Hummer H1 (2006+). Manual - part 179
3-58 Fuel, Emissions, and Exhaust
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EXHAUST SYSTEM
The 6.6L turbo diesel exhaust system consists of two cast iron manifolds a turbocharger, turbo down pipe, intermediate pipe,
catalytic converter and tailpipe. All exhaust components are made from stainless steel and assembled using grade 8 hardware.
Service to the exhaust system is replacement only (Figures 3-43 and 3-44).
Figure 3-43: Turbo Diesel
Turbo Down Pipe Replacement
Removal
1.
Remove the engine cover.
2.
Remove the intermediate pipe heat shield.
3.
Remove the exhaust clamps from the turbo to the down pipe, and from the down pipe to the intermediate pipe (Figure 3-44).
4.
Loosen the transfer case to exhaust pipe bracket bolt.
5.
Remove the down pipe and gasket.
6.
Remove all of the gasket material from the intermediate pipe.
Installation
7.
With new gaskets, position the new down pipe on the turbo and intermediate pipe. Tighten the clamps to 11 lb-ft. (15 N·m).
8.
Tighten the exhaust bracket bolt at the transfer case to 26 lb-ft. (35 N·m).
9.
Install the heat shield.
10. Install the engine cover and the console.
11. Start and run the engine. Verify that the exhaust components are clear of the body, frame and driveline components.
Catalytic Converter Replacement
Removal