Mazda CX 7. Manual — part 127
EXHAUST SYSTEM [L3 WITH TC]
01-15–1
01-15
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
01-15
EXHAUST SYSTEM [L3 WITH TC]
EXHAUST SYSTEM INSPECTION
[L3 WITH TC] . . . . . . . . . . . . . . . . . . . . 01-15–1
EXHAUST SYSTEM
REMOVAL/INSTALLATION
[L3 WITH TC] . . . . . . . . . . . . . . . . . . . . 01-15–2
Seal Ring Removal Note . . . . . . . . . . . 01-15–3
HO2S Removal Note . . . . . . . . . . . . . . 01-15–3
Exhaust Manifold Insulator (Upper)
Removal Note . . . . . . . . . . . . . . . . . . . 01-15–3
WU-TWC Removal Note . . . . . . . . . . . . 01-15–3
Exhaust Manifold
Installation Note . . . . . . . . . . . . . . . . . 01-15–4
WU-TWC Installation Note . . . . . . . . . . 01-15–4
Seal Ring Installation Note . . . . . . . . . . 01-15–4
End of Toc
WM: EXHAUST SYSTEM
EXHAUST SYSTEM INSPECTION[L3 WITH TC]
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1. Start the engine and inspect each exhaust system component for exhaust gas leakage.
• If there is leakage, repair or replace if necessary.
End Of Sie
EXHAUST SYSTEM [L3 WITH TC]
01-15–2
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Revised 3/2007 (Ref. No. R051/07)
EXHAUST SYSTEM REMOVAL/INSTALLATION[L3 WITH TC]
id011539800200
Warning
• A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they
are cool before removing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct.
3. Remove the charge air cooler cover. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH
TC])
4. Remove the charge air cooler. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC])
5. Remove in the order indicated in the table.
6. Install in the reverse order of removal.
.
13
15
1
3
29—49
{3.0—4.9, 22—36}
29—49
{3.0—4.9, 22—36}
38—51
{3.9—5.2, 29—37}
43—64
{4.4—6.5, 32—47}
7.8—10.8 N·m
{80—110 kgf·cm,
70—95 in·lbf}
7.8—10.8 N·m
{80—110 kgf·cm,
70—95 in·lbf}
12
11
8
7
10
N·m {kgf·m, ft·lbf}
38—51
{3.9—5.2, 29—37}
38—51
{3.9—5.2, 29—37}
43—64
{4.4—6.5, 32—47}
A
A
4
14
TURBOCHARGER
7.8—10.8 N·m
{80—110 kgf·cm,
70—95 in·lbf}
6
9
SST
R
SST
R
R
R
R
5
SST
2
SST
R
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EXHAUST SYSTEM [L3 WITH TC]
01-15–3
01-15
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Seal Ring Removal Note
1. Remove the seal ring using a flathead screwdriver
being careful not to damage the pipe.
HO2S Removal Note
1. Remove the HO2S using the SST before
removing the exhaust manifold.
Exhaust Manifold Insulator (Upper) Removal Note
1. Remove the charge air cooler bracket.
2. Remove the exhaust manifold insulator (upper)
WU-TWC Removal Note
2WD
1. Remove the generator duct. (See 01-17-4 GENERATOR REMOVAL/INSTALLATION[L3 WITH TC])
2. Remove the WU-TWC.
4WD
1. Remove the cowl grille.
2. Remove the windshield wiper motor.
3. Remove the cowl panel. (See 09-10-13 COWL PANEL REMOVAL/INSTALLATION)
4. Remove the generator duct. (See 01-17-4 GENERATOR REMOVAL/INSTALLATION[L3 WITH TC])
5. Set the generator out of the way.
6. Remove the WU-TWC.
1
Main silencer
2
Seal ring (middle pipe side)
(See 01-15-3 Seal Ring Removal Note.)
(See 01-15-4 Seal Ring Installation Note.)
3
Middle pipe
4
Front pipe
5
Seal ring (WU-TWC side)
(See 01-15-3 Seal Ring Removal Note.)
(See 01-15-4 Seal Ring Installation Note.)
6
Clip
7
Rear HO2S
(See 01-15-3 HO2S Removal Note.)
8
Exhaust manifold insulator (Upper)
(See 01-15-3 Exhaust Manifold Insulator (Upper)
Removal Note.)
9
Front HO2S
(See01-15-3 HO2S Removal Note.)
10
Exhaust manifold insulator (Lower)
11
WU-TWC insulator
12
WU-TWC bracket
13
WU-TWC
(See 01-15-3 WU-TWC Removal Note.)
(See 01-15-4 WU-TWC Installation Note.)
14
Exhaust manifold
(See 01-15-4 Exhaust Manifold Installation Note.)
15
Exhaust manifold gasket
SEAL RING
FLATHEAD SCREWDRIVER
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49 L018 001
49 L018 001
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EXHAUST SYSTEM [L3 WITH TC]
01-15–4
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
Revised 3/2007 (Ref. No. R051/07)
Exhaust Manifold Installation Note
1. Tighten the exhaust manifold installation nuts in
the order shown.
Tightening torque
43— 64 N·m {4.4— 6.5 kgf·m, 32— 47 ft·lbf}
WU-TWC Installation Note
1. Temporarily tighten No.1 shown in the figure.
2. Temporarily tighten No.2 shown in the figure.
3. Temporarily tighten No.3 shown in the figure.
4. Completely tighten No.1 shown in the figure.
Tightening torque
38— 51 N·m {3.9— 5.2 kgf·m, 29— 37 ft·lbf}
5. Completely tighten No.2 shown in the figure.
Tightening torque
38— 51 N·m {3.9— 5.2 kgf·m, 29— 37 ft·lbf}
6. Completely tighten No.3 shown in the figure.
Tightening torque
38— 51 N·m {3.9— 5.2 kgf·m, 29— 37 ft·lbf}
Seal Ring Installation Note
Caution
• If installation is performed without using the SST, the seal ring will be damaged and deformed,
resulting in an incorrect installation. Always use the SST to install the seal ring.
1. Temporarily install the seal ring to the pipe so that
the seal ring is even with the flange.
5
4
10
6
9
8
7
3
1
2
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3
1
2
38—51 N·m {3.9—5.2 kgf·m, 29—37 ft·lbf}
38—51 N·m
{3.9—5.2 kgf·m, 29—37 ft·lbf}
R
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SEAL RING
FLANGE
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