Air Intake and Exhaust System
Removing Intake Manifold
4. Remove six cap screws and remove intake
IMPORTANT: All intake manifold connections at
manifold from cylinder head. Remove and discard
the turbocharger and engine cylinder
head must be tight to prevent loss of
power resulting from lack of intake
5. Inspect the intake manifold for serviceability.
Replace if it is cracked or otherwise damaged.
Intake manifold hose and cap screw connections
6. Inspect the machined mating surfaces of cylinder
should be inspected periodically for tightness.
head and intake manifold. Clean, as required, by
using a scraper and/or wire brush, and compressed
Whenever a tune-up has been performed on the
engine, or whenever it is suspected that the
horsepower output might be low, the intake manifold
7. To install intake manifold, reverse removal
pressure (turbo-boost) should be checked. (See
procedures and use new gaskets.
CTM134, Group 110.)
8. Tighten intake manifold cap screws to 47 N·m
1. Remove exhaust manifold, shown removed. (See
REMOVE, INSPECT, AND INSTALL EXHAUST
MANIFOLD, earlier in this group.)
9. Install exhaust manifold assembly and turbocharger
as detailed earlier in this group.
2. Remove air intake connections from intake manifold
(A) as detailed in machine Technical Manual.
10. Connect all air intake and exhaust piping. (For
vehicle engines, refer to machine Technical
3. Disconnect air heater wire from manifold, if