Page 74
TROUBLESHOOTING
EGR Cooler, Pressure Test
(Not Applicable for MP8 Euro 3
Engine)
1. Check inside the gas inlet port. If build-up of
soot is seen, perform the EGR cooler
cleaning procedure before checking for
leaks.
2. Lubricate the O-rings on the coolant inlet
and outlet port plugs with a suitable O-ring
lubricant. Install the plugs and cap on the
EGR cooler. Install the plugs on the EGR
cooler coolant inlet and outlet ports. Install
the coupler on the plug and connect the
gauge to the coupler.
Do NOT over-tighten the fasteners on the plugs
and cap.
58
Figure 58 — Installation of Leak Test Kit on Cooler
3. Fill a container with enough water to cover
the EGR cooler.
4. Lower the EGR cooler into the container of
water at room temperature (or fill the cooler
core with water — see NOTE).
59
Figure 59 — Conducting Pressure Test
If a large enough container cannot be obtained,
the EGR cooler can be tested without being
immersed in water by using the test plugs
included with the kit, 88800216-5, to seal the gas
outlet port. The EGR cooler core can then be
filled with water and tested by applying air
pressure to the coolant outlet port as shown in
Figure 60. When using this technique, the cooler
must be tested in the upright position.
To ease the installation of the test plug, coat
the inside of the hose with a suitable O-ring
lubricant.
60
Figure 60 — Test with EGR Gas Outlet Port Plugged
1. 88800216-1
2. 88800216-2
3. Flange Capscrew
4. Flange Nut
5. U-Bolt
6. 9996662
7. 9998333
1. Test Plug, 88800216-5 2. EGR Cooler
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