Question 1

How to remove and install the intake manifold in V6 engine on Lincoln Navigator?

Accepted Answer

Before unplugging the MI, the fuel pressure must be cut off and the air duct assembly should be discontinued, and the negative terminal of the battery should be disconnected. Remove the upper intake plenum and throttle body, disconnect IMRC vacuum and electrical connectors, fuel lines, fuel pressure regulator and injector connectors and drain the cooling system. Place a shop towel over the air intake openings to block dust from getting into the engine, and remove the upper radiator hose, and the heater hoses connected to the intake manifold. Remove the EGR valve vacuum hose and EGR tube fitting at the EGR valve; label and remove ECM vacuum and emissions hoses and wire harness connectors connected to the intake manifold. Tighten the intake manifold mounting bolts by a quarter turn at a time as many as possible until they can be removed with the hands; in all, there are fourteen of the bolts. If it is stuck to the cylinder heads, use the prybar to pull apart the gaskets, again, make sure that all bolts have been pulled out and do not pry between the engine block and the intake manifold as you will cause some damage. For installation, the mating surfaces of the cylinder heads, engine block and manifold must be clean, perhaps using gasket removal solvents. Pull off the old gasket with a gasket scraper, then wash the surface with lacquer thinner or acetone, and cover the lifter valley with shop rags to avoid contaminate. Take a tap and chase the threads in the bolt holes and blow with compressed air to remove any dirt. The surfaces of the gaskets should be checked before placing a 1/8-inch-wide bead of RTV sealant on the front and the rear of the block surface after which one of the rubber seals for the front and rear manifolds need to be put in place. Put a small amount of RTV at the locations where side gaskets are to abut the end seals, place the side gaskets at the cylinder heads, and check if openings are in the right position. Gently install the manifold in place while the sealant is still wet which will minimize distortion of the gaskets. The manifold bolts should only be lightly oiled and then screwed and tightened to the correct torque setting in turns. Last, turn on the engine and look for signs of oil and coolant leakage at the gasket joint of intake manifold.

Question 2

How to remove and install the intake manifold in V6 engine on Lincoln MKX?

Accepted Answer

Pull out the KL25Z board from the engine compartment and unscrew the engine cover, then disconnect the black cable from the battery. Then, remove air filter housing and hoses and now loose the clamps for the removal of right-hand air filter housing outlet pipe and Charge Air Cooler intake pipe. Disconnect the quick connect fittings external to the crankcase at both ends of the PCV tubes, unscrew the electrical connector of the crankcase pressure sensor on the left side of the PCV tube and then pull out both the tubes. Disconnect the purge valve hoses and the valve while the harness must be relocated aside, then disconnect the vacuum pressure sensor mounting bolt and the sensor along with the intake manifold. Those electrical/vacuum harness retainers/connectors that interfere with the access must be moved out of the way if required and then the manifold has to be disconnected by the removal of manifold mounting bolts. For removal, first remove the manifold bolts and then use a screwdriver or a pick to remove the gaskets from the manifold; to install use the precise sequence of removal, clean the surfaces of the manifold to remove the gasket residues, place fresh gaskets and bolt the manifold in place by tightening the bolts in the sequence stated. The process of installation is carried out based on the inverted sequence of the removal process. For the upper intake manifold on 3.5L and 3.7L engines remove the PCM electrical connectors and relocate the harnesses aside, the EVAP canister vent solenoid, the throttle body electric connectors and unplugging the line from the EVAP canster vent solenoid, brake booster vacuum hose and crankcase vent hose. Insert the small allen head bolts loosely to hold the lower intake in place then unplug the crankcase ventilation, purged fuel rail vacuum lines, unplug the IAC valve connector and remove some of the alternate fuel injector bolts and lower the intake carefully at a time and the manifold has to be separated from the engine without using a hammer, the intake ports must be covered by clean shop rags. For service, the gaskets must be removed, the mating surfaces blanked off, new gaskets secured, and the manifold and bolts must be remounted and tightened in a specific pattern. Disassembly, on the other hand, is carried out in a sequence that is exactly the opposite of how ProRE installer works. For the lower intake manifold it is necessary to: first to remove the upper intake manifold, next to drain the cooling system, to cover the drivebelt with a plastic wrap, then to remove the thermostat housing while disconnecting the heater hose from the manifold. To remove the fuel injectors you also need to remove the fuel line from the fuel rail and the electrical connectors from the injectors. When it has been tightened in the sequence 3,1,2,3 release the intake manifold mounting bolts in one quarter turn each in the sequence 3,1,2,3 until they are easily removable. For service dismantle the gaskets that are placed in the grooves in the manifold, clean the mating surfaces to fit the new gaskets snugly, put the manifold in place and tighten the bolts to specified torque in the advised order. The rest of the procedure is conducted in the reverse manner to the removal and the cooling system is refilled and the engine started, looking for any oil or coolant leaks at the intake manifold gasket joints.

OEM Lincoln Intake Manifold

41 Intake Manifolds found

Lincoln Intake Manifold Part Number: 3W7Z-9424-AE

Lincoln Intake Manifold Part Number: 9L3Z-9424-H

Lincoln Intake Manifold Part Number: DS7Z-9424-L

Lincoln Intake Manifold Part Number: K2GZ-9424-A

Lincoln Intake Manifold Part Number: CJ5Z-9424-G

Lincoln Intake Manifold Part Number: 9E5Z-9424-C

Lincoln Intake Manifold Part Number: 9W7Z-9424-A

Lincoln Intake Manifold Part Number: 2L1Z-9424-AA

Lincoln Intake Manifold Part Number: LX6Z-9424-A

Lincoln Intake Manifold Part Number: 2L7Z-9424-DA

Lincoln Intake Manifold Part Number: DG1Z-9424-A

Lincoln Intake Manifold, Upper Part Number: FT4Z-9424-D

Lincoln Intake Manifold, Lower Part Number: 3F1Z-9424-AC

Lincoln Intake Manifold 0 Part Number: 6W7Z-9424-AA

Lincoln Intake Manifold, Upper Part Number: AT4Z-9424-A

Lincoln Intake Manifold, Upper Part Number: 7T4Z-9424-D

Lincoln Intake Manifold Part Number: 5L1Z-9424-A

Lincoln Intake Manifold Part Number: 2L7Z-9424-CA

Lincoln Intake Manifold Part Number: F85Z-9424-BA

Lincoln Intake Manifold Part Number: 1X4Z-9424-AA

Lincoln Intake Manifold

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