1A – 2IGENERAL ENGINE INFORMATION
DAEWOO V–121 BL4
OIL PRESSURE TEST
Step Action Value(s) Yes No
1 Is the oil pressure warning lamp on? Go to Step 2 System OK
2 Check the oil level in the crankcase.
Is the oil level low?
Go to Step 3 Go to Step 4
3 Add oil so that the oil level is up to the MAX mark on
the indicator.
Is the repair complete?
Go to Step 1
4 Check the idle speed.
Is the idle speed below the value specified?
825 rpm Go to Step 5 Go to Step 6
5 Increase the idle speed.
Is the speed increased?
Go to Step 1
6 Inspect the oil pressure switch.
Is the oil pressure switch incorrect or malfunction-
ing?
Go to Step 7 Go to Step 8
7 Install a new oil pressure switch.
Is the repair complete?
Go to Step 1
8 Inspect the oil pressure gauge.
Is the oil pressure gauge incorrect or malfunction-
ing?
Go to Step 9 Go to Step 10
9 Install a new oil pressure gauge.
Is the repair complete?
Go to Step 1
10 Inspect the engine oil.
Is the engine oil in the crankcase diluted or of the im-
proper viscosity?
Go to Step 11 Go to Step 12
11 Install new engine oil of the proper viscosity for the
expected temperatures.
Is the repair complete?
Go to Step 1
12 Inspect the oil pump.
Is the pump worn or dirty?
Go to Step 13 Go to Step 14
13 Replace the oil pump.
Is the repair complete?
Go to Step 1
14 Inspect the oil filter.
Is the oil filter plugged?
Go to Step 15 Go to Step 16
15 Install a new oil filter.
Is the repair complete?
Go to Step 1
16 Inspect the oil pickup screen.
Is the oil pickup screen loose or plugged?
Go to Step 17 Go to Step 18
17 Tighten or replace the oil pickup screen as neces-
sary.
Is the repair complete?
Go to Step 1
18 Inspect the oil pickup tube.
Are there any holes in the oil pickup tube?
Go to Step 19 Go to Step 20
19 Replace the oil pickup tube.
Is the repair complete?
Go to Step 1
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