Detroit Series 60 & Series 50 Camshaft Timing Specifications
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No.: 04 TS-43Rev3
January 28, 2008
TO: Service Locations
FROM: Technical Support Development
SUBJECT: Series 60
®
and Series 50
®
Camshaft Timing Specifications
ISSUE
Camshaft timing, valve lash, injector height, and Jake Brake® lash are all very important
specifications that must be followed closely in order to optimize the performance and service life
of any Detroit Diesel engine. We have assembled four charts that bring together essential and
current information for servicing the Series 60 and Series 50 diesel and gas engines. Most of
the models listed in the attached charts are on-highway applications, but there are a few listed
for off-highway. The attached camshaft timing charts should prove very helpful when servicing
these engines.
Note: If the valve cover option label is missing, illegible or incorrect you will need to check to
see what camshaft is in the engine. To determine the camshaft that is used in the engine check
the part number stamped on the rear face of the camshaft or use DDCSN to enter the engine
serial number. DDCSN will retrieve the model number which will provide the correct injector and
valve adjustments.
CONTACT INFORMATION
Please contact the Detroit Diesel Customer Support Center at 313-592-5800 or email
csc@detroitdiesel.com if you have any questions.
Detroit Diesel 13400 Outer Drive, West / Detroit, Michigan 48239-4001
WU 11.1 88-89 II 8929484 / 485 78.2 (3.079) 0.203 (0.008) 0.508 (0.020) 760A 0.660 (0.026) 4.39-5.46 (0.173 -0.215)
WU 11.1 90-93 II 8929484 / 485 78.2 (3.079) 0.203 (0.008) 0.660 (0.026) 760A 0.660 (0.026) 4.39-5.46 (0.173 -0.215)
GU 12.7 88-89 II 89229472 / 473 78.2 (3.079) 0.203 (0.008) 0.508 (0.020) 760A 0.660 (0.026) 4.39-5.46 (0.173 -0.215)
GU * 12.7 90-93 II 23505194 / 195 78.2 (3.079) 0.203 (0.008) 0.660 (0.026) 765 0.660 (0.026) 4.39-5.46 (0.173 -0.215)
MK,BK 12.7 2000-02 IV 23528308 / 309 82.1 (3.230) 0.203 (0.008) 0.660 (0.026) 795 0.813 (0.032) 6.527-7.594 (0.257 -0.299)
MK 12.7 2002 IV 23528605 / 606 82.1 (3.230) 0.203 (0.008) 0.660 (0.026) 797 0.508 (0.020) 5.893-6.960 (0.232 -0.274)
MK_E 12.7 2002-03 IV 23531130 82.1 (3.230) 0.203 (0.008) 0.508 (0.020) 797 0.508 (0.020) 6.452-7.214 (0.254 -0.284)
MV_E 12.7 2004-06 V 23533694
***See Service
Manual
0.203 (0.008) 0.508 (0.020) 797 0.508 (0.020) 6.655-7.214 (0.262 -0.284)
Marine-TK 12.7 Vary IV 23525525 / 526 81.0 (3.189) 0.203 (0.008) 0.660 (0.026) N/A N/A 6.17-6.78 (0.243 -0.267)
HK 14.0 2000-02 IV 23528308 / 309 82.1 (3.230) 0.203 (0.008) 0.660 (0.026) 795 0.813 (0.032) 6.527-7.594 (0.257 -0.299)
HK_E 14.0 2002-03 IV 23531130 82.1 (3.230) 0.203 (0.008) 0.508 (0.020) 797 0.508 (0.020) 6.452-7.214 (0.254 -0.284)
HV_E 14.0 2004-06 V 23533694
***See Service
Manual
0.203 (0.008) 0.508 (0.020) 797 0.508 (0.020) 6.655-7.214 (0.262 -0.284)
HK62 14.0 2000 IV 23524911 / 912 81.0 (3.189) 0.203 (0.008) 0.660 (0.026) 790C 0.660 (0.026) 5.03-6.10 (0.198 -0.240)
HK62 14.0 2000-03 IV 23528308 / 309 82.1 (3.230) 0.203 (0.008) 0.660 (0.026) 795 0.813 (0.032) 6.527-7.594 (0.257 -0.299)
HK62 14.0 2004-06 IV 23528308 / 309 82.1 (3.230) 0.203 (0.008) 0.508 (0.020) 797A 0.508 (0.020) 6.527-7.594 (0.257 -0.299)
Marine-HK 14.0 Vary IV 23529007 / 008 81.0 (3.189) 0.203 (0.008) 0.660 (0.026) N/A N/A 6.12-7.19 (0.241 -0.283)
HG _E 14.0 2007 VI 23535545 / 153J
****See Service
Manual
0.230 (0.008) 0.508 (0.020) 797B 0.508 (0.020) 6.17-6.73 (0.243-0.265)
*GU40 is equipped with a Model 760A Jake Brake. Use 760A lash specs when servicing
**MK and BK models with 0712 Valve Mech are equipped with a Model 770 Jake Brake. Use 770 lash specifications when servicing.
DDEC Year Engine Model
Exhaust Valve Lash
mm (inches)
Intake Valve Lash
mm (inches)
Injector Height
mm (inches)
Camshaft/Assembly Part
Number
Cam Timing Range
mm (inches)
Jake Brake Lash
mm (inches)
Jake Brake
Model
23524291 / 292
23524911 / 912
81.0 (3.189) 0.203 (0.008) 0.660 (0.026)
81.0 (3.189)
23524291 / 292
23524911 / 912
0.203 (0.008) 0.660 (0.026)
80.3 (3.161) 0.203 (0.008)
Daewoo
TK6K
12.7
SERIES 60 DIESEL VALVE LASH, JAKE BRAKE LASH AND CAM TIMING SPECS
2000-04 IV 0.660 (0.026) 797A 0.508 (0.020) 5.11-6.17 (0.201 -0.243)
23523982 / 983
23524917 / 918
23524291 / 292
23524911 / 912
WK 11.1 94-97
MK,BK **
GK 12.7 94-97
GK 12.7 1998
PK,TK
SK 11.1 94-97 III 0.660 (0.026)
23524291 / 292
23524911 / 912
23518717 / 718
23524899 / 900
23513565 / 564
23524905 / 906
0.660 (0.026)
0.660 (0.026)
0.660 (0.026)
23524654 / 655
23524913 / 914
81.0 (3.189) 0.203 (0.008)
760A 0.660 (0.026) 4.95-6.53 (0.195 -0.257)
23513563 / 562 23524897
/ 898
0.660 (0.026) 760A 0.660 (0.026) 4.95-6.53 (0.195 -0.257)
78.8 (3.102) 0.203 (0.008)
III 78.8 (3.102) 0.203 (0.008)
III 78.8 (3.102) 0.203 (0.008)
81.0 (3.189) 0.203 (0.008)
4.95-6.53 (0.195 -0.257)
23521680 / 681
23524907 / 908
80.3 (3.161) 0.203 (0.008) 0.660 (0.026) 765 0.660 (0.026) 5.36-6.76 (0.211 -0.266)
5.36-6.76 (0.211 -0.266) 12.7 1998 IV
23521680 / 681
23524907 / 908
EK 11.1 1998 IV 760B 0.584 (0.023)
III
5.46-6.71 (0.215 -0.264)
23522199 / 200
23524903 / 904
0.203 (0.008) 0.660 (0.026) 760B 0.584 (0.023) 5.21-6.27 (0.205 -0.247) LK 11.1 1999 IV
MK,BK 12.7 1999 IV 0.660 (0.026)
81.0 (3.189)
770 0.584 (0.023)
0.584 (0.023)
765 0.660 (0.026)
80.3 (3.161) 0.203 (0.008) 765A
5.03-6.10 (0.198 -0.240)
12.7 2000 IV 81.0 (3.189) 0.203 (0.008) 0.660 (0.026) 790 0.660 (0.026) 5.03-6.10 (0.198 -0.240)
HK 14.0 1999 IV
HK 14.0 2000 IV
0.584 (0.023) 5.03-6.10 (0.198 -0.240)
790A 0.660 (0.026) 5.03-6.10 (0.198 -0.240)
770
The following is from the Series 60 Service Manual (6SE483).
*** Adjust the valves and N3 fuel injector settings as follows:
1. Disconnect starting power for engine.
2. Remove the engine valve rocker cover as outlined. Refer to "Removal and
Cleaning of One-piece Rocker Cover for Diesel Engines Only" for one-piece,
refer to "Removal and Cleaning of Two-piece Rocker Cover for Diesel Engines
Only" for two-piece rocker cover, and refer to "Removal and Cleaning of Three-
piece Rocker Cover" for three-piece rocker cover.
3. Insert a 3/4 in. drive breaker bar or ratchet into the square hole in the center of
the crankshaft pulley.
4. Bar the engine in the direction of rotation and observe a cylinder where the
injector rocker arm is just beginning to depress the injector plunger, both the
intake and exhaust valves should be closed.
a. Stop turning the engine and mount a magnetic base dial indicator so you
can monitor the upward lift of travel of that injector lobe.
b. Set the pedestal of the dial indicator on the top of the injector cam roller.
Adjust the pedestal so it can travel the entire upward movement of
the lobe.
c. Continue to slowly bar the engine over in the direction of rotation until the
dial indicator shows no more upward lift. The needle of the dial indicator
will stop moving indicating maximum lift.
d. This is the point of maximum injector roller lift, the injector can now
be set.
e. If you rotate the engine beyond this point you will have to bar the engine
over in the opposite direction at least 1/4 turn and then bar the engine
over in the direction of rotation until maximum injector roller lift
is obtained.
5. Stop engine rotation and note which cylinder this is, and follow the sequence
listed in Table 1 to correctly set injector and valves.
Max. injector lobe travel on
Cylinder No.
Adjust Injector on
Cylinder No.
Adjust Valves on
Cylinder No.
6 6 2
2 2 4
4 4 1
1 1 5
5 5 3
3 3 6
Table 1. Valve Lash and N3 Injector Setting Adjustment Sequence
6. This injector can now be set using this procedure:
a. Loosen the locknut on the adjusting screw at least two full turns.
b. Tighten the adjusting screw until the injector plunger bottoms out; torque
value should be 4.51 N·m (40 in·lbs).
c. Back the adjusting screw off 3/4 of a turn 0.75 mm ± 0.25 mm (0.03 in.±
0.01 in.) and tighten the locknut to 41-47 N·m (30-35 lb·ft).
d. The injector is now adjusted.
The following is from the EPA07 Series 60 Service Manual (6SE2007).
**** Valve Lash Adjustments and E3 Fuel Injector Setting
1. Exhaust Valve Rocker Arm Assembly 4. Rocker Arm Shaft
2. Fuel Injector Rocker Arm Assembly 5. Cylinder Head
3. Camshaft 6. Intake Rocker Arm Assembly
Figure 1. Valve Overlap Period
Adjust the valves and fuel injector settings as follows:
1. Disconnect starting power for engine.
2. Remove the engine valve rocker cover as outlined. Refer to "Removal and
Cleaning of Two-piece Rocker Cover for Diesel Engines Only" for two-piece
rocker cover, and refer to "Removal and Cleaning of Three-piece Rocker Cover"
for three-piece rocker cover.
3. Insert a 3/4 in. drive breaker bar or ratchet into the square hole in the center of
the crankshaft pulley.
4. Bar the engine in the direction of rotation and observe a cylinder where the
injector rocker arm is just beginning to depress the injector plunger, both the
intake and exhaust valves should be closed. See Figure 1.
a. Stop turning the engine and mount a magnetic base dial indicator so you
can monitor the upward lift of travel of that injector lobe.
b. Set the pedestal of the dial indicator on the top of the injector cam roller.
Adjust the pedestal so it can travel the entire upward movement of
the lobe.
c. Continue to slowly bar the engine over in the direction of rotation until the
dial indicator shows no more upward lift. The needle of the dial indicator
will stop moving indicating maximum lift.
d. This is the point of maximum injector roller lift, the injector can now
be set.
e. If you rotate the engine beyond this point you will have to bar the engine
over in the opposite direction at least 1/4 turn and then bar the engine
over in the direction of rotation until maximum injector roller lift
is obtained.
5. Stop engine rotation and note which cylinder this is, and follow the sequence
listed in Table "Valve Lash and Injector Setting Adjustment Sequence" to
correctly set injector and valves.
Max. injector lobe travel on
Cylinder No.
Adjust Injector on
Cylinder No.
Adjust Valves on
Cylinder No.
6 6 2
2 2 4
4 4 1
1 1 5
5 5 3
3 3 6
Table 1. Valve Lash and Injector Setting Adjustment Sequence
6. This injector can now be set using this procedure:
a. Loosen the locknut on the adjusting screw at least two full turns.
b. Tighten the adjusting screw until the injector plunger bottoms out; torque
value should be 4.51 N·m (40 in·lbs).
c. Back the adjusting screw off 3/4 of a turn 0.75 mm ± 0.25 mm (0.03 in.±
0.01in.) and tighten the locknut to 41-47 N·m (30-35 lb·ft).
d. The injector is now adjusted.
7. Adjust the valves on the corresponding cylinders listed in Table "Valve Lash and
Injector Setting Adjustment Sequence”.
NOTICE:
Never set the valves and injector of the same cylinder at the same time. Doing
this will result in engine damage.
8. To adjust the intake valves, insert a 0.203 mm (0.008 in.) feeler gage between
the tip of the valve stem and the valve button at the end of the rocker arm. See
Figure 2.
1. Intake Valve 4. Locknut
2. Valve Button 5. Feeler Gage
3. Intake Rocker Arm Assembly 6. Tip of Intake Valve
Figure 2. Intake Valve Adjustment
9. Loosen the locknut, and turn the adjusting set screw until the feeler gage
produces an even smooth pull between the valve stem and valve button.
10. Torque the locknut to 41 - 47 N·m (30 - 35 lb·ft) and remove the feeler gage.
Reinsert the feeler gage to ensure that the adjustment did not change when the
locknut was tightened. Readjust as necessary.
11. The exhaust valves are adjusted the same way as the intake valves, except use
a 0.508 mm (0.020 in.) feeler gage. See Figure 3.
1. Location of Identification Groove 5. Locknut
2. Valve Button 6. Exhaust Rocker Arm Assembly
3. Allen Wrench 7. Feeler Gage
4. Adjusting Screw 8. Tip of Exhaust Valve
Figure 3. Exhaust Valve Adjustment
12. Repeat steps 4-11 until all injectors and valves have been set.
13. Install the engine rocker cover. Refer to "Installation of Two-Piece and Three-
Piece Rocker Covers" for two and three-piece rocker covers.
14. Reconnect starting power to the engine.
GK 8.5 1993-97 III 23519870 / 871 78.8 (3.103) 0.203 (0.008) 0.660 (0.026)* 750 0.660 (0.026) 5.21-6.27 (0.205-0.247)
MK_E 8.5 2003-04 IV 23527028 / 029 81.0 (3.190) 0.203 (0.008) 0.508 (0.020) 750B 0.584 (0.023) 5.02-6.09 (0.198-0.240)
0.508 mm (0.020 in) lash setting.
* May be equipped with newer replacement cylinder head 23529994 or R23529994 containing Pyromet exhaust valves that require a 0.508 mm (0.020 in) lash setting. Check cylinder head
part number before servicing exhaust valve lash.
750A 0.584 (0.023) 5.54-6.60 (0.218-0.260) 80.3 (3.161) 0.203 (0.008) 0.660 (0.026)*
23522197 / 198
23524893 / 894
TK 8.5 1998-99 IV
23524421 / 422
23524915 / 916
81.0 (3.190) 0.203 (0.008) 0.660 (0.026)**
750 0.660 (0.026) 5.21-6.27 (0.205-0.247)
MK,MK_E 8.5 1999-02 IV 750B 0.584 (0.023) 4.92-5.99 (0.194-0.236)
750 0.660 (0.026) 5.21-6.27 (0.205-0.247)
GK 8.5 1993-97 III 78.8 (3.103) 0.203 (0.008)
78.2 (3.078) 0.203 (0.008) 0.508 (0.020)
23511364 / 785
23524895 / 896
23511364 / 785
23524895 / 896
0.660 (0.026)*
GU 8.5 1993-97 II
DDEC
Jake Brake Lash
mm (inches)
Cam Timing Range
mm (inches)
** Models MK and MK_E with serial numbers after 04R39213 were built with cylinder head 23529994, which contains Pyromet exhaust valves requiring a
SERIES 50 DIESEL VALVE LASH, JAKE BRAKE LASH AND CAM TIMING SPECS
Jake Brake
Model
Camshaft/Assembly
Part Number
Injector Height
mm (inches)
Intake Valve Lash
mm (inches)
Exhaust Valve Lash
mm (inches)
Model Engine Year
SERIES 50 GAS VALVE LASH AND CAM TIMING SPECS
Model Engine Year DDEC
Camshaft/Assembly Part
Number
Intake Valve Lash
mm (inches)
Exhaust Valve Lash
mm (inches)
Service Cam Timing Range
mm (inches)
GKG 8.5 1994-98 III
23519143 / 144
23524891 / 892
0.279 (0.011) 0.914 (0.036) 2.18-2.87 (0.086 -0.113)
TKG 8.5 1998-02 IV
23519143 / 144
23524891 / 892
0.279 (0.011) 0.914 (0.036) 2.18-2.87 (0.086 -0.113)
MKG 8.5 2002-04 IV 23530959 / 919 0.279 (0.011) 0.914 (0.036) 2.18-2.87 (0.086 -0.113)
SERIES 60 GAS VALVE LASH AND CAM TIMING SPECS
Model Engine Year DDEC
Camshaft/Assembly Part
Number
Intake Valve Lash
mm (inches)
Exhaust Valve Lash
mm (inches)
Service Cam Timing Range
mm (inches)
TKG 12.7 1995-98 III
23520286 / 627
23524909 / 910
0.279 (0.011) 0.914 (0.036) 2.18-2.87 (0.086 -0.113)
TKG 12.7 1998-04 IV
23520286 / 627
23524909 / 910
0.279 (0.011) 0.914 (0.036) 2.18-2.87 (0.086 -0.113)
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The 2008 manual for Detroit Diesel Series 60 & Series 50 Camshaft Timing Specifications provides crucial information for optimizing the performance and service life of these engines. It includes specifications for camshaft timing, valve lash, injector height, and Jake Brake lash. These specifications are essential for both professional mechanics and DIY enthusiasts servicing Series 60 and Series 50 diesel and gas engines.
The manual features four charts that consolidate current information for servicing these engines, with most models being for on-highway applications and a few for off-highway. The attached camshaft timing charts are particularly valuable for engine servicing.
It's important to note that if the valve cover option label is missing, illegible, or incorrect, it is necessary to check the camshaft used in the engine. This can be determined by inspecting the part number stamped on the rear face of the camshaft or by using DDCSN to enter the engine serial number. DDCSN will retrieve the model number, which is crucial for correct injector and valve adjustments.
