2004 ISUZU TF SERIES Workshop Manual

Page 1201 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 61 
 
 INSPECTION AND REPAIR 
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during 
inspection. 
 
 
 
 
 CYLINDER

Page 1202 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 62  ENGINE MECHANICAL 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Manifold Fitting Face Warpage 
Use a straight edge and a feeler gauge to measure the 
manifold cylinder head fitting face wa

Page 1203 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 63 
 
 
  Measuring Method-II 
1.  Measure the valve stem outside diameter. 
Refer to the Item "Valve Stem Outside Diameter". 
2.  Use a caliper calibrator or a telescoping

Page 1204 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 64  ENGINE MECHANICAL 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 Valve Stem Outside Diameter 
Measure the valve stem diameter at three points. 
If the measured value is less than the specified limit, the v

Page 1205 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 65 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Valve Contact Width 
1.  Check the valve contact faces for roughness and 
unevenness. Make smooth the valve contact surfaces. 
2.  Meas

Page 1206 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 66  ENGINE MECHANICAL 
 
 
 Valve Seat Insert Installation 
1.  Carefully place the attachment (1) (having a smaller 
outside diameter than the valve seat insert) on the valve 
seat insert (2).

Page 1207 of 4264

ISUZU TF SERIES 2004  Workshop Manual ENGINE MECHANICAL   6A – 67 
 
  
 
 
 
 
 
 
 
 
 
 
 
 Valve Spring Free Height 
Use a vernier caliper to measure the valve spring free height. 
If the measured value is less than the specified li

Page 1208 of 4264

ISUZU TF SERIES 2004  Workshop Manual 6A – 68  ENGINE MECHANICAL 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 ROCKER ARM SHAFT AND ROCKER ARM 
Rocker Arm Shaft Run-Out 
1.  Place the rocker arm shaft on a V-block. 
2.