the thermostat
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also inspect your radiator cap and the overflow
let me know if you need further assistance

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