Page 24 of 30
24 INTRODUCTION AND MASTER TROUBLESHOOTING - WasterTroubleshooting Tightening Torque I
TIGHTENING TORQUE
Description
Thread for general purposes
(size x pitch) mm
6x1.0
8x 1.25
10x1.25
12x 1.25
14x 1.5
16x 1.5
18x 1.5
20x1.5
22x 1.5
24x 1.5
Description
Taper thread for pipes (size)
PT1/8
PT l/4
PT 3B
Taper thread for dry sealed pipes (size)
NF’TF l/16
NPTF l/8
NPTF l/4 Head mark f
Nm
3.0-3-s
7.9-12
16-23
29-43
46-70
67-l 00
100-150
150-190
ZOO-260
269-320 ft.lbs.
2.2-2.9 4.9-7.8
3.6-5.8
5.8-8.7 13-19 9.4-14
12-17 27-39 20-29
2’132 47-72 35-53
35-52 77-110 57-35
51-77 130-160 SO-120
74-110 180-230 130-170
110-140 160-320 1 go-240
150-190 340-430 250-320
1 go-240 420-550 310-410 Head mark [
Nm I
ft.lbs.
Nm ftlbs. Remarks
7.9-I 2 5.9-9.7 Internal thread: Aluminum
76-19 12-14 Internal thread: Cast iron
19-30 14-22 Internal thread: Aluminum
34-45 25-33 Internal thread: Cast iron
39-54 29-40 Internal thread: Aluminum
58-73 43-54 Internal thread: Cast iron
4.9-7.8 3.6-5.8 Internal thread: Aluminum
7.9-12 5.8-8.7 Internal thread: Cast iron
7.9-12 5.8-8.7 Internal thread: Aluminum
16-1s 12-14 Internal thread: Cast iron
19-13 14-22 Internal thread: Aluminum
34-45 25-33 Internal thread: Cast iron
MASTER TROUBLESHOOTING NceKAAO
ENGINE OVERHEATS
Symptom Probable cause -
Reference
page or remedy
Engine overheats Cooling system faulty
Incorrect ignition timing
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INTRODUCTION AND MASTER TROUBLESHOOTING - Master Troubleshooting 25
ENGINE WILL NOT CRANK OR CRANKS SLOWLY
Symptom
Engine will not crank or cranks
slowly Probable cause
Starting system faulty Reference
page or remedy
8-134.135
ENGINE WILL NOT START OR BE HARD TO START (CRANKS OK)
Symptom
Engine will not start or be hard to
start(Cranks OK)
ROUGH IDLE OR ENGINE STALL
Probable cause
No fuel supply to carburetor or injection system
Carburetor or injection system problems
Ignition system problems
Vacuum leaks
- Purge control valve hose
- Vacuum hoses
l intake manifold
- Air intake plenum
l Carburetor or throttle body
l EGRvalve
Compression too low Reference
page or remedy
14-34,90
14-34,90
3-147 to 149
Repair as
necessary
3-11.65
Symptom Probable cause Reference
page or remedy
Rough idle or
engine stalls Vacuum leaks
l Purge control valve hose
l Vacuum hoses
l Intake manifold
l Air intake plenum
l Carburetor or throttle body
l EGRvalve
1 Ignition system problems Repair as
necessary
8-147 to 149
Idle speed set too low 1 O-10.14-62
1~ ~ . Idle mrxture too lean or too rich 14-11
Carburetor or fuel injection system problems
Exhaust gas recirculation (EGR) system problems m-34.90
25-17.32
Engine overheats 7-4
Compression too low 9-11, 65
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26 INTRODUCTION AND MASTER TROUBLESHOOTlNG - Master Troubleshooting
ENGINE HESITATES OR POOR ACCELERATION
Symptom Probable cause
Engine hesitates or
poor acceleration
-I
Ignition system problem
Vacuum leaks
l Purge control valve hose
l Vacuum hoses
- intake manifold
l Air intake plenum
* Carburetor or throttle body
l EGRvalve
ENGINE DIESELING
Reference
page or remedy
8-147 to 149
Repair as
necessary
Air cleaner clogged
Fuel line clogged 113.10
1442.99
Carburetor or fuel injection system problem
Auxiliary acceleration pump faulty (cold engine)
Emission control system problem
l EGR system always on
- High-altitude compensation (HAC) system problem
Engine overheats 14-34.90
14-23
25-77.22.32
7-4
Compression too low g-II.65
I Symptom Probable cause I
Reference
page or remedy
I I I I -..
Engine dieseling (runs after
ignition switch is turned off) Carburetor problems
Incorrect ignition timing 14-34
8-14710 149
EXCESSIVE OIL CONSUMPTION
Symptom Probable cause Reference
page or remedy
Excessive oil consumption Oil leak
Positive crankcaseventilation line clogged
Valve stem seal worn or damaged
Valve stem worn
Piston ring worn or damaged Repair as
necessary
o-13
Replace
Replace
9-43
1 TSB Revision