Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 719 (ENGINE MECHANICAL - 3.8L (UNIT REPAIR))REPAIR INSTRUCTIONSEXHAUST MANIFOLD INSTALLATION - RIGHT

1999 GMC Forward Control 5.7 R, Automatic

Exhaust Manifold Installation - Right

1999 GMC Forward Control 5.7 R, AutomaticSECTION Exhaust Manifold Installation - Right

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to FASTENER NOTICE .

Install the exhaust manifold studs.
Tighten

Tighten the exhaust manifold studs to 10 N.m (89 Ib. in).

Fig 1: Exhaust Manifold Studs
Courtesy of GENERAL MOTORS CORP.
Install the exhaust manifold gasket.
Install the exhaust manifold.
Install the exhaust manifold bolts and nuts.
Tighten

Tighten the exhaust manifold bolts and nuts to 30 N.m (22 Ib. ft).
Install the right side spark plugs.
Tighten
- Tighten the spark plugs to 27 N.m (20 Ib. ft) when installing the spark plugs in to a new cylinder head.
- Tighten the spark plugs to 15 N.m (13 Ib. ft) when re-installing the spark plugs after initial installation.
  
  Fig 2: Exhaust Manifold, Gasket, Bolts & Nuts
  Courtesy of GENERAL MOTORS CORP.
Install the lower right exhaust manifold heat shield.

Fig 3: Lower Right Exhaust Manifold Heat Shield
Courtesy of GENERAL MOTORS CORP.
Install the upper right exhaust manifold heat shield.

Fig 4: Upper Right Exhaust Manifold Heat Shield
Courtesy of GENERAL MOTORS CORP.
Install the fuel injector sight shield cover bracket.
Install the fuel injector sight shield cover bracket nuts.
Tighten

Tighten the fuel injector sight shield bracket nuts to 30 N.m (22 Ib. ft).

Fig 5: Fuel Injector Sight Shield Cover Bracket & Nuts
Courtesy of GENERAL MOTORS CORP.
Install the right engine lift hook.
Install the right engine lift hook nut and bolt.
Tighten

Tighten the right engine lift hook nut and bolt to 30 N.m (22 Ib. ft).

Fig 6: Right Engine Lift Hook, Nut & Bolt
Courtesy of GENERAL MOTORS CORP.
Coat the threads of the heated oxygen sensor with anti-seize compound.
Install the heated oxygen sensor.
Tighten

Tighten the heated oxygen sensor to 42 N.m (31 Ib. ft).
Install the heated oxygen sensor lead.

Fig 7: Heated Oxygen Sensor & Lead
Courtesy of GENERAL MOTORS CORP.

Important: Inspect the EGR outlet pipe for leaks during installation. If leaks are present, replace the EGR adapter assembly.
Install the EGR valve adapter to cylinder head.
Install the EGR valve adapter to cylinder head bolts.
Tighten

Tighten the EGR valve adapter to cylinder head bolts to 50 N.m (37 Ib. ft).
Install the EGR inlet pipe to the exhaust manifold.
Install the EGR inlet pipe bolt.
Tighten

Tighten the EGR inlet pipe bolt to 29 N.m (21 Ib. ft).
Install the EGR outlet pipe to EGR valve adapter.
Install the EGR outlet pipe to EGR valve adapter nut.
Tighten

Tighten the EGR outlet pipe to EGR valve adapter nut to 29 N.m (21 Ib. ft).

Fig 8: EGR Valve Adapter & Bolts, EGR Inlet & Outlet Pipe, Nut & Bolt
Courtesy of GENERAL MOTORS CORP.