I need to remove the exhaust manifold on the right side of a 94 4.9l engine in a cadillac deville. It has a broken bolt in the exhaust. What is involved in removing the manifold?

Have to remove the bolt from the motor mount on right side and loosen the bolts on the left side motor mount, jack engine up on right side until you get enough clearance to slide pan out, hopefully your exhaust system will not get in the way to where you have to remove that also.

First, Jack the car up in the front, remember to put wood block behind the rear wheels. Disconnect the battery. Get a ground clothlarge enough for all of you to lay on. The starter in behind the exhaust manifold on the right side of the engine. Make sure engine is cold as manifold will burn you badly. Disconnect wiring, unbolt and twist it down. It pulls out once bolts are removed

DeVille, Eldorado, Seville 1999-2005

• REMOVAL & INSTALLATION

Cylinder Head

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Removal & Installation

Left Side

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system.
3. Properly relieve the fuel system pressure.
4. Remove or disconnect the following:
   
   Negative battery cable Exhaust manifold Alternator Water crossover Intake manifold Valve cover Timing cover Secondary camshaft drive chain Power steering return hose retaining bolt from the cylinder head 3 M6 external drive bolts from the front portion of the cylinder head 10 M11 internal drive cylinder head bolts Cylinder head and gasket.
   
5. Clean the head mating surfaces.

To install:

Fig. Left cylinder head bolt torque sequence-4.6L engine

1. Install the cylinder head with a new gasket. Lubricate the bolts with engine oil prior to installation.
2. Torque the M11 bolts in sequence as follows:
   1. Step 1: 30 ft. lbs. (40 Nm), plus an additional 70 degrees
   2. Step 2: Turn an additional 60 degrees
   3. Step 3: Turn an additional 60 degrees (total 190 degrees)
   
   
3. Torque the M6 bolts to 106 inch lbs. (12 Nm)
4. Install or connect the following:
   
   Power steering return hose retaining bolt to the cylinder head and tighten to 37 ft. lbs. (50 Nm) Secondary camshaft drive chain Timing cover Valve cover Intake manifold Water crossover Exhaust manifold Negative battery cable
   
5. Change the oil and filter.
6. Fill the cooling system.

Right Side

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system.
3. Properly relieve the fuel system pressure.
4. Remove or disconnect the following:
   
   Negative battery cable Exhaust manifold Water crossover Intake manifold Valve cover Timing cover Secondary camshaft drive chain Electrical connector from the Engine Coolant Temperature (ECT) sensor Nut attaching the coil cassette ground wire to the cylinder head Bolt attaching the exhaust crossover pipe to the cylinder head Bolt attaching the right transaxle mount bracket to the cylinder head Bolt attaching the rear transaxle brace to the transaxle Nuts attaching the rear transaxle brace to the cylinder head Rear transaxle brace 3 M6 external drive bolts from the front portion of the cylinder head 10 M11 internal drive cylinder head bolts Cylinder head and gasket
   
5. Clean the head mating surfaces.

To install:

Fig. Right cylinder head bolt torque sequence- 4.6L engine

1. Install the cylinder head with a new gasket. Lubricate the bolts with engine oil prior to installation.
2. Torque the M11 bolts in sequence as follows:
   1. Step 1: 30 ft. lbs. (40 Nm), plus an additional 70 degrees.
   2. Step 2: Turn an additional 60 degrees.
   3. Step 3: Turn an additional 60 degrees (total 190 degrees).
   
   
3. Torque the M6 bolts to 106 inch lbs. (12 Nm).
4. Install or connect the following:
   
   Rear transaxle brace over the studs located at the rear of the right cylinder head Nuts attaching the rear transaxle brace to the cylinder head, loosely Bolts attaching the rear transaxle braces to the transaxle and tighten to 37 ft. lbs. (50 Nm) Nuts attaching the rear transaxle brace to the cylinder head and tighten 37 ft. lbs. (50 Nm) Electrical connector to the ECT sensor Bolt attaching the exhaust crossover pipe to the cylinder head and tighten to 18 ft. lbs. (25 Nm) Nut attaching the coil cassette ground wire to the cylinder head and tighten to 13 ft. lbs. (17 Nm) Secondary camshaft drive chain Timing cover Valve cover Intake manifold Water crossover Exhaust manifold Negative battery cable
   
5. Change the oil and filter.
6. Fill the cooling system.

Bank 1 is the side with the #1 cylinder, In your car it is the bank that is nearest the firewall. Sensor 1 will be the one BEFORE the catalytic convertor, or nearest the engine in the exhaust manifold or pipe.

The Oxygen Sensor is located: Under hood, center, front engine area, above exhaust pipe flange, mounted in exhaust manifold
Application: Front

Under hood, center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold
Application: Rear

I hope helps (remember to rate this). Good luck.

under intake manifold

4.6L Engine Except Seville

1. Disconnect the negative battery cable.
2. Remove the cover from the headlamps and radiator shroud.
3. Remove the air cleaner, if necessary.
4. Disconnect the left engine torque strut from the radiator support.
5. Disconnect the upper trans oil cooler line from the trans cooler.
6. Remove the right cooling fan and the left cooling fan.
7. Remove the serpentine belt from the generator pulley.
8. Remove the bolt from the front top of the generator, and the bolt from the lower front of the generator.
9. Detach the harness connector and output cable from the generator.

NOTE The bolt nearest the exhaust manifold cannot be removed from the bracket but can be backed out to allow for removal of the generator.

1. Removal the A/C splash shield from the cradle, and the access panel from the bottom side of the radiator support.
2. Disconnect the engine harness from the cradle.

NOTE The generator can be moved out away from the engine and removed from the bottom side of the engine compartment.

1. Connect the negative battery cable.

Right-Hand
Removal

1. Remove spark plug heat shield (12A406).
   

1. Remove distributor to spark plug wires (12286) using Spark Plug Wire Remover T74P-6666-A.
   
1. Disconnect muffler inlet pipe.
   
1. If equipped with secondary air injection, disconnect the secondary air injection check valve tube (9B480).
   
1. Remove attaching bolts and right exhaust manifold (9430).
   
1. Inspect joint faces for signs fo exhaust leaks, cracks or any defect that would make exhaust manifold unfit for use
   

Left-Hand Removal






1. Remove oil level indicator tube (6754).

1. Remove spark plug heat shield.
   

1. Remove distributor to spark plug wires using Spark Plug Wire Remover T74P-6666-A.
   

1. Disconnect EGR valve to exhaust manifold tube (9D477). If equipped with air injection, disconnect the secondary air injection check valve tube.
   

1. Disconnect muffler inlet pipe.
   

1. Remove attaching bolts and exhaust manifold (9431).
   

1. Inspect joint faces for signs of exhaust leaks, cracks or any defect that would make the exhaust manifold unfit for use.
   

Installation

1. Clean mating surfaces of right exhaust manifold or left exhaust manifold and cylinder head (6049). Clean mounting flange of right exhaust manifold or left exhaust manifold and inlet pipe(s). Clean mounting surface for air injection tube or right exhaust manifold. Apply light film of Premium Long-Life Grease XG-1-C or -K or equivalent meeting Ford specification ESA-M1C75-B to right exhaust manifold or left exhaust manifold.
   

1. Position right exhaust manifold or left exhaust manifold on cylinder head. Install attaching bolts and washers, starting at fourth bolt hole from front of each right exhaust manifold or left exhaust manifold. Tighten bolts to 34-47 Nm (25-35 lb-ft), working from center right to both ends.
   
1. Position inlet pipes to right exhaust manifold or left exhaust manifold. Install attaching nuts and tighten to 34-47 Nm (25-35 lb-ft).
   
1. Position the secondary air injection check valve tube and the secondary air injection tube gasket (9C435) at rear of right-hand exhaust manifold. Install attaching bolts and tighten to 19-25 Nm (14-18 lb-ft).
   
1. Attach the secondary air injection manifold tube (9B449) to left-hand exhaust manifold fitting (located under EGR tube). Tighten nut to 30-40 Nm (22-30 lb-ft).
   
1. Attach the secondary air injection check valve tube to rear of right-hand cylinder head. Tighten bolts to 75-85 Nm (56-62 lb-ft).
   
1. Connect EGR valve to exhaust manifold tube to left exhaust manifold, if removed. Tighten nut to 53-72 Nm (39-53 lb-ft).
   
1. Install spark plug heat shield and distributor to spark plug wires.
   
1. Install oil level indicator tube to left exhaust manifold, if removed. Tighten nut to 13-24 Nm (10-18 lb-ft).
   
2. Start engine (6007) and check for exhaust leaks.
   

Hope this helps you...WF †

No it

hi im wesall o2 sensors are located in the exaust system yours has one before the converter one after if it has duall exaust before the cat on drivers side will be upstream sensor bank 1 after cat right side will be bank 2 sensor 2
thanks wes
ps please rate me