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Exhaust Manifold To Cylinder Head - 9.58 ft lbs
Exhaust Pipe To Exhaust Manifold - 20 ft lbs
you can check it out here, also all other torque specs for your engine. Torque Specs Database
Before servicing the vehicle, refer to the Precautions Section.
Drain the cooling system.
Properly relieve the fuel system pressure.
Remove or disconnect the following:
Negative battery cableExhaust manifoldAlternatorWater crossoverIntake manifoldValve coverTiming coverSecondary camshaft drive chainPower steering return hose retaining bolt from the cylinder head3 M6 external drive bolts from the front portion of the cylinder head10 M11 internal drive cylinder head boltsCylinder head and gasket.
Clean the head mating surfaces.
To install:
Fig. Left cylinder head bolt torque sequence-4.6L engine
Install the cylinder head with a new gasket. Lubricate the bolts with engine oil prior to installation.
Torque the M11 bolts in sequence as follows:
Step 1: 30 ft. lbs. (40 Nm), plus an additional 70 degrees
Step 2: Turn an additional 60 degrees
Step 3: Turn an additional 60 degrees (total 190 degrees)
Torque the M6 bolts to 106 inch lbs. (12 Nm)
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 chainTiming coverValve coverIntake manifoldWater crossoverExhaust manifoldNegative battery cable
Change the oil and filter.
Fill the cooling system.
Right Side
Before servicing the vehicle, refer to the Precautions Section.
Drain the cooling system.
Properly relieve the fuel system pressure.
Remove or disconnect the following:
Negative battery cableExhaust manifoldWater crossoverIntake manifoldValve coverTiming coverSecondary camshaft drive chainElectrical connector from the Engine Coolant Temperature (ECT) sensorNut attaching the coil cassette ground wire to the cylinder headBolt attaching the exhaust crossover pipe to the cylinder headBolt attaching the right transaxle mount bracket to the cylinder headBolt attaching the rear transaxle brace to the transaxleNuts attaching the rear transaxle brace to the cylinder headRear transaxle brace3 M6 external drive bolts from the front portion of the cylinder head10 M11 internal drive cylinder head boltsCylinder head and gasket
Clean the head mating surfaces.
To install:
Fig. Right cylinder head bolt torque sequence- 4.6L engine
Install the cylinder head with a new gasket. Lubricate the bolts with engine oil prior to installation.
Torque the M11 bolts in sequence as follows:
Step 1: 30 ft. lbs. (40 Nm), plus an additional 70 degrees.
Step 2: Turn an additional 60 degrees.
Step 3: Turn an additional 60 degrees (total 190 degrees).
Torque the M6 bolts to 106 inch lbs. (12 Nm).
Install or connect the following:
Rear transaxle brace over the studs located at the rear of the right cylinder headNuts attaching the rear transaxle brace to the cylinder head, looselyBolts 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 sensorBolt 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 chainTiming coverValve coverIntake manifoldWater crossoverExhaust manifoldNegative battery cable
Hi Don. Is a shop doing the gasket replacement or was it a D.I.Y. thing? I ask because the problem may very well be a warped/cracked exhaust manifold, or worse a cylinder head issue. If your doing this yourself, perhaps remove the exhaust manifold and take it to a shop to be checked for warpage or cracks, and simply repace it (along with a new gasket of course) if yours is found to be faulty. Also, use new hardware ( studs/bolts) to install the manifold and torque to proper torque specs. Proper torque is important.
1. Drain the coolant and disconnect the upper radiator hose. 2. Remove the breather hose (between the air cleaner and the head cover). 3. Remove the air-intake hose. 4. Remove the vacuum hose, fuel hose and coolant hose. 5. Remove the cables from the spark plugs. The cables should be removed by holding the boot portion. 6. Remove the ignition coil. 7. Remove the power steering oil pump and bracket. 8. Remove the intake manifold. 9. Remove the heat protector and exhaust manifold assembly. 10. Remove the coolant pump pulley and the crankshaft pulley. 11. Remove the timing belt cover. 12. Remove the timing belt tensioner pulley. 13. Remove the timing belt. 14. Remove the head cover.
15. Remove the cylinder head assembly. The cylinder head bolts should be removed by using Special Tool, Cylinder Head Bolt Wrench (09221-32001) or equivalent, in the sequence as shown in the illustration in two or three steps. 16. Remove the gasket pieces from the cylinder block top surface and cylinder head bottom surface. NOTE: Make sure that the gasket pieces do not fall in the engine.
INSTALLATION
1. Clean all gasket surfaces of the cylinder block and the cylinder head. 2. Install a new cylinder head gasket onto the cylinder head assembly. Apply sealant to the gasket and do not reuse the old cylinder head gasket.
3. Install the cylinder head bolts. Starting at top center, tighten all cylinder head bolts in sequence as shown in illustration, using the Cylinder Head Bolt Wrench (09221 - 32001) or equivalent. Repeat the procedure, re-tightening all cylinder head bolt to the specified torque. (torque spec is Cold Engine 105-115 Nm (76-83 ft lb) ) 4. Install the timing belt tensioner pulley. 5. Install the timing belt on the camshaft sprocket, making sure that the tension side is tightened by turning the camshaft sprocket in reverse, all timing marks are in alignment. 6. Adjust the timing according to "Timing Belt" 7. Install the rocker cover and tighten the bolts to the specified torque. Tightening torque: Rocker cover belt:
2.5-3.5 Nm (25-35 kg.cm, 2-3 ft. lbs.)
8. Install the timing belt cover. 9. Install the new intake manifold gasket and the intake manifold. Tighten the nuts and bolts to the specified torque. 10. Install the new exhaust manifold gasket and the exhaust manifold. Tighten the exhaust manifold attaching nuts to the specified torque. 11. Install the surge tank and tighten the nuts bolts to the specified torque. 12. Install the power steering oil pump and bracket. 13. Install the ignition coil. 14. Install the air intake hose. 15. Connect the vacuum hose, fuel hose and water hose. 16. Install breather hose.
Install the cylinder head bolts. Starting at top center, tighten all
cylinder head bolts in sequence as shown in illustration, using the
Cylinder Head Bolt Wrench (09221 - 32001) or equivalent. Repeat the
procedure, re-tightening all cylinder head bolt to the specified torque.
(torque spec is Cold Engine 105-115 Nm (76-83 ft lb) )
. Install the timing belt tensioner pulley.
. Install the timing belt on the camshaft sprocket, making sure that
the tension side is tightened by turning the camshaft sprocket in
reverse, all timing marks are in alignment.
. Adjust the timing according to "Timing Belt"
. Install the rocker cover and tighten the bolts to the specified torque. Tightening torque: Rocker cover belt:
2.5-3.5 Nm (25-35 kg.cm, 2-3 ft. lbs.)
. Install the timing belt cover.
Install the new intake manifold gasket and the intake manifold. Tighten the nuts and bolts to the specified torque.
Install the new exhaust manifold gasket and the exhaust manifold.
Tighten the exhaust manifold attaching nuts to the specified torque.
. Install the surge tank and tighten the nuts bolts to the specified torque.
. Install the power steering oil pump and bracket.
. Install the ignition coil.
. Install the air intake hose.
Connect the vacuum hose, fuel hose and water hose.
. Install breather hose.
New cylinder head bolts coated with a sealant (such as GM 1052080).
Torque the bolts in the proper sequence (1-8) to 37 ft. lbs. (50 Nm).
Using a torque angle meter turn the bolts 90 degrees in the proper
sequence.
Left side exhaust manifold. Torque the bolts to 12 ft. lbs. (16 Nm).
Spark plugs. Torque the plugs 11 ft. lbs. (15 Nm).
Right side rear cylinder head:
Cylinder head bolt torque sequence-3.4L engine
New cylinder head gasket
Cylinder head on top of the gasket and make certain it is lined up properly with the dowel pins
New cylinder head bolts coated with a sealant (such as GM 1052080).
Torque the bolts in the proper sequence (1-8) to 37 ft. lbs. (50 Nm).
Using a torque angle meter turn the bolts 90 degrees in the proper
sequence.
Right side exhaust manifold. Torque the bolts to 12 ft. lbs. (16 Nm).
Spark plugs. Torque the plugs 11 ft. lbs. (15 Nm).
Spark plug wires
Exhaust crossover pipe. Torque the fastener to 18 ft. lbs. (25 Nm).
Valve rocker arms and pushrods. Torque the fastener to 89 inch lbs. (10
Nm). Using a torque angle meter torque the fastener an additional 30
degrees.
Lower intake manifold. Torque the bolts to 115 inch lbs. (13 Nm).
Upper intake manifold. Torque the bolts to 18 ft. lbs. (25 Nm).
If removing the right cylinder head, remove the catalytic converter from exhaust manifold.
If removing the left cylinder head, remove the engine oil dipstick and tube.
Remove the rocker arms and pushrods.
Remove and discard the cylinder head bolts.
Remove the cylinder head.
Clean the mating surfaces on the following items:
Cylinder head
Cylinder block
Intake manifold
Clean the cylinder block bolt threads.
NOTE: During disassembly, keep the valve train components together for proper location during assembly. To Install: NOTE: Coat the cylinder head bolt threads using thread sealer.
If removed, install the following components:
Exhaust manifold
Accessory studs
Spark plugs
Place the cylinder head gasket in position over the dowel pins. Ensure that the THIS SIDE UP note is showing.
Install the cylinder head.
Cylinder head torque sequence ’99-‘00
Cylinder head torque sequence ’01-05
Install the new cylinder head bolts.
Tighten the cylinder head bolts a first pass to 44 ft lb (60 Nm).
Tighten the cylinder head bolts in sequence an additional 95 degrees.
Install the intake gasket.
Install the pushrods and rocker arms.
Raise and support the vehicle.
Install the catalytic converter and dipstick tube and indicator if removed.
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