Torque spects on exaust manifold? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Torque spects on exaust manifold?


9W3-HD
01-11-2005, 11:51 AM
Can one of you techs tell me what the exaust manifold is supposed to be torqued to, and does the gasket need to be replaced if its removed?
thanks,
9W3-HD

9W3-HD
01-12-2005, 11:51 AM
anyone?

Max Payne
01-12-2005, 01:48 PM
Exhaust Manifold Replacement - Right (6.6L Engine)

Removal Procedure


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<LI type=1>Raise the vehicle enough in order to work through the wheelhouse opening. Refer to Lifting and Jacking the Vehicle in General Information. <LI type=1>Remove the wheelhouse panel. Refer to Wheelhouse Panel Replacement in Body Front End. <LI type=1>Remove the front tire and wheel, if necessary. Refer to Tire and Wheel Removal and Installation in Tires and Wheels. <LI type=1>Remove the exhaust manifold heat shield bolts. <LI type=1>Remove the exhaust manifold heat shield.
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<LI type=1>Remove the right exhaust pipe to the exhaust manifold bolts (1).
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<LI type=1>Remove the bolts/nuts from the right exhaust manifold. <LI type=1>Remove the exhaust manifold. <LI type=1>Remove the bolt for the oil level indicator tube bracket in order to remove the exhaust manifold gasket. <LI type=1>Remove and discard the exhaust manifold gasket.
Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection in Engine Mechanical - 6.6L Unit Repair.
Installation Procedure


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<LI type=1>Install the exhaust manifold gasket to the cylinder head. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

<LI type=1>Install the bolt for the oil level indicator tube bracket.
Tighten
Tighten the oil level indicator tube bracket bolt to 21 N·m (15 lb ft).

<LI type=1>Install the exhaust manifold. <LI type=1>Install the exhaust manifold bolts/nuts.
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<LI type=1>Use the sequence shown, properly tighten the exhaust manifold bolts.


Tighten <LI type=a>Tighten the exhaust manifold bolt/nuts a first pass to 34 N·m (25 lb ft).
Tighten the exhaust manifold bolts/nuts a final pass to 34 N·m (25 lb ft).

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<LI type=1>Install the exhaust manifold heat shield. <LI type=1>Install the exhaust manifold heat shield bolts.
Tighten
Tighten the exhaust manifold heat shield bolts to 8 N·m (71 lb in).


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<LI type=1>Install the exhaust pipe gasket. Align the tab on the gasket to face outward. <LI type=1>Install the exhaust pipe bolts (1).
Tighten
Tighten the exhaust pipe to exhaust manifold bolts to 53 N·m (39 lb ft).

<LI type=1>Install the wheelhouse panel. Refer to Wheelhouse Panel Replacement in Body Front End. <LI type=1>Install the front tire and wheel, if necessary. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
Lower the vehicle.

9W3-HD
01-12-2005, 03:49 PM
Wow Max Payne, I was expecting just a simple 25 ft/lbs, you really go the extra mile, thank you!! I didnt remove the manifold completely, I was going to, but just ended up loosening the bolts, changed my mind, so I would imagine the gasket is probably fine?