Cylinder Head Assembly: Specifications

Cylinder Head Bolts:
Always install new cylinder head bolts.
Tighten all bolts in a single sequence 50 Nm
Back the bolts off 1/2 turn.
Tighten the bolts in sequence shown 50 Nm
Rotate all the bolts in a single sequence an additional 180 degrees in two steps of 90 degrees each.

Cylinder Head and Valve Train
Valve guide inner diameter (I.D.) 8.063-8.094 mm
Intake and exhaust 8.063-8.094 mm
Valve seats width - intake and exhaust 1.75-2.32 mm
Angle 45 degrees
Runout (total indicated runout [T.I.R.]) 0.064 mm MAX
Bore diameter (insert counterbore diameter) intake 39.940 mm MIN.
39.965 mm MAX.
Bore diameter (insert counterbore diameter) exhaust 34.940 mm MIN.
39.965 mm MAX.
Gaskets surface flatness 0.04 mm/26 mm, 0.08 mm/156 mm,
0.15 mm Total
Head face surface finish 0.2/2.5 0.8 mm
Valve stem to guide clearance intake 0.020-0.069 mm
Valve stem to guide clearance exhaust 0.049-0.095 mm
Valve head diameter intake 41.9-42.1 mm
Valve head diameter exhaust 34.9-35.1 mm
Valve face runout limit intake and exhaust 0.005 mm
Valve face angle 45.5 degrees
Valve stem diameter standard (std.) intake 8.025-8.043 mm
Valve stem diameter standard (std.) exhaust 8.006-8.017 mm
Valve springs 4.3 turns
Compression pressure - loaded 83.0 N g 29.27 mm
Compression pressure - unloaded 350 N g 39.53 mm
Free length (approximate) 52.4 mm
Installed spring height 39.53 mm
Valve springs assembled height 39.53 mm
Service limit, pressure lost @ specified height % 5 mm





Tighten the Intake Manifold studs in two stages.
Stage 1 10 Nm
Stage 2 90 degrees

Camshaft pulley bolt 105 Nm (77 ft. lbs.)





Exhaust manifold nuts 27 Nm (20 ft. lbs.)