On the top of the motor on both sides there are two round parts leaking small amout of oil on 2004 lincoln ls v8

engine size is immaterial when it comes to steering
what matters is body length, mounting positions and methods, tie rod lengths , position of pinion , method f attaching steering shaft
best if you go to a wreckers and view both steering assemblies side by side to check any differences
or you can pull both out and interchange or you can go to a dealer spares and see if the boxes have the same part numbers
or you can ring a steering specialist shop and ask if there is any differences

For the Lincoln LS V8, there is a flexable tube on the drivers side of the engine that runs from the valve cover/crankcase to the air intake tube. There isnt a PCV valve for this engine, it is just a tube for ventilation.

You have COP Ignition Coils Misfiring

They are bad enough to spike the PCM
and come back on the TPS Sensor and set
the 2107 & 2110 TACM Codes
(Throttle Actuator Control Motor)

You should have about 5 more codes

On compressor,drivers side,front,down low
Remove bottom and wheel well covers, to access

If you have a refrigerant leak,don't add any,repair the leak
That is the environmentally friendly way to go

well is the leak under the radiator cap or the engine block? the engine and the radiator are not the same thing. a dealer service department has illustrated parts breakdowns and i have never been refused a look, so long as i was patient and courteous. that way you get the name of the part, the part number, the dealer price, and the average time involved for a mechnic to replace it. you can actually help yourself in some instances.

You don't have a 4.6 V8 on an L/S. That is a truck motor

You have a 3.9 V8

You remove the covers, on top off the valve covers with a 7mm socket,as well as the coil with 7mm.

The oil leak will only cause a COP Coil Misfire---IF,the valve cover O'Ring is leaking oil,onto the spark plug.
If you have a PO304 Code with the check engine MIL Light on,then replace the COP Coil on #4.

Please DO NOT GO TO A DEALER. It is a WASTE OF MONEY

A 12 year old could change a coil, on your LS
All you need is a 7mm socket and wrench,for the coil cover and the one coil screw.
I just did one on my 2004 LS V8 in Feb. It was $59.00 at the local auto parts store
I don't dislike dealers,there is just no reason to go there ,except to buy parts,and only when the parts are dealer only.
Any repair shop can work on any vehicle.
If you ever have issues and you will have lots,I have all the shop manuals and wiring diagrams and Emission Diagnostic manual

It is on the bottom of the oil pan,just like every other vehicle ever made V8 is at back on pass side.

that is the watter pump, you need a new one

you may have oil leaking on exhaust.