Daewoo NUBIRA User Manual

1A – 10IGENERAL ENGINE INFORMATION
DAEWOO V–121 BL4
Valve Mechanism or Valve Train Noises
Step Action Value(s) Yes No
1 Is a light tapping sound heard from the engine? Go to Step 2 System OK
2 Inspect the valve springs.
Are the springs weak or broken?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
Go to Step 3
3 Inspect the valves.
Are the valves sticking or warped?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
Go to Step 4
4 Inspect the valve lifters.
Are the valve lifters dirty, stuck or worn?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
Go to Step 5
5 Inspect the camshaft lobes.
Are the camshaft lobes damaged or improperly ma-
chined?
Go toCamshaft
Replacement
Procedure
Go to Step 6
6 Check the oil supply to the valve train.
Is the oil supply insufficient or poor?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
Go to Step 7
7 Inspect the valve guides.
Are the valve guides worn?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
Go to Step 8
8 Inspect the valve spring seat.
Is the valve spring seat incorrect?
Go toCylinder
Head and
Valve Train
Components
Replacement
Procedure
System OK

Daewoo NUBIRA Specifications

General

Brand	Daewoo
Model	NUBIRA
Category	Automobile
Language	English