I've been doing extensive work on my 1999 Ford Taurus. I'm' haveing a problem with the coolant coming out of the expansion bottle after the car is powered down. The coolant rises rapidly and escapes from the neck of the expansion bottle, just under the radiator cap. The cap is brand new. We did a block test and the test came up negative for combustion/emissions gases in the coolant. By-passed the heater core. It has a new Temperature Switch, the relay tested okay, but the cooling fans don't seem to be operating. What else could this possibly be? It's happening after short distance driving, seeming like it's not the radiator. Is there a way to check the fan motor to see if it is bad? Any comments greatly appreciated.
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Re: Cooling System Problems 1999 Ford Taurus
My friend had a 1999 taurus and had the same problem, his coolant would leak from around the overflow bottle because the system was backing up. His problem was a partially plugged radiator. I know this probably isnt the news you wanted to hear, but I'm pretty sure thats going to be your problem. sounds like you've replaced everthing else short of the radiator and water pump. Good thing is i remember him saying it was reasonalbly priced, so good luck.
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you need to perform a cooling system pressure test on the cooling system and test the radiator cap, taurus's had problem the coolant tanks splitting, and defective caps, also have a co2 test performed to determine if you have a headgasket leaking exhaust gasses into cooling system 23yr ford tech..
It sounds like you have an air pocket in your system. By the RH strut tower take the heater hose loose from the metal line and fill the cooling system when coolant starts coming out reconnect the hose. If that doesn't work jack the car up where the over flow tank is the highest point and fill the cooling system.
Yes this could be a hose, a heaterhose, fill the cooling system and run the engine so that preasure build then before it gets hot shut it down and look for mhoses and squeeze them and try to locate coolant coming out , a preasure tester would be a great tool to find this leak but by you squeezing the hoses you should find the leak or even when the engine runs it may push water out, or sometimes when filling the system you can find the leak. hope this is helpful.
Could be low on coolant, or a sticking thermostat, radiator fan not coming on, check for voltage there, if there no voltage possible coolant temp. sensor, relay or fuse, if there is voltage there, bad elec. fan motor.
Jackie, Hi, yes this would be the problem if the temperature sensor is not working it will not tell the fan too start, so best advice would be too change this sensor, or have someone do it for you and that should cure your problem, Colin.
I assume its overheating.
Ensure motor doesn't have tuning or mechanical problems (such as blown head gasket).
Check radiator core is not blocked,
Check operation of cooling fans.
Check the coolant system is correctly filled - any airlocks cleared (by bleeding as may be required).
Check radiator hose on suction side of waterpump not (soft) collapsing when engine speed above idle,
have u bled the cooling system ?warm the car and cut the car off right before the fans come on ,let sit for 30-35 minutes,see if the coolant drops in res. if so repeat process untill coolant stops droping ,then drive car regularly if overheating stops ,but monitor it because it will drop somemore/there has been reports of new and rebuilt water pumps nt having correct propelar mounted on them/ backwards etc. if this helps let me know [email protected]
Hi there. It sounds like you have done the most obvious checks and I can assure you by-passing the heater core will have no effect. There are three possible causes that you need to investigate further and you will need specialist equipment for it - you either have a hair-line crack in the head or cylinder wall or it might be that the head bolts are stretched and therefore weakened and so need replacement. To help you identify these aforementioned possible problems, you might need a specialist fluid that you put into the cooling system which changes colour when combustion chamber pressure enters the cooling system, you need to contact your local Ford Dealer for this - but then you still have the three possible problems to deal with - cracked cylinder wall/s, cracked head or stretched head bolts. Hope this helps, Scottech.