2004 ISUZU TF SERIES Workshop Manual

Page 1209 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 69 
   3.  Check that the rocker arm oil port is free of obstructions. 
If necessary, use compressed air to clean the rocker arm 
oil port. 
 
 
  
 
 Rocker Arm Correction

Page 1210 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 70  ENGINE MECHANICAL 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Cylinder Liner Bore Measurement 
Use a cylinder indicator to measure the cylinder bore at 
measuring point (1) in the thrust (

Page 1211 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 71 
 
  
 
 
 
 
 
 
 
 
 
 Cylinder Liner Grade Selection 
Subtract the average cylinder body bore from the average 
cylinder liner outside diameter to obtain the fitting i

Page 1212 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 72  ENGINE MECHANICAL 
  
 
 012RY00022  
A mark was stamped on the upper side of the cylinder block 
during production to indicate the correct liner. 
The liner grade (i.e.1.2.3.4) is indicate

Page 1213 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 73 
 
 
 
 
 
 
Cylinder Liner Installation 
1.  Cylinder Liner Installation Using The Special Tool 
1.  Use new kerosene or diesel oil to thoroughly clean the 
cylinder lin

Page 1214 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 74  ENGINE MECHANICAL 
  
 
 
 
 
 
 
 
 
 
 Piston Grade Selection 
Measure the cylinder liner bore after installing the cylinder liner. 
Then select the appropriate piston grade for the insta

Page 1215 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 75 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2.  Measure the piston diameter. 
 
 
Piston Measuring Point  mm (in)
4JA1T(L) 
4JA1

Page 1216 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 76  ENGINE MECHANICAL 
  Tappet Outside Diameter 
Measure the tappet outside diameter with a micrometer. 
If the measured value is less than the specified limit, the tappet 
must be replaced.