That hose is the differential vent hose. It is held onto the chassis up under the motor by a small clip. The hose does not attach to anything other than the differential.
That hose is most likely to be the axle vent. It has a hose on it to prevent water from entering your axle and differential if you drive through deep water. It should be secured up above the axle somewhere and just fell down. You can look at your rear axle to see how the hose there is secured and do the same thing for the front.
The thermostat is located at the termination of the upper radiator hose directly behind the fan.
Which drain plug? The oil drain plug is right on the oil pan. Remove it with a socket. The radiator drain plug is on the bottom corner of the radiator. Specifically on the rear facing driver's side of the radiator. It's easier to get to if you pull down the mudflap protector. This means popping out the plastic bolt but it doesn't break it, you can push it back in afterwards. The plug is hard to reach but you can turn it out with a pair of pliers. There's a little rubber hose making a U-turn from the drain hole to a dummy plug. Pull the top end of the hose out and the fluid will drain out of here convienently when you open the plug. Be sure to catch all your fluid or you'll kill the neighborhood dogs.
The Power steering hose is attached with a quick-connect that requires a Quick-Connect removal tool that should be available from you local auto-supply store. You need to know the diameter of the tubing / hose connection. There may be a universal tool for a range of sizes.
from the front of the engine you will find the PCV at the left rear end of the cylinder head cover(camshaft carrier) its a black plastic item with a pipe/hose connecting it to the air filter to turbo hose.
On a 2004 Ford Expedition , 4x4 : The front differential has a tube ( hose ) coming off the top of the differential ( the biggest part of the case where the gears are )
I know there is a vent hose on the front differential of the 4x4 so if the differntial fluid expands too much when warmed up it makes quite a mess ( its happened twice on my 1995 XLT after having front axle seals changed and the front differential fluid was topped up ) I believe the automatic transmission also has a vent hose
That is the axle vent hose. It ties off to the body above the axle.
If that is the vent hose for your front differential it does not connect to anything One end connects to the differential and the other end goes up high enough so water doesn't get in ( as far as i know )
As far as I know that is a vent hose and it just goes in an upward direction somewhere where it won't get damaged
Is the fluid coming from the vent hose ? When the differential fluid gets warm , it expands , and sometimes can come out the vent tube ( especially if someone has " topped it up " when it is colder ) or is it leaking from a front axle seal ?
sounds like either the thermostat housing or hose connection.
Follow the upper hose to the engine. It is the part the hose hooks to.
That is a vent tube, It let's the pressure out of the differential so it don't blow the grease seals out.
That hose is most likely to be the axle vent. It has a hose on it to prevent water from entering your axle and differential if you drive through deep water. It should be secured up above the axle somewhere and just fell down. You can look at your rear axle to see how the hose there is secured and do the same thing for the front.
Is it actually leaking from the axle seal or once it got warmed up did it shoot some fluid from the front differential vent hose ?
A cam lock is a crimping device method of connection either hose to hose or hose to pump. You place the band into the hook, pull the lever and it crimps the hose - it is a cam lock connection.