G/H Van (GMT 610) 2005
G/H VAN
(
GMT 610
)
15
PAGE
(Section 8 — continued from previous page)
Check for leaks in exhaust systems and repair as required.
NOTE: The manifold joint take down pipe and converter assembly incorporating oxygen sensors is designed to suit OBD II
requirements, which are dependent upon specific gas leakage rates at the joints. Ideally this assembly should not be
disturbed during the body manufacturing process.
Exhaust gas temperatures can exceed 1600ºF under extreme operating conditions, with pipe surface temperatures slightly less than this.
Extreme care must be used when placing body components in the proximity of the exhaust system so as not to exceed the rated
temperature limits of the components. Due to variants in underbody configurations of the vehicles, General Motors is not in a position to
make recommendations on how to insulate or design components in the proximity of the exhaust system.
Each manufacturer must make temperature checks of critical areas and adjust his design accordingly, or provide shielding to ensure safe
operation of body components.
The same can be said for the engine compartment. Obviously there will be additional heat radiated from the engine. How much is retained
in the area will depend on how well the area is ventilated in your individual designs. Here again, temperature checks of interior areas
surrounding the engine should be made to determine if your insulation is adequate. This is the same engineering practice General Motors
has followed on our complete vehicles incorporating these exhaust systems.
Exhaust system materials are selected and tested to withstand the operating environment of the vehicle. Do not modify the exhaust system
in any way. The tail pipes are made of 409 aluminized stainless steel.
Heat shields are mounted to the chassis, underbody and/or exhaust system components (tail pipe).
Section 9 — Steering
Check power steering fluid level and system operations. (Refer to Owner’s Manual).
Steering wheel and horn pad must not be altered or replaced.
The steering column mast jacket must not be altered.
The steering column must be locked or pinned to prevent rotation when the steering gear or column-to-gear intermediate shaft is
disconnected. Damage to the inflatable restraint control wire can result if this is not done (see Service Manual).
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