104742-1360 ZEXEL 9 460 612 289 BOSCH INJECTION-PUMP ASSEMBLY 9460612289 1047421360 5897907740

Information Cross number Calibration Data Calibration Data Ex

Information injection-pump assembly

BOSCH 9 460 612 289 9460612289

ZEXEL 104742-1360 1047421360

ISUZU 5897907740 5897907740

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Buy INJECTION-PUMP ASSEMBLY 104742-1360 zexel genuine, new aftermarket engine parts with delivery

Components :

0.	INJECTION-PUMP ASSEMBLY	104742-1360
1.	_
2.	FUEL INJECTION PUMP	104642-1210
3.	NUMBER PLATE	146920-6100
4.	_
5.	CAPSULE	146620-0120
6.	ADJUSTING DEVICE
7.	NOZZLE AND HOLDER ASSY	105118-4683
8.	Nozzle and Holder	8-97119-858-0
9.	Open Pre:MPa(Kqf/cm2)	18.1{185}
10.	NOZZLE-HOLDER	105048-3352
11.	NOZZLE	105017-0610

Scheme ###:

1/6.	[1]	146601-0700	PACKING RING
6.	[1]	146100-0120	SUPPLY PUMP
9.	[1]	146103-0000	COVER
10.	[2]	139104-0000	FLAT-HEAD SCREW
12.	[1]	146200-0820	DRIVE SHAFT
12/1.	[1]	146200-0800	DRIVE SHAFT
12/2.	[1]	146201-0000	WOODRUFF KEY
12/3.	[2]	146202-0100	DAMPER
12/4.	[1]	146203-0000	TOOTHED GEAR
17.	[1]	146204-0000	PLAIN WASHER
20.	[1]	146210-1720	ROLLER SET
24.	[1]	146303-0000	BEARING PIN
25.	[1]	146304-0000	BEARING PIN
26.	[1]	146305-0000	CLAMPING BAND
27.	[1]	146205-0100	SLOTTED WASHER
29.	[1]	146220-0720	CAM PLATE
30.	[1]	146600-0800	O-RING
31.	[1]	146300-2600	PUMP PLUNGER
32.	[1]	146301-0000	SLIDING PIECE
33.	[1]	146603-0700	SHIM D17.5&7.5T0.60
34.	[1]	146302-7500	COMPRESSION SPRING
34B.	[1]	146302-7600	COMPRESSION SPRING
35/1.	[0]	146603-0700	SHIM D17.5&7.5T0.60
35/1.	[0]	146603-0800	SHIM D17.5&7.5T0.70
35/1.	[0]	146603-0900	SHIM D17.5&7.5T0.90
35/1.	[0]	146603-1000	SHIM D17.5&7.5T1.00
35/1.	[0]	146603-1100	SHIM D17.5&7.5T1.20
35/1.	[0]	146603-3600	SHIM D17.5&7.5T2.40
36.	[1]	146600-0800	O-RING
37.	[1]	146310-1300	COVER
38.	[2]	146620-6300	BLEEDER SCREW
39.	[1]	146310-5100	COVER
40.	[2]	146620-5000	BLEEDER SCREW
43.	[1]	146230-0000	SHIM
44.	[1]	146230-0100	PLAIN WASHER
45.	[1]	146231-0001	SLOTTED WASHER
47.	[2]	146233-0000	SLOTTED WASHER
48/1.	[1]	146603-0000	SHIM D17.0&5.2T0.50
48/1.	[1]	146603-0100	SHIM D17.0&5.2T0.80
48/1.	[1]	146603-0200	SHIM D17.0&5.2T1.00
48/1.	[1]	146603-0300	SHIM D17.0&5.2T1.20
48/1.	[1]	146603-0400	SHIM D17.0&5.2T1.50
48/1.	[1]	146603-0500	SHIM D17.0&5.2T1.80
48/1.	[1]	146603-0600	SHIM D17.0&5.2T2.00
48/1.	[1]	146690-1400	SHIM D17&5.2T0.9
48/1.	[1]	146690-1500	SHIM D17&5.2T1.1
48/1.	[1]	146690-1600	SHIM D17&5.2T1.3
48/1.	[1]	146690-1700	SHIM D17&5.2T1.4
48/1.	[1]	146690-1800	SHIM D17&5.2T1.6
48/1.	[1]	146690-1900	SHIM D17&5.2T1.7
48/1.	[1]	146690-5800	SHIM
48/1.	[1]	146690-5900	SHIM
48/1.	[1]	146690-6000	SHIM
48/1.	[1]	146690-6100	SHIM
48/1.	[1]	146690-6200	SHIM
48/1.	[1]	146690-6300	SHIM
48/1.	[1]	146690-6400	SHIM
48/1.	[1]	146690-6500	SHIM
48/1.	[1]	146690-6600	SHIM
48/1.	[1]	146690-6700	SHIM
48/1.	[1]	146690-6800	SHIM
48/1.	[1]	146690-6900	SHIM
48/1.	[1]	146690-7000	SHIM
48/1.	[1]	146690-7100	SHIM
48/1.	[1]	146690-7200	SHIM
48/1.	[1]	146690-7300	SHIM
48/1.	[1]	146690-7400	SHIM
48/1.	[1]	146690-7500	SHIM
48/1.	[1]	146690-7800	SHIM
49.	[2]	146234-0600	GUIDE PIN
50.	[1]	146402-1420	HYDRAULIC HEAD
50.	[1]	146402-1420	HYDRAULIC HEAD
50.	[1]	146402-1420	HYDRAULIC HEAD
51.	[1]	146600-0000	O-RING
52/1.	[1]	146420-0000	SHIM D9.5&3.0T1.90
52/1.	[1]	146420-0100	SHIM D9.5&3.0T1.92
52/1.	[1]	146420-0200	SHIM D9.5&3.0T1.94
52/1.	[1]	146420-0300	SHIM D9.5&3.0T1.96
52/1.	[1]	146420-0400	SHIM D9.5&3.0T1.98
52/1.	[1]	146420-0500	SHIM D9.5&3.0T2.00
52/1.	[1]	146420-0600	SHIM D9.5&3.0T2.02
52/1.	[1]	146420-0700	SHIM D9.5&3.0T2.04
52/1.	[1]	146420-0800	SHIM D9.5&3.0T2.06
52/1.	[1]	146420-0900	SHIM D9.5&3.0T2.08
52/1.	[1]	146420-1000	SHIM D9.5&3.0T2.10
52/1.	[1]	146420-1100	SHIM D9.5&3.0T2.12
52/1.	[1]	146420-1200	SHIM D9.5&3.0T2.14
52/1.	[1]	146420-1300	SHIM D9.5&3.0T2.16
52/1.	[1]	146420-1400	SHIM D9.5&3.0T2.18
52/1.	[1]	146420-1500	SHIM D9.5&3.0T2.20
52/1.	[1]	146420-1600	SHIM D9.5&3.0T2.22
52/1.	[1]	146420-1700	SHIM D9.5&3.0T2.24
52/1.	[1]	146420-1800	SHIM D9.5&3.0T2.26
52/1.	[1]	146420-1900	SHIM D9.5&3.0T2.28
52/1.	[1]	146420-2000	SHIM D9.5&3.0T2.30
52/1.	[1]	146420-2100	SHIM D9.5&3.0T2.32
52/1.	[1]	146420-2200	SHIM D9.5&3.0T2.34
52/1.	[1]	146420-2300	SHIM D9.5&3.0T2.36
52/1.	[1]	146420-2400	SHIM D9.5&3.0T2.38
52/1.	[1]	146420-2500	SHIM D9.5&3.0T2.40
52/1.	[1]	146420-2600	SHIM D9.5&3.0T2.42
52/1.	[1]	146420-2700	SHIM D9.5&3.0T2.44
52/1.	[1]	146420-2800	SHIM D9.5&3.0T2.46
52/1.	[1]	146420-2900	SHIM D9.5&3.0T2.48
52/1.	[1]	146420-3000	SHIM D9.5&3.0T2.50
52/1.	[1]	146420-3100	SHIM D9.5&3.0T2.52
52/1.	[1]	146420-3200	SHIM D9.5&3.0T2.54
52/1.	[1]	146420-3300	SHIM D9.5&3.0T2.56
52/1.	[1]	146420-3400	SHIM D9.5&3.0T2.58
52/1.	[1]	146420-3500	SHIM D9.5&3.0T2.60
52/1.	[1]	146420-3600	SHIM D9.5&3.0T2.62
52/1.	[1]	146420-3700	SHIM D9.5&3.0T2.64
52/1.	[1]	146420-3800	SHIM D9.5&3.0T2.66
52/1.	[1]	146420-3900	SHIM D9.5&3.0T2.68
52/1.	[1]	146420-4000	SHIM D9.5&3.0T2.70
52/1.	[1]	146420-4100	SHIM D9.5&3.0T2.72
52/1.	[1]	146420-4200	SHIM D9.5&3.0T2.74
52/1.	[1]	146420-4300	SHIM D9.5&3.0T2.76
52/1.	[1]	146420-4400	SHIM D9.5&3.0T2.78
52/1.	[1]	146420-4500	SHIM D9.5&3.0T2.80
52/1.	[1]	146420-4600	SHIM D9.5&3.0T2.82
52/1.	[1]	146420-4700	SHIM D9.5&3.0T2.84
52/1.	[1]	146420-4800	SHIM D9.5&3.0T2.86
52/1.	[1]	146420-4900	SHIM D9.5&3.0T2.88
52/1.	[1]	146420-5000	SHIM D9.5&3.0T2.90
52/1.	[1]	146420-5100	SHIM D9.5&3.0T1.74
52/1.	[1]	146420-5200	SHIM D9.5&3.0T1.76
52/1.	[1]	146420-5300	SHIM D9.5&3.0T1.78
52/1.	[1]	146420-5400	SHIM D9.5&3.0T1.80
52/1.	[1]	146420-5500	SHIM D9.5&3.0T1.82
52/1.	[1]	146420-5600	SHIM D9.5&3.0T1.84
52/1.	[1]	146420-5700	SHIM D9.5&3.0T1.86
52/1.	[1]	146420-5800	SHIM D9.5&3.0T1.88
54.	[4]	146433-0100	GASKET D12&6.4T1.00
55.	[4]	146430-1420	DELIVERY-VALVE ASSEMBLY
56.	[4]	146432-0200	COMPRESSION SPRING
57.	[4]	146602-2300	FILLER PIECE
58.	[4]	146440-0600	FITTING
60.	[4]	139106-0100	FLAT-HEAD SCREW
67.	[1]	146500-7321	GOVERNOR COVER
67/1.	[1]	146508-6621	GOVERNOR COVER
67/2.	[1]	146515-0220	CONTROL SHAFT
67/3.	[1]	146600-0100	O-RING
67/4.	[1]	139310-0200	PLAIN WASHER
67/5.	[1]	146535-3100	CONTROL LEVER
67/5B.	[1]	146535-3200	CONTROL LEVER
67/6.	[1]	014110-6440	LOCKING WASHER
67/7.	[1]	013020-6040	UNION NUT M6P1H5
67/13.	[1]	013020-6040	UNION NUT M6P1H5
67/14.	[1]	146621-1700	UNION NUT
67/15.	[1]	146526-4500	BLEEDER SCREW
67/16.	[1]	146526-6400	BLEEDER SCREW
67/18.	[1]	146587-9200	COILED SPRING
67/19.	[1]	146541-7100	PLATE
67/26.	[1]	146628-5820	BRACKET
67/78.	[1]	146600-4400	SEAL RING
67/200.	[1]	139308-0300	PLAIN WASHER
67/201.	[1]	146545-3400	THREADED PIN L53.00
67/201B.	[1]	146545-3500	THREADED PIN L55.00
67/201C.	[1]	146545-3600	THREADED PIN L57.00
67/202.	[1]	139208-0900	UNION NUT
67/203.	[1]	146600-1200	O-RING
95.	[1]	146565-3820	FULCRUM LEVER
104.	[2]	146568-0000	SLOTTED SPRING PIN
105.	[2]	026508-1140	GASKET D11.4&8.2T1
106.	[2]	146588-0500	COILED SPRING
107.	[1]	146569-0300	UNION NUT
108.	[1]	146570-0100	GOVERNOR SHAFT
109.	[1]	146600-0400	O-RING
110/1.	[1]	146571-0000	SHIM D20.2&8.3T1.05
110/1.	[1]	146571-0100	SHIM D20.2&8.3T1.25
110/1.	[1]	146571-0200	SHIM D20.2&8.3T1.45
110/1.	[1]	146571-0300	SHIM D20.2&8.3T1.65
110/1.	[1]	146571-0400	SHIM D20.2&8.3T1.85
110/1.	[1]	146571-0500	SHIM D20.2&8.3T1.15
110/1.	[1]	146571-0600	SHIM D20.2&8.3T1.35
110/1.	[1]	146571-0700	SHIM D20.2&8.3T1.55
110/1.	[1]	146571-0800	SHIM D20.2&8.3T1.75
111.	[1]	146602-0600	PLAIN WASHER D20&8.4T1.40
112.	[1]	146572-0020	FLYWEIGHT ASSEMBLY
114.	[1]	146602-0500	PLAIN WASHER D17&6.4T1.60
115.	[1]	146975-4200	SLIDING SLEEVE
116.	[1]	146576-0200	CAP
117/1.	[1]	146577-1800	PLUG L2.10
117/1.	[1]	146577-1900	PLUG L2.30
117/1.	[1]	146577-2000	PLUG L2.50
117/1.	[1]	146577-2100	PLUG L2.70
117/1.	[1]	146577-2200	PLUG L2.90
117/1.	[1]	146577-2300	PLUG L3.10
117/1.	[1]	146577-2400	PLUG L3.30
117/1.	[1]	146577-2500	PLUG L3.50
117/1.	[1]	146577-2600	PLUG L3.70
117/1.	[1]	146577-2700	PLUG L3.90
117/1.	[1]	146577-2800	PLUG L4.10
117/1.	[1]	146577-2900	PLUG L4.30
117/1.	[1]	146577-3000	PLUG L4.50
117/1.	[1]	146577-3100	PLUG L4.70
117/1.	[1]	146577-3200	PLUG L4.90
117/1.	[1]	146577-3300	PLUG L5.10
117/1.	[1]	146577-6700	PLUG L2.2
117/1.	[1]	146577-6800	PLUG L2.4
117/1.	[1]	146577-6900	PLUG L2.6
117/1.	[1]	146577-7000	PLUG L2.8
117/1.	[1]	146577-7100	PLUG L3.0
117/1.	[1]	146577-7200	PLUG L3.2
117/1.	[1]	146577-7300	PLUG L3.4
117/1.	[1]	146577-7400	PLUG L3.6
117/1.	[1]	146577-7500	PLUG L3.8
117/1.	[1]	146577-7600	PLUG L4.0
117/1.	[1]	146577-7700	PLUG L4.2
117/1.	[1]	146577-7800	PLUG L4.4
117/1.	[1]	146577-7900	PLUG L4.6
117/1.	[1]	146577-8000	PLUG L4.8
117/1.	[1]	146577-8100	PLUG L5.0
117/1.	[1]	146877-0000	PLUG L5.2
117/1.	[1]	146877-0100	PLUG L5.3
117/1.	[1]	146877-0200	PLUG L5.4
117/1.	[1]	146877-0300	PLUG L5.5
117/1.	[1]	146877-4700	PLUG
117/1.	[1]	146877-4800	PLUG
117/1.	[1]	146877-4900	PLUG
117/1.	[1]	146877-5000	PLUG
120.	[1]	146579-8020	RETAINING PIN
122.	[1]	146580-0800	GOVERNOR SPRING
123.	[4]	139106-0200	FLAT-HEAD SCREW
130.	[1]	146421-1020	CAPSULE
130/2.	[1]	139508-0200	GASKET D11.4&8.2T1
130/3.	[1]	146422-0300	BLEEDER SCREW
130/4.	[1]	146600-0500	O-RING
133.	[1]	146600-0600	O-RING
134.	[1]	146600-0700	O-RING
135.	[1]	146110-0620	CONTROL VALVE
135/5.	[1]	146114-0000	SPRING WASHER
136.	[1]	146650-8620	PULLING ELECTROMAGNET
137.	[2]	139514-0200	GASKET
145.	[1]	146621-1000	UNION NUT
205.	[1]	025804-1610	WOODRUFF KEY
206.	[1]	013121-4140	UNION NUT M14P1.5H11
207.	[1]	029321-4050	LOCKING WASHER
233.	[1]	146658-8920	WIRE
240.	[1]	146650-0820	PULLING ELECTROMAGNET
240/8.	[1]	146600-1700	O-RING
242.	[1]	146658-9720	WIRE
243.	[1]	146621-1000	UNION NUT
244.	[1]	146613-5620	PLATE
245.	[3]	139512-0500	GASKET
246.	[1]	146125-0000	EYE BOLT
247.	[1]	146608-6120	INLET UNION
247.	[1]	146608-6120	INLET UNION
260.	[1]	146611-1120	BRACKET
261.	[2]	146621-4700	UNION NUT
264.	[1]	016500-5010	O-RING
270.	[1]	146615-1520	TOOTHED GEAR
270/1.	[1]	146615-1400	TOOTHED GEAR
270/2.	[1]	146615-1500	COUPLING PLATE
270/3.	[6]	020006-1870	BLEEDER SCREW M6P1L18 7T
275.	[1]	146612-4920	BRACKET
276.	[2]	010010-2040	BLEEDER SCREW M10P1.5L20
800S.	[1]	146019-9120	PUMP HOUSING
800S/1/6.	[1]	146601-0700	PACKING RING
804S.	[1]	146232-0720	COMPRESSION SPRING
805S.	[1]	146574-0120	PARTS SET
810S.	[1]	146600-1120	REPAIR SET
813S.	[1]	146600-3120	PARTS SET
821S.	[1]	146210-5720	ROLLER SET
835S.	[1]	146598-1000	CAP
836S/1.	[1]	146598-0600	CAP L18
836S/1.	[1]	146598-0700	CAP L21
836S/1.	[1]	146598-0800	CAP L24
836S/1.	[1]	146598-0900	CAP L27
903.	[1]	146620-0120	CAPSULE
903/2.	[1]	146600-1300	O-RING &13W1.9
906.	[1]	146920-6100	NAMEPLATE

Include in #2:

104742-1360 as INJECTION-PUMP ASSEMBLY

Cross reference number

BOSCH 9 460 612 289 9460612289

ZEXEL 104742-1360 1047421360

ISUZU 5897907740 5897907740

Zexel num

Bosch num

Firm num

Name

104742-1360

9 460 612 289

5897907740 ISUZU

INJECTION-PUMP ASSEMBLY
4BE1 * K

Calibration Data:

Adjustment conditions

Test oil
1404 Test oil ISO4113orSAEJ967d

Test oil temperature degC 45 45 50

Nozzle 105000-2010

Bosch type code NP-DN12SD12TT

Nozzle holder 105780-2080

Opening pressure MPa 14.7 14.7 15.19

Opening pressure kgf/cm2 150 150 155

Injection pipe
Inside diameter - outside diameter - length (mm) mm 2-6-840

Transfer pump pressure kPa 20 20 20

Transfer pump pressure kgf/cm2 0.2 0.2 0.2

Direction of rotation (viewed from drive side)
Right R

Injection timing adjustment

Pump speed r/min 1050 1050 1050

Average injection quantity mm3/st. 57.5 57 58

Difference in delivery mm3/st. 4

Basic *

Oil temperature degC 50 48 52

Injection timing adjustment_02

Pump speed r/min 400 400 400

Average injection quantity mm3/st. 57.5 57.5 57.5

Oil temperature degC 47 45 49

Injection timing adjustment_03

Pump speed r/min 700 700 700

Average injection quantity mm3/st. 46.1 46.1 46.1

Oil temperature degC 47 45 49

Injection timing adjustment_04

Pump speed r/min 1050 1050 1050

Average injection quantity mm3/st. 57.5 56.5 58.5

Difference in delivery mm3/st. 4

Basic *

Oil temperature degC 50 48 52

Injection timing adjustment_05

Pump speed r/min 1400 1400 1400

Average injection quantity mm3/st. 55.8 55.8 55.8

Oil temperature degC 51 49 53

Injection timing adjustment_06

Pump speed r/min 1750 1750 1750

Average injection quantity mm3/st. 54.7 54.7 54.7

Difference in delivery mm3/st. 6

Oil temperature degC 52 50 54

Injection quantity adjustment

Pump speed r/min 2100 2100 2100

Average injection quantity mm3/st. 13.4 10.4 16.4

Difference in delivery mm3/st. 7

Basic *

Oil temperature degC 54 52 56

Injection quantity adjustment_02

Pump speed r/min 2200 2200 2200

Average injection quantity mm3/st. 8

Oil temperature degC 55 53 57

Injection quantity adjustment_03

Pump speed r/min 2100 2100 2100

Average injection quantity mm3/st. 13.4 10.4 16.4

Difference in delivery mm3/st. 7

Oil temperature degC 54 52 56

Governor adjustment

Pump speed r/min 350 350 350

Average injection quantity mm3/st. 9.4 7.4 11.4

Difference in delivery mm3/st. 2

Basic *

Oil temperature degC 47 45 49

Governor adjustment_02

Pump speed r/min 350 350 350

Average injection quantity mm3/st. 9.4 7.4 11.4

Difference in delivery mm3/st. 2

Oil temperature degC 47 45 49

Timer adjustment

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 80 80 120

Basic *

Oil temperature degC 47 45 49

Remarks
Full

Timer adjustment_02

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 80 80

Oil temperature degC 47 45 49

Speed control lever angle

Pump speed r/min 350 350 350

Average injection quantity mm3/st. 0 0 0

Oil temperature degC 47 45 49

Remarks
Magnet OFF at idling position

Speed control lever angle_02

Pump speed r/min 100 100 100

Average injection quantity mm3/st. 0 0 0

Oil temperature degC 47 45 49

Remarks
Magnet OFF at idling position

0000000901

Pump speed r/min 1600 1600 1600

Overflow quantity cm3/min 620 490 750

Oil temperature degC 51.5 49.5 53.5

Stop lever angle

Pump speed r/min 1600 1600 1600

Pressure with S/T OFF kPa 588 568 608

Pressure with S/T OFF kgf/cm2 6 5.8 6.2

Basic *

Oil temperature degC 51.5 49.5 53.5

Stop lever angle_02

Pump speed r/min 1600 1600 1600

Pressure with S/T OFF kPa 588 568 608

Pressure with S/T OFF kgf/cm2 6 5.8 6.2

Basic *

Oil temperature degC 51.5 49.5 53.5

Stop lever angle_03

Pump speed r/min 1750 1750 1750

Pressure with S/T OFF kPa 637 608 666

Pressure with S/T OFF kgf/cm2 6.5 6.2 6.8

Oil temperature degC 51.5 49.5 53.5

0000001101

Pump speed r/min 1600 1600 1600

Timer stroke with S/T OFF mm 3 2.8 3.2

Basic *

Oil temperature degC 51.5 49.5 53.5

_02

Pump speed r/min 850 850 850

Timer stroke with S/T ON mm 0.5 0.5

Oil temperature degC 48 46 50

_03

Pump speed r/min 1450 1450 1450

Timer stroke with S/T OFF mm 0.5

Oil temperature degC 51 49 53

_04

Pump speed r/min 1500 1500 1500

Timer stroke with S/T OFF mm 0.9 0.5 1.2

Oil temperature degC 51 49 53

_05

Pump speed r/min 1600 1600 1600

Timer stroke with S/T OFF mm 3 2.8 3.2

Basic *

Oil temperature degC 51.5 49.5 53.5

_06

Pump speed r/min 1750 1750 1750

Timer stroke with S/T OFF mm 5.7 5.4 6.1

Oil temperature degC 52 50 54

0000001201

Max. applied voltage V 16 16 16

Test voltage V 25 24 26

Timing setting

K dimension mm 3.1 3 3.2

KF dimension mm 5.5 5.4 5.6

MS dimension mm 0.9 0.8 1

Pre-stroke mm 0.45 0.43 0.47

Control lever angle alpha deg. 50 46 54

Control lever angle beta deg. 35 30 40

Test data Ex:

0000001801 TEMP. ADJUST FULL-LOAD SCREW

Temporary full load screw adjustment Set the full load screw protrusion at L mm at assembly.
----------
L=14.0+-0.5mm
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L=14.0+-0.5mm

Information:

Cylinder Head And Valve Components
Check cylinder head for cracks before reconditioning.Flatness of the cylinder head should be within .006 in. (0.15 mm) total, and a maximum of .003 in. (0.08 mm) for any 6 in. (152.4 mm) span. A maximum stock removal of .010 in. (0.25 mm) is permissible when resurfacing the head.Always check the thickness of a cylinder head before resurfacing. The cylinder head may have been resurfaced before and would not have enough stock to be resurfaced again.To check the thickness of a cylinder head, measure through the fuel injection nozzle holes at each end of the cylinder head. For the correct thickness of the cylinder head, see the topic CYLINDER HEAD in the SPECIFICATIONS.The exhaust valve seats have replaceable inserts. To remove, use the 8S7170 Valve Seat Insert Puller Group.
REMOVING EXHAUST VALVE SEAT INSERTFreeze the exhaust valve seat inserts or use the 8S7170 Valve Seat Insert Puller Group to install inserts into head. Be sure bores are clean, free of burrs, and the insert has a good press fit into the bore.After inserts are installed, grind the seat face of the insert to be sure it is flat, has the correct angle, and is in alignment with the bore in the valve guide. For specifications, see VALVE GRINDING SPECIFICATIONS CHART. Replace exhaust valve seat inserts when valve seat width or valve head-to-cylinder head face can not be machined to the correct specification. For specifications, see VALVE GRINDING SPECIFICATIONS CHART.A 2N8943 Valve Seat Insert for the intake valve is available. This insert can be used in the repair of cylinder heads which have an intake valve seat with damage. Before, damage to an intake valve seat made replacement of the cylinder head assembly necessary.To use a 2N8943 Valve Seat Insert, the inlet port of the cylinder head must be machined to a diameter of 2.1470 .0005 in. (54.534 0.013 mm) and to a depth of .442 .002 in. (11.23 0.05 mm).To install a 2N8943 Valve Seat Insert into the cylinder head, freeze the insert or use a 2P2343 Extractor with the 8S7170 Valve Seat Insert Puller Group. After an insert is installed, grind the seat face of the insert to be sure it is flat, has the correct angle, and is in alignment with the bore in the valve guide. For specifications, see VALVE GRINDING SPECIFICATIONS CHART.Clean valve guides of all carbon and oil, using the 5P5176 Brush and a solvent.The valve guides are cast in the cylinder heads. Check each valve guide bore size 3/4 in. (19.1 mm) deep from each end. The bore size is .3745 .0005 in. (9.512 0.013 mm) and the maximum size worn is .3760 in. (9.550 mm). Valve guides worn more than the maximum wear size, can be restored to original tolerances through knurling.Use the 5P3536 Valve Guide Gauge Group to check the bore of the valve guides. Special Instructions GMG02562 gives complete and detailed instructions for use of the 5P3536 Valve Guide Gauge