Daewoo NUBIRA User Manual

GENERAL ENGINE INFORMATION 1A – 5
DAEWOO V–121 BL4
Heavy Knock Hot with Torque Applied
Step Action Value(s) Yes No
1 Is there a heavy knock when the engine is hot and
torque is applied?
Go to Step 2 System OK
2 Inspect the balancer and the pulley hub.
Is the balancer or the pulley hub broken?
Go to Step 3 Go to Step 4
3 Replace the broken balancer or the pulley hub.
Is the repair complete?
Go to Step 1
4 Inspect the torque converter bolts.
Are the bolts tightened to specified value?
45NSm(33 lb–
ft)
Go to Step 5 Go to Step 6
5 Tighten the torque converter bolts.
Is the repair complete?
Go to Step 1
6 Inspect the accessory belts.
Are the belts too tight or nicked?
Go to Step 7 Step 8
7 Replace and/or tension the belts to specifications as
necessary.
Is the repair complete?
Go to Step 1
8 Inspect the exhaust system.
Is the system grounded?
Go to Step 9 Go to Step 10
9 Reposition the system as necessary.
Is the repair complete?
Go to Step 1
10 Inspect the flywheel.
Is the flywheel cracked?
Go to Step 11 Go to Step 12
11 Replace the flywheel.
Is the repair complete?
Go to Step 1
12 Inspect the main bearing clearance.
Is the clearance more than the specified value?
2.0 DOHC
0.015–0.040
mm
(0.00059–0.001
5 in.)
Go to Step 13 Go to Step 14
13 Replace the main bearings as necessary.
Is the repair complete?
Go to Step 1
14 Inspect the rod bearing clearance.
Is the clearance more than the specified value?
0.019–0.070
mm
(0.0007–0.0027
in.)
Go to Step 15 System OK
15 Replace the rod bearings as necessary.
Is the repair complete?
Go toStep 1

Daewoo NUBIRA Specifications

General

Brand	Daewoo
Model	NUBIRA
Category	Automobile
Language	English