The vacuum hose on the front right housing what does it plug into

The front hubs operate using a vacuum actuator in the hub of the front axle. This arrangement is used by ford/

See the vacuum hose connection in the blue box.

Jeep and others use a actuator attached to the axle housing.

Hope this helps?

Check the two vacuum hoses on the right
front side, of the front axle housing

You can use a hand held vacuum gauge, to check
the vacuum modulator & see if it will lock the front axle

Have to have the front end up in air & supported &
turn wheel/tire by hand, as you apply vacuum

Keep in mind with 4 wheel drive,only the right rear &
left front are driven wheels,not all 4

If the front axle locks in, with you pulling a vacuum & you have no
vacuum at the front hoses,then go to the transfer shifter & next to
it,is the vacuum switch

Not only do you have at least eleven vacuum hoses, there are thousands of cars that those eleven hoses might go to. So what good would it do to post the diagram for a Ford F150 if you happen to have a nissan 300Z?

check that free wheeling hubs are engaged (manual or vacuum operated or electrical operated )

Switch next to the transfer shifter or the vacuum
actuator on right side front axle housing or vacuum
hoses off

You can test the front vacuum device with a hand vacuum
pump while turning the wheels

All your checking is done under the truck,nothing comes apart

2.6L Engine

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Drain the cooling system.
3. Relieve the fuel system pressure.
4. Remove or disconnect the following:
   • Negative battery cable
   • Hood
   • Accessory drive belts
   • Accelerator cable
   • Positive Crankcase Ventilation (PCV) valve and hose
   • Air intake duct
   • Fuel pressure regulator vacuum line
   • Canister hose
   • Brake booster vacuum line
   • Engine wiring harness connectors at right wheel housing
   • Ground cable connector at the intake manifold, starter and firewall
   • Heated Oxygen (HO2S) sensor connector
   • Alternator wiring connectors
   • Oil pressure switch connector
   • Starter motor harness connectors
   • Ignition coil connector
   • Spark plug wires
   • Distributor
   • Exhaust front pipe
   • Exhaust Gas Recirculation (EGR) gas temperature sensor connector
   • Air pump
   • EGR pipe
   • Heat shield
   • Exhaust manifold
   • Throttle Position (TP) switch connector
   • Cooling fan
   • Water pump pulley
   • Power steering pump
   • Intake manifold
   • Crankshaft pulley
   • Front cover
   • Timing belt. Refer to the Timing Belt unit repair section.
   • Valve cover
   • Rocker arms
   • Camshaft
   • Cylinder head

Cylinder head bolt loosening sequence - 2.6L engine

1. To install:
2. NOTE: Refer to Section 1 of this manual for the cylinder head torque sequence illustration. The illustration is located after the Torque Specification Chart.
3. NOTE: Lubricate the cylinder head bolts with clean engine oil for assembly.
4. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows:
5. Step 1: 58 ft. lbs. (75 Nm)
6. Step 2: 72 ft. lbs. (98 Nm)

1. Install or connect the following:
2. Camshaft

• Rocker arms
• Valve cover
• Timing belt
• Front cover
• Crankshaft pulley. Tighten the bolt to 87 ft. lbs. (128 Nm).
• Intake manifold
• Power steering pump
• Water pump pulley
• Cooling fan
• TP switch connector
• Exhaust manifold
• Heat shield
• EGR pipe
• Air pump
• EGR gas temperature sensor connector
• Exhaust front pipe
• Distributor
• Spark plug wires
• Ignition coil connector
• Starter motor harness connectors
• Oil pressure switch connector
• Alternator wiring connectors
• HO2S sensor connector
• Ground cable connector at the intake manifold, starter and firewall
• Engine wiring harness connectors at right wheel housing
• Brake booster vacuum line
• Canister hose
• Fuel pressure regulator vacuum line
• Air intake duct
• PCV valve and hose
• Accelerator cable
• Accessory drive belts
• Hood
• Negative battery cable

1. Fill the cooling system.
2. Start the engine and check for leaks.

Fan relay is located under pass headlight. Remove light assembly, use 2 1/2 " hole saw to drill hole in plastic housing ,3"from back wall, 3'' from left side.This will put you right over relay. Unscrew two bolts,replace. Relay was $40.... dealer wanted$350 to remove front bumper to replace it.

So 80 degrees is approx. how many ft lbs.

CYLINDER HEAD REMOVAL

2.5L Engines

1. Before servicing the vehicle, refer to the Precautions Section.
   
2. Drain cooling system and engine oil.
   
3. Relieve the fuel system pressure.
   
4. Remove or disconnect the following:
   
   • Negative battery cable
     
   • Upper radiator hose and heater hose
     
   • Right side fuse/relay box and move aside
     
   • Engine undercover
     
   • Resonator and air cleaner case
     
   • Engine top cover
     
   • All electrical and vacuum lines at the head
     
   • Fuse hose quick connector at fuel tube side
     
   • Engine harness and power steering hose bracket
     
   • Timing chain
     
   • Drive belt tensioner
     
   • Camshafts
     
   • Spark plugs
     
   • Exhaust manifold
     
5. Support the engine from above and below with a suitable jack and hoist.
   
6. Remove or disconnect the following:
   
   • Power steering pump and reservoir and wire aside
     
   • Auxiliary drive belts
     
   • A/C compressor and wire aside
     
   • Upper sway bar links
     
   • Front and rear engine mount through bolts
     
   • Lower ball joints
     
   • 2 steering gear housing mounting bolts
     
   • Front suspension member bolts and front suspension member
     
7. Loosen the cylinder head bolts in the sequence shown and remove the cylinder head.
   

Removing the front suspension member—Altima


Cylinder head bolt removal sequence—2.5L engine–Altima and Sentra


Cylinder head bolt tightening sequence—2.5L engine–Altima and Sentra

To install:

1. Clean the gasket surfaces.
   
2. Using new head gaskets, install the cylinder heads.
   NOTE If possible, replacement of the head bolts is suggested.
   
   
3. If replacement of the head bolts is not possible, perform the following bolt measurement:
   
   • Measure the diameter of the head bolt 0.43 in. (11mm) from the bottom of the bolt.
     
   • Measure the diameter of the head bolt 2.17 in. (55mm) from the bottom of the bolt.
     
   • Whenever the size difference between the 2 measurements exceeds 0.0091 in. (0.23mm) the head bolts must be replaced.
     
4. Apply clean engine oil to the bolt threads and seating surfaces and tighten the cylinder head bolts in sequence as follows:
   
   • Step 1: 72 ft. lbs. (98 Nm).
     
   • Step 2: Loosen all the bolts completely.
     
   • Step 2: 29 ft. lbs. (33 Nm).
     
   • Step 4: Plus 75–80 degrees clockwise.
     
   • Step 5: Plus 75–80 degrees clockwise.
     
5. Install the front suspension member and tighten the bolts to the specifications shown in the illustration.
   
6. Install or connect the following:
   
   • 2 steering gear housing mounting bolts
     
   • Lower ball joints
     
   • Front and rear engine mount through bolts
     
   • Upper sway bar links
     
   • A/C compressor
     
   • Auxiliary drive belts
     
   • Power steering pump and reservoir
     
   • Exhaust manifold
     
   • Spark plugs
     
   • Camshafts
     
   • Drive belt tensioner
     
   • Timing chain
     
   • Engine harness and power steering hose bracket
     
   • Fuse hose quick connector at fuel tube side
     
   • All electrical and vacuum lines at the head
     
   • Engine top cover
     
   • Resonator and air cleaner case
     
   • Engine undercover
     
   • Right side fuse/relay box and move aside
     
   • Upper radiator hose and heater hose
     
   • Negative battery cable
     
7. Fill the cooling system and engine oil
   
8. Start the vehicle, check for leaks and repair if necessary.
   

HI. THERES A PLACE TO PLUG THEM IN, DOWN ON THE FRONT HOUSING NEAR THE RIGHT HAND FRONT SPRINGS WHERE THEY BOLT ON THE HOUSING. JIMBO