Table 1-2. Repair and Replacement Standards - (Cont) Components Connecting   rods: Piston pin diameter Piston pin bushing length in connecting rod Piston  pin  to  connecting  rod  bushing  clearance Bore in connecting rod for piston pin bushing Exhaust valves: Valve lift (at valve) w/0.015 inch lash Valve lift (at cam) Seat angle Valve  seat  contact  width Valve lash (cold) Valve  lash  (engine  coolant  at  normal  operating temperature) Head  diameter Overall  length Stem diameter Valve must be recessed (in head) Exhaust  and  intake  valve  springs: Valve spring free length (spring only or spring w/damper) Valve  spring  length  (valve  closed)  (spring  only or spring w/damper) Valve  spring  length (valve open) (spring only or spring w/damper) Spring load at 2.237 length spring w/damper Spring load at 2.237 length Spring  only Spring load at 1.780 length Spring  w/damper Spring load at 1.780 length Spring  only NOTE Install new spring when old spring is 5% below the low limit or 5% above the high limit. Manufacturer’s dimensions  and tolerances  in inches Minimum 1.5011 1.490 0.0014 1.6250 1.646 0.3705 0.053 2-17/32 40 lbs 38 lbs 108 lb 95 lbs Maximum 1.5013 1.510 0.0021 1.6255 0.4125 0.285 30° 3/32 0.018 0.015 1.656 6.017 0.3710 approx 2.237 1.780 46 lbs 42 lbs 115 lbs 105 lbs Maximum wear and clearance 0.0002 0.010 0.001 0.0005 --- - -- --- 1/64 ---- ---- 0.010 0.010 0.001 ---- ---- ---- ---- ---- 1-39