Question about 1997 Cadillac DeVille

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Water will not flow through the radiator - 1997 Cadillac DeVille

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Take off upper hose -run car drain fluid-when draining stops add water hose to radiator top- run clear water out for 5 minutes-temporarily re-attach hose run for 3 minutes-open hose and let drain again for a few minutes with water hose inserted-take out hose and drain-do not let engine get hot-spray off front of radiator-reaatach hoser and top off at least 1 gallon antifreeze.

Posted on Sep 19, 2010

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Posted on Jan 02, 2017

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Top half or Radiator is hot while the bottom half remains cold . Is this normal


This can be due to one of a few different things...First of all, water flows from the engine to the bottom of the radiator, using the water pump and gravity, and the water returns from the radiator back into the engine on the top side.

Thermostat isn't opening...this causes the water / antifreeze to remain in the engine, and not flow through to the radiator. If the water / antifreeze gets hot enough, it should activate the thermostat and water should flow into the radiator through the bottom radiator hose.

The bottom radiator hose is either worn out (there is a spring inside the length of the bottom hose. it is there to keep the hose from collapsing under the suction pressure during normal use) If the hose feels spongy, soft, or shows signs of cracking, replace it.

The radiator may be clogged, preventing the water from flowing freely through all of the 'fins' in the grill section of the radiator. Hot water usually isn't just in the top section during a clogged radiator situation...

Jan 09, 2015 | Cars & Trucks

1 Answer

I had a 2003 buick hyderf rent it keep getting hot chang thevwater pump theomasant still hot what next?


Radiator is stopped up and/or it has dirt & debris preventing air flow through the outside wire venting.

Leave radiator cap off, Start the engine, let it heat up and watch to see if the water is flowing past where the cap fits. If water level drops-add water. If water does not flow/move then the radiator is stopped up. Take the radiator to radiator shop and have a professional flush.

If you have good water movement & it gets hot then the air flow through the outside venting is restricted. You may be able to use your garden water hose with high pressure jet stream & spray all the venting areas that may be clogged with dirt, bugs& debris. In any case DO NOT KEEP THE AUTO RUNNING WHILE DOING THIS.

Another problem may be that one of you hoses could be collapsing and the water will not flow. I advise changing all of your hoses based on the age of your vehicle . End of msg.

Aug 07, 2014 | Cars & Trucks

1 Answer

Over flow bottle


that normaly only happens if the radiator fan is not working or the water pump has given up

Jan 18, 2014 | 1991 Mazda 323

1 Answer

I need diagram for the inside of radiator to see how the water flows and what radiator actually looks like on the inside. could someone post a diagram for me


No you don't

Water flows either top to bottom
or across any radiator

Simple look at the tubes & you got your answer

Water will enter from the top hose, coming from the
thermostat,flow across most radiators & out the bottom
& back to the water pump

Any and all questions are avail-- if you use Google &
You Tube Video

Mar 29, 2013 | 2000 Ford Taurus

1 Answer

I got the t stat and the water pumped replaced and the water is not circulationing..i have a 2000 cavi.....i tryed everything what shud i do


When the water pump was replaced, was the radiator drained? If so, did it flow freely out? Are you looking into the upper radiator to determine it is not flowing? An inexpensive check would be to have the radiator cap pressure tested for free at your part store. A clogged radiator can keep the coolant from flowing properly. There are some radiator shops that will inspect and test your radiator for free also. Hope this helps.

Apr 12, 2012 | 2000 Chevrolet Cavalier

1 Answer

Yes it is normal just no hot air


1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

Jan 05, 2011 | 2000 Chevrolet Suburban

1 Answer

New thermostat fitted radiator cap had tested for blown gasket sees ok. Radiator looks very clean inside. Runs fine for plus munis 40 km [hard driving) and suddenly overheats pushing water into...


The radiator sheds heat at a specific rate. Increasing air flow increases that rate a bit, but even with increased air flow, there is a specific rate.

When you start out, there is a "cold reservoir" in the radiator — without shedding any heat at all, for a while the cold water in the radiator will keep the engine cool.

If the heat from the engine exceeds the heat the radiator can shed, as soon as the radiator water hits the temperature of the engine, you will have overheating.

If you have a head gasket leak, you are injecting heat directly into the water, heat that ought to go out the tailpipe.

If some of the tubes in the core of the radiator are not flowing, the ability of the radiator to shed heat will be diminished.

I am thinking it is either a head gasket leak/cracked combustion chamber, or a radiator that does not flow water through all the tubes.

A lean fuel mixture will generate a lot more heat than one that is richer. The coloration of the spark plug insulators can be helpful in assessing the mixture.

Jul 05, 2010 | Cars & Trucks

4 Answers

When you bypass the heater core the path for the water to go through the core is gone. Correct?, you have connected to engine water line out to the engine water input? thus bypassing the heater core........


No, you just won't have water flow through the heater core, Coolant flows through the engine through the lower radiator hose as the water pump sucks it out of the radiator and pushes it through the engine. It then flows out the top radiator hose when the thermostat opens. It then flows into the radiator to cool off.

Is your heater core leaking?

Aug 27, 2009 | Ford Expedition Cars & Trucks

1 Answer

This car runs hot when idleing but is fine at highway speeds. I just replaced the water pump and had the radiator rodded out. the electric fan is running fine and moving air well.


The thermostat might be stuck open. If it is then water running into the radiator is not spending enough time there to cool off before flowing back to the engine block. At speed the increased airflow is having a greater cooling effect while blowing through the radiator fins. With the car totally cool, open the radiator cap and then start the car. Watch the water flow in the radiator. If it is flowing straight through right from the start, you'll know it is the thermostat. It should sit in the radiator until the engine reaches opening temperature and then the flow begins. As soon as the cool water from the radiator reaches the thermostat, it closes and the flow stops. So constant flow equals bad thermostat, flow then stop then flow equals working properly.

Aug 03, 2009 | 2002 Ford Mustang

2 Answers

Radiator question


The way it works is that the water in the radiator will sit there and not circulate when the thermostat is not open until operating temp. is reached. Once it is reached you should see the water in the radiator circulate at this time.

Jun 23, 2008 | 2001 Mazda 626

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