Page 410
REPAIR INSTRUCTIONS, PART 2
INSTALLATION PROCEDURE
Clamps used on the hot-side tube are prone to
corrosion and damage and should be replaced. If
the engine is equipped with coupling adapters for
connection of the one-piece cool tube and
coupling hoses, the gas tube clamps can be
reused if there is no damage and the threads are
not corroded. However, with damaged or
corroded threads, the clamps cannot be tightened
to the proper torque specification for a gas-tight
seal.
1. Place the EGR cooler assembly in position
at the right side of the cylinder block
(Figure 496). Install the four retaining nuts
and tighten to specification.
2. Connect the coolant supply and return
hoses at the cooler inlet and outlet tubes.
Install the clamps and tighten to
specification (Figure 495).
3. Slide a hose clamp onto the EGR cooler
cool-tube port (or coupling adapter, if so
equipped).
Early-production engines will have flange-style
coupling adapters in combination with the
one-piece cool tube assembly. On vehicles so
equipped, install the coupling adapter on the
cooler before connecting the cool tube.
앫 Install a new wire-mesh seal in the flange of
the coupling adapter.
앫 Place the coupling adapter flange in position
against the cool-tube port flange. Make sure
the gap between the flanges is uniform, and
install the band clamp. Tighten the clamp to
110 lb-in (12.4 N폷m).
4. Slide the coupling hose onto the cooler
port/adapter and secure with the hose clamp
(Figure 497).
497
Figure 497 — Cool Tube-to-Cooler Installation
5. Install a new wire-mesh seal in the lower
flange of the hot tube and position the flange
against the cooler gas inlet flange
(Figure 498). Make sure the gap between
the flanges is uniform. Install the clamp and
tighten to specification, 110 lb-in (12.4 N폷m).
1. EGR Cooler 2. EGR Gas Cool Tube
Coupling Hose
5-111.bk Page 410 Monday, July 10, 2006 2:26 PM
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