Suzuki: Engine K6A-YH6. Manual — part 12
DIAGNOSTIC TROUBLESHOOTING
6-5
6
Excessive engine noise.
Valve train noise.
Check valve clearance. (See “Valve
Clearance Check and Adjustment” on
page 5-3.)
Crankshaft/connecting rod noise.
Check crankshaft, connecting rods, and
bearings. (See “Lower Crankcase,
Cylinder Block, and Crankshaft” on
page 7-42.)
Check pistons, piston rings, piston pins,
and small end of connecting rod. (See
“Connecting Rods and Pistons” on
page 7-38.)
Faulty timing chain or tension adjuster.
Check timing chain and tensioner. (See
Exhaust leak.
Check exhaust manifold. (See “Exhaust
White exhaust smoke.
Coolant leaking into cylinder.
Check cylinder head. (See “Cylinder
Check head gasket. (See “Cylinder Head”
Check cylinder liners. (See “Lower
Crankcase, Cylinder Block, and
Crankshaft” on page 7-42.)
Excessive engine vibration.
Loose or faulty crankshaft pulley.
Check crankshaft pulley. (See “Crankshaft
Loose or faulty flywheel/flex plate.
Check flywheel/flex plate.
Condition
Probable Cause
Remedy
REPAIR
7-3
7
7.1 Air Intake and Exhaust
Systems
Throttle Position Sensor
Removal and Installation
Figure 7-1
1.
Remove screws (1) and throttle position sensor (2).
2.
Inspect throttle position sensor. Replace as needed.
Pressure Sensor
Removal and Installation
Figure 7-2
1.
Remove screws (2), pressure sensor (1), and O-ring
(3).
2.
Inspect pressure sensor. Replace as needed.
Installation Notes
Always use new O-rings, gaskets, and seals.
Install pressure sensor by reversing the order of removal.
ISC (Idle Speed Control) Valve
Removal and Installation
Figure 7-3
1.
Remove screws (2), ISC valve (3), and O-ring (1).
2.
Inspect ISC valve. Replace as needed.
Installation Notes
Always use new O-rings, gaskets, and seals.
Install ISC valve by reversing the order of removal.
TN0713
1
2
TN0713
2
1
3
TN0691
2
3
1
7-4
REPAIR
7
PCV Valve
Removal and Installation
Figure 7-4
1.
Remove clamp (1) and hose (2).
2.
Remove PCV valve (4) from grommet (3).
3.
Inspect and test PCV valve. Replace as needed.
(See “PCV Valve/Hose Test” on page 5-2.)
Installation Note
Install PCV valve by reversing the order of removal.
Throttle Body
Removal and Installation
Figure 7-5
1.
Remove cap screws (2) and throttle body (1).
Figure 7-6
2.
Remove throttle body gasket (3).
Installation Notes
Always use new O-rings, gaskets, and seals.
Install new gasket and throttle body by reversing the
order of removal.
Intake Manifold
Removal
Figure 7-7
1.
Remove throttle body. (See “Throttle Body” on
page 7-4.)
2.
Remove fuel rail and injectors. (See “Injectors” on
page 7-9.)
3.
Remove knock sensor. (See “Knock Sensor” on
page 7-37.)
4.
Remove PCV hose. (See “PCV Valve” on page 7-4.)
5.
Remove cap screw (4).
6.
Remove nine cap screws (2) and three nuts (3).
7.
Remove intake manifold (1).
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2
4
3
TN0737
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2
TN0740
3
TN0736
4
1
3
3
2
2
2
REPAIR
7-5
7
Inspection
1.
Inspect intake manifold for cracks, damage, and
distortion.
Figure 7-8
2.
Using a straightedge and a feeler gauge, inspect the
mating face for distortion. Place the straightedge
across bolt hole centers at the locations indicated.
Measure any gaps with the feeler gauge. If the
measurement exceeds the limit, replace intake
manifold.
Intake Manifold Distortion Limit: 0.003 in. (0.07 mm)
Installation
Figure 7-9
NOTES
Clean intake manifold and cylinder head gasket surfaces
before installation.
Always use new O-rings, gaskets, and seals.
1.
Install new intake manifold gasket (1).
Figure 7-10
2.
Install intake manifold (2) and cap screw (5).
3.
Install nine cap screws (3) and three nuts (4). Tighten
to specification.
Intake Manifold Torque: 97 lb-in. (11 N•m)
4.
Install PCV hose. (See “PCV Valve” on page 7-4.)
5.
Install knock sensor. (See “Knock Sensor” on
page 7-37.)
6.
Install fuel rail and injectors. (See “Injectors” on
page 7-9.)
7.
Install throttle body. (See “Throttle Body” on
page 7-4.)
TN0735
TN0735
1
TN0736
5
2
4
4
3
3
3
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