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Re: why is there oil in my Dodge Intrepid intake manifold...
Sounds like John is a man who knows what he is talking about. It may be that the next step would be a compression test to try to zero in on confirming the problem.
I would also suggest that a route for oil to get into the intake manifold would be through the PCV valve and hose. It might be a good idea to thoroughly clean them to make sure they're working properly. If you're into playing mechanic, pulling the sparkplugs and doing a cylinder health analysis based on plug condition can be a great project for a rainy day.
How many miles/km on the vehicle? Do you know much about the maintenance history?
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Use a skin coat of RTV silicone on both sides of the water passage ports (outer most holes) and put the new lower intake gaskets into place
Hand tighten the 13mm head intake bolts and Torque the bolts , starting from the center and working your way out in a circular pattern
Torque these bolts in a few small increments until they have reached 250 inch pounds of torque.
Upper Intake Plenum:
When installing the intake air plenum , be sure to catch the four center bolts and the two side bolts (stiffener brackets) before tightening , The center bolts should be torqued to 250 inch pounds .The fuel rail bolts should be torqued to 100 inch pounds
Well basically, you remove the intake plenum and replace the gasket and reinstall the plenum. Here are the steps:
1. Disconnect the negative battery cable from the remote jumper terminal located at the right strut tower. 2. Remove the air inlet resonator and tube. 3. Remove the throttle actuator cables from the throttle arm and bracket. 4. Disconnect Secondary Runner Valve (SRV), Manifold Tuning Valve (MTV), Throttle Position Sensor (TPS), Idle Air Control (IAC) motor electrical connectors. 5. Remove the electrical connector and the Intake Air Temperature/Manifold Absolute Pressure (TMAP) sensor. 6. Disconnect vacuum hoses from the Secondary Runner Valve (SRV) reservoir, Speed Control reservoir, and PCV. 7. Remove right and left intake manifold supports. 8. Remove support brackets at the intake manifold front corners and MTV. 9. Loosen upper fastener attaching throttle body to support bracket. 10. Remove clips attaching EGR tubes to intake manifold. 11. Remove intake manifold bolts and manifold 12. Remove old gaskets, Clean gasket surfaces, and install new gaskets. 13. Reverse steps to reinstall manifold
Well, it's definitely on the intake manifold somewhere. On a Chrysler 2.5L v-6, the IAT is on the upper intake manifold, at the front of the engine (the farthest point from where air enters the intake). This is a transverse engine, but your IAT should be on the intake or plenum.
Exactly what is the wrong? Need the part? Need to know torque adjust or porcedure to take off? For 1994 Pontiac Grand Am 3.1L SFI OHV 6cyl check this procedure for Intake Manifold... (see Figure 14) The 3.1L engine is equipped with upper and lower intake manifolds.
The upper intake manifold is also known as the intake manifold plenum.
The fuel system is under pressure and must be properly relieved
before disconnecting the fuel lines. Failure to properly relieve the
fuel system pressure can lead to personal injury and component damage.
Relieve the fuel system pressure.
Disconnect the negative battery cable.
Remove top half of the air cleaner assembly and throttle body duct.
Drain and recycle the engine coolant.
Disconnect the EGR pipe from exhaust manifold.
Remove the serpentine belt.
Remove the brake vacuum pipe at the intake plenum.
Disconnect the control cables from the throttle body and intake plenum mounting bracket.
Remove the power steering lines at the alternator bracket.
Remove the alternator.
Label and disconnect the ignition wires from the spark plugs and wire retainers on the intake plenum.
Remove the ignition assembly and the EVAP canister purge solenoid together.
Fig. 14: View of the intake manifold and related components
Disconnect the upper engine wiring harness connectors at the following components:
Throttle Position Sensor (TPS)
Idle Air Control (IAC)
Coolant temperature sensor
Manifold Absolute Pressure (MAP) sensor
Camshaft Position (CMP) sensor
Tag and disconnect the vacuum lines from the following components:
Fuel pressure regulator
Disconnect the MAP sensor from upper intake manifold.
Remove the upper intake plenum mounting bolts and lift off the plenum.
Disconnect the fuel lines from the fuel rail and bracket.
Install engine support fixture special tool J 28467-A or an equivalent.
Remove the right side engine mount.
Remove the power steering mounting bolts and support the pump out of the way without disconnecting the power steering lines.
Disconnect the coolant inlet pipe from the outlet housing.
Remove the coolant bypass hose from the water pump and the cylinder head.
Disconnect the upper radiator hose at thermostat housing.
Remove the thermostat housing.
Remove both rocker arm covers.
Remove the lower intake manifold bolts. Make sure the washers on
the four center bolts are installed in their original locations.
When removing the valve train components they should be kept in order for installation the original locations.
Remove the rocker arm retaining nuts or bolts and extract the rocker arms and pushrods.
Remove the intake manifold from the engine. Remove and discard the gasket.
Using a suitable scraper, clean gasket material from all mating
surfaces. Remove all excess RTV sealant from front and rear ridges of
Place a 0.12 inch (3mm) bead of RTV, on each ridge, where the front and rear of the intake manifold contact the block.
Using a new gasket, place the intake manifold on the engine.
Install the pushrods in their original locations. Coat the pushrods with prelube.
The intake pushrods are marked yellow (5
/4 inch long) and the exhaust are green (6 inches long).
Make sure the pushrods are properly seated in the valve lifters and
Position the rocker arms in there original locations and tighten
to specifications. Refer to the procedure earlier in this section.
Install lower the intake manifold attaching bolts. Apply sealant
12345739 (or equivalent thread locking compound) to the threads of
bolts. Tighten the vertical bolts first then the diagonal bolts to 115
inch lbs. (13 Nm).
Install the front rocker arm cover.
Install the thermostat housing.
Connect the upper radiator hose to the thermostat housing.
Fasten the coolant inlet pipe to thermostat housing.
Connect coolant bypass pipe at the water pump and cylinder head.
Install the power steering pump in the mounting bracket.
Loosely install the serpentine belt.
Connect the right side engine mount.
Remove the special engine support tool.
Fasten the fuel lines to fuel rail and bracket.
Install the upper intake manifold and tighten the mounting bolts to 18 ft. lbs. (25 Nm).
Install the MAP sensor.
Connect the upper engine wiring harness connectors to the related components removed earlier.
Connect the vacuum lines to the PCV, vacuum modulator and fuel pressure regulator.
Install the EVAP canister purge solenoid and ignition assembly.
Install the alternator assembly.
Connect the power steering line to the alternator bracket.
Install the serpentine belt.
Connect the spark plug wires to the spark plugs and intake plenum wire retainer.
Install the EGR pipe to the exhaust manifold.
Attach the control cables to the throttle body lever and upper intake plenum mounting bracket.
Install air intake assembly and top half of the air cleaner assembly.
Install the brake vacuum pipe.
Fill the cooling system.
Connect the negative battery cable, then start the vehicle and verify that there are no leaks.