2001 SUZUKI GRAND VITARA Exhaust manifold torque

ENGINE MECHANICAL (H27 ENGINE) 6A2-11
INSTALLATION
1) Install new manifold gaskets to cylinder heads and No.1 pipe
gasket to exhaust No.1 pipe.
2) Install exhaust manifolds.
•Always install new bolts with pre-coated adhesive to the
locations with ✱ mark.
•Tighten both manifold nuts and bolts to specified torque.
Tightening torque
Exhaust manifold bolt and nut (a) :
30 N·m (3.0 kg-m, 21.5 lb-ft)
3) Install stabilizer bar if it was removed. Refer to “STABILIZER
BAR / BUSHINGS” in Section 3D.
4) Install exhaust manifold stiffeners (if removed).
5) Install exhaust No.1 pipe (1).
Tighten exhaust No.1 pipe bolts to specified torque.
Tightening torque
Exhaust No.1 pipe bolt (b) :
50 N·m (5.0 kg-m, 36.5 lb-ft)
6) Tighten exhaust No.1 pipe nuts to specified torque.
Tightening torque
Exhaust No.1 pipe nut (b) :
50 N·m (5.0 kg-m, 36-5 lb-ft)
1. Left (No.1) exhaust manifold
2. Right (No.2) exhaust manifold
2. Exhaust No. 2 pipe
1. Exhaust No.1 pipe
2. Exhaust manifold
A. Without WU-TWC
B. With WU-TWC

6A2-12 ENGINE MECHANICAL (H27 ENGINE)
7) Reverse removal procedure to install front propeller shaft if
removed.
When installing propeller shaft, align match mark (1).
Use following specification to torque universal joint flange.
Tightening torque
Universal joint flange bolt (c) :
55 N·m (5.5 kg-m, 40.0 lb-ft)
8) Connect EGR pipe to left (No.1) bank exhaust manifold (1).
9) Install exhaust manifold covers (2).
10) Install oil level gauge guide (3) using new O-ring.
11) Install P/S pump assembly (4) if it was removed. Refer to
“POWER STEERING PUMP” in Section 3B1.
12) Adjust P/S pump drive belt tension, refer to “POWER
STEERING BELT CHECK AND ADJUSTMENT” in Section
3B1.
13) Connect oxygen sensor lead wire couplers.
Be sure to clamp its lead wires.
14) Connect negative (–) cable to battery.
Upon completion of installation, start engine and check that
no exhaust gas leakage exists.
1
4
32
1. HO2S-1 (Green connector)
2. HO2S-2 (Black connector)

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-37
Heated oxygen sensor (sensor 1)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Disconnect coupler of oxygen sensor (s).
3) Remove oxygen sensor (s) from exhaust manifold (s).
INSTALLATION
Reverse removal procedure noting the followings.
•Tighten oxygen sensor (s) to specified torque.
Tightening torque
Heated oxygen sensor 1
(a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
•Connect connector of oxygen sensor (s) and clamp wire har-
ness securely.
•After installing oxygen sensor (s), start engine and check
that no exhaust gas leakage exists.
INSPECTION
Inspect HO2S-1 and its circuit referring to “DTC P0130 or P0150
Diag. Flow Table” in Section 6-1. If malfunction is found, replace. WARNING:
To avoid danger of being burned, do not touch exhaust
system when system is hot. Oxygen sensor removal
should be performed when system is cool.
NOTE:
Be careful not to expose it to excessive shock.
1. Left (No.1) bank oxygen sensor (sensor 1)

6E2-38 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
HEATER INSPECTION
1) Disconnect HO2S-1 or -2 coupler.
2) Using ohmmeter, measure resistance between terminals
“VB” and “GND” of HO2S coupler (1).
If found faulty, replace HO2S.
Resistance of HO2S heater:
11.7 – 14.3 Ω
ΩΩ Ω (at 20 °C (68 °F)) for HO2S-2
5.0 – 6.4 Ω
ΩΩ Ω (at 20 °C (68 °F)) for HO2S-1
3) Connect HO2S coupler securely.
Heated oxygen sensor (sensor 2)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Disconnect coupler (3) of oxygen sensor(s).
3) Remove oxygen sensor(s) (2) from exhaust manifold(s) (1).
INSTALLATION
Reverse removal procedure noting the followings.
•Tighten oxygen sensor(s) to specified torque.
Tightening torque
Heated oxygen sensor 2 (a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
•Connect connector of oxygen sensor(s) and clamp wire har-
ness securely.
•After installing oxygen sensor(s), start engine and check that
no exhaust gas leakage exists. NOTE:
Temperature of HO2S affects resistance value largely.
Make sure that HO2S heater is at correct temperature.
WARNING:
To avoid danger of being burned, do not touch exhaust
system when system is hot. Oxygen sensor removal
should be performed when system is cool.
NOTE:
Be careful not to expose it to excessive shock.

6K-2 EXHAUST SYSTEM
On-Vehicle Service
Components
TYPE WITH WELD BOLT AT MUFFLER FRONT FLANGE
1-1 Exhaust manifold (without WU-TWC) 4. Heated oxygen sensor-1 (if equipped) 7. Exhaust pipe bolt 11. Muffler tail pipe
1-2 Exhaust manifold (with WU-TWC) 5. Exhaust pipe gasket 8. Muffler 12. Muffler gasket
2. Seal ring 6-1 Exhaust No.2 pipe (without WU-TWC) 8-1. Weld bolt 13. No.1 Exhaust pipe stiffener
3-1 Exhaust No.1 pipe (without WU-TWC) 6-2 Exhaust No.2 pipe (with WU-TWC) 9. Muffler mounting Tightening Torque
3-2 Exhaust No.1 pipe (with WU-TWC) 6-3 Exhaust No.2 pipe (without TWC) 10. Heated oxygen sensor-2
(if equipped)Do not reuse

EXHAUST SYSTEM 6K-3
TYPE WITHOUT WELD BOLT AT MUFFLER FRONT FLANGE
1-1 Exhaust manifold (without WU-TWC) 4. Heated oxygen sensor-1 (if equipped) 7. Exhaust pipe bolt 12. Muffler gasket
1-2 Exhaust manifold (with WU-TWC) 5. Exhaust pipe gasket 8. Muffler 13. No.1 Exhaust pipe stiffener
2. Seal ring 6-1 Exhaust No.2 pipe (without WU-TWC) 9. Muffler mounting Tightening Torque
3-1 Exhaust No.1 pipe (without WU-TWC) 6-2 Exhaust No.2 pipe (with WU-TWC) 10. Heated oxygen sensor-2
(if equipped)Do not reuse
3-2 Exhaust No.1 pipe (with WU-TWC) 6-3 Exhaust No.2 pipe (without TWC) 11. Muffler tail pipe