Egr Valve Installation - Mack MP7 Service Manual

REPAIR INSTRUCTIONS, PART 1
4. Install the exhaust manifold over the
alignment pins. Install the screws and
spacers in the lower holes. Remove the
upper alignment pins one at a time and
install the screws and spacers.
346
Figure 346 — Exhaust Manifold Installation
5. Using a torque wrench, tighten the screws
and stud in two steps according to
specification.
6. Assemble the EGR heat shields on the
cylinder head and manifold studs.
7. Using a torque wrench, tighten the screws
and nut according to specification.

EGR Valve Installation

[214 QE]
Clean the four threaded holes in the exhaust
manifold for the EGR valve mounting bolts. Use
care when cleaning components of the EGR
system. Dirt and debris could cause blockage
within the cooler core or EGR valve. Failure to
heed this caution may result in severe engine
damage.
1. Assemble the attaching screws in the EGR
valve body.
Always use new screws when installing the EGR
valve.
2. Assemble the gasket on the attaching
screws.
3. Install the EGR valve on the exhaust
manifold.
4. Using a torque wrench, tighten the screws in
a crisscross pattern according to
specification.
5. Install and tighten the EGR valve oil supply
line according to specification.
6. Install and tighten the EGR valve oil return
line according to specification.
7. Connect the wiring harness lead to the EGR
valve.
347
Figure 347 — EGR Valve Installation
1. EGR Valve Assembly
2. EGR Cooler Inlet Pipe
3. EGR Cooler Inlet Pipe
Clamps
4. EGR Cooler
5. EGR Solenoid Terminal
6. Oil Inlet Tube
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