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Hydraulic cooling fan pump bypass - 2000 Lincoln LS

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Having some sort of a fan issue going on...


my guess is you dont know the radiator fan rules.
its different on each of 3 engines
I have the 3.7L in same car, same year, but is WK yours is XK
the larger passenger compartment with bigger engine.
i have the FSM (SM) factory service manual.
so will post the words out of it , its free to read, posted 300+ time here. and no more posts, im going dark....lol
chapter 7 covers both engine.
5.7:
the 5.7 uses hydraulic fan (not electric motors but uses hydraluic motors, off ps pump)
so is the PS, assist ok and no noises from it.?
first the quotes in cht.7
5.7L ENGINE The 5.7L hydraulic cooling fan is integral
to the fan shroud and is located between the radiator
and the engine.
The power steering pump supplies the hydraulic fluid
and pressure to rotate the cooling fan blade, while the
electrical part of the fan is controlled by the FCM.
The hydraulic fan drive (motor) consists of the three
major following components:
² Steering flow control valve
² Fan control valve
² Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable. Therefore
any failure of the fan blade, hydraulic fan drive or
fan shroud requires replacement of the fan module
because the fan blade and hydraulic fan drive are
matched and balanced as a system and servicing
either separately would disrupt this balance.
end quote now the rules
HYDRAULIC FAN STRATEGY
The hydraulic radiator cooling fan is controlled by the FCM. A PWM (Pulse With Modulated) signal from the JTEC
controls the fan speed. There are four inputs to the FCM that determine what speed percentage of fan is required
by the vehicle. These inputs are:
² Engine Coolant Temperature
² Transmission Oil Temperature
² A/C System Pressure
By monitoring these three parameters, the FCM can determine if cooling airflow is required. If airflow is required, the
FCM will slowly ramp up (speed up) the fan speed until the parameter(s) are under control. Once the temperature
HYDRAULIC FAN FLUID FLOW CIRCUIT
1 - POWER STEERING RESERVOIR
2 - POWER STEERING PUMP
3 - HYDRAULIC FAN DRIVE ASSEMBLY
4 - FAN BLADE
5 - HYDRAULIC FAN CONTROL SOLENOID
6 - POWER STEERING OIL COOLER
7 - STEERING GEAR
WK ENGINE 7 - 35
or pressure is reduced to within operating parameters the fan will ramp up, ramp down, or hold its speed to maintain
the temperature / pressure requirements.
NOTE: Even if the FCM is not requesting fan on operation the fan blade will usually spin between 100 and
500 RPM when the vehicle is at idle. This is due to a controlled minimum oil flow requirement through the
fan drive motor.

so is it still broke, or just a learning curve
its not simple at all.
in fact all 2005 up GC are complex fan controls
every one,
using tables to decide need, and speed.
on all modern jeeps.

Apr 10, 2016 | 2010 Jeep Commander 5.7

1 Answer

How to install a hydraulic cooling fan on a lincoln ls ,2002 model year?


the fan motor is going to need replacing. u have to take out the fan assembly along with the reservoir and the pump.

Jul 04, 2014 | 2002 Lincoln LS

3 Answers

Where is the engine fan relay located on 2000 lincoln ls v6


There is no relay on the cooling fan circuit.
If the cooling fan is not operating, check fuse #105 (20 AMP), in the underhood junction box, right front of engine compartment.
If fuse is good then test to make sure fan is getting power.
If no power then could be bad cylinder head temperature sensor, hydraulic fan solenoid, a/c cycle switch or the PCM.
If it has power but doesn't come on then fan motor is bad.

May 28, 2014 | 2000 Lincoln LS

1 Answer

My 2005 5.7 jeep grand cherokee has went through 4 power steering pumps?


take off the radator cap drive a new car under it . no really sould be the racket pioin gears

Nov 16, 2012 | 2005 Jeep Grand Cherokee

1 Answer

How to replace a cooling fan


dont know but 1 thing for sure i was told to replace the fan , so i had it replaced, turns out now the problem may be the power steering pump , ur fan isnt electrical it is a hydraulic ran fan, and is fead with power steering fluid and runs when power steering pump pumps fluid thru, or as simple as a heat sensor which im gonna replace both

Jan 15, 2011 | 2002 Lincoln LS

1 Answer

IS THERE ONE OR TWO COOLING FANS IS THERE A RELAY


you have a hydraulic cooling fan which is run by power steering fluid, if it isnt working properly then either fan , power steering pump or heat sensor is damaged, the fan isnt electrical at all , not 100% sure about the heat sensor being seperate or being part of the power steering pump

Dec 11, 2010 | 2002 Lincoln LS

1 Answer

My 2000 lincoln ls cooling fan will not turn on. Where is the fuse and relay located for this? I located the blower fan relay and fuse, but assuming the radiator cooling fan is on a separte circuit.


Radiator cooling fan is not electric, it is driven by a silly hydraulic pump which is located low on the passenger side of the engine above the alternator. All 2000-2002 LS's have this system. Most likely either the motor or pump has failed.

Aug 17, 2010 | 2000 Lincoln LS

1 Answer

1999 jeep grand cherokee laredo is engine fan belt driven or electric?


The radiator cooling fan used on the 4.0L engine is
an hybrid fan design. The hybrid fan system consist
of a low speed viscous driven mechanical fan and a
electrical fan.
The hydraulic fan used on vehicles equipped the 4.7L engine, replaces both the electric fan and the engine driven mechanical fan. The hydraulic cooling fan is integral to the fan shroud and is located between the radiator and the engine. The power steering pump supplies the hydraulic fluid and pressure to rotate the cooling fan blade, while the electrical part of the fan is controlled by the JTEC. The hydraulic fan drive (motor) consists of the three major components:
- Steering flow control valve
- Fan control valve
- Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable.
Therefore any failure of the fan blade, hydraulic fan
drive or fan shroud requires replacement of the fan
module because the fan blade and hydraulic fan drive
are matched and balanced as a system and servicing
either separately would disrupt this balance.

Oct 29, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Suspect hydraulic driven main cooling fan not


the fan speed could be one problem...the other problem could be wth the radiatr cores being blocked..check whether the heat on your radiator is even front top to bottom and on all sides...if it is not, clean the radiator and check for the problem

Aug 09, 2009 | 2000 Lincoln LS

4 Answers

2002 Lincoln LS overheating


The cooling fan on the LS-V8 is hydraulic yes. But it also has a pressure switch on the pump that drives the fan. It is controlled by the temperature sensor. All these things must be taken into account. But the whining sound my lead me to believe that the pump is either low on fluid or is wearing out. The fluid the fan pump uses is the same as the power steering pump container so check it first. The same thing happened to my wife's Lincoln. I replaced the fan as well because everybody told me to do that but it didn't work. I found out that the fan is just a hydraulic motor in reverse it only spins as fast as the pump makes it spin and that is controlled by the temp. sensors. When the engine get's hotter the pressure goes up and the fan spins faster. This adds more power to the engine when it's running cooler because the fan doesn't have to spin at max speed. So good luck. I hope this has solved your problem.

Apr 01, 2009 | 2002 Lincoln LS

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