S14 Rebuild Specs

S14 ENGINE REBUILDING SPECIFICATIONS CHART

Cylinder block

Cylinder bore

Standard size: 3.6771-3.6775 in. 93.40-93.41 mm

Intermediate size: 3.6791-3.6795 in. 93.45-93.46 mm

Overbore 1: 3.6850-3.6854 in. 93.60-94.61 mm

Overbore 2: 3.6929-3.6933 in. 93.80-93.81 mm

Maximum out-of-round: 0.0002 in. 0.005 mm

Maximum taper: 0.0004 in. 0.01 mm

Cylinder head

Cylinder head height

New height: 3.7783-3.7707 in. 95.97-96.03 mm

Minimum machined height: not recommended

Valve guide total length: 1.7022-1.718 in. 43.3-43.7 mm

Valve guide head bore diameter

Standard size: 0.4717 in. 12.0 mm

Overbore 1: 0.4796 in. 12.2 mm

Overbore 2: 0.4953 in. 12.4 mm

Valve guide installed inside diameter

Standard size: 0.2756 in. 7.0 mm

Overbore 1: 0.2796 in. 7.1 mm

Overbore 2: 7.2 mm

Valve guide installing temperature

Cylinder head: +300°F + 150°C

Valve guide: – 240°F -150°C.

Valve guide protrusion: 0.5897 in. 15 mm

Valve seat angle: 35/45/60 degrees

Valve seat width

Intake: 0.047-0.051 in. 1.2-1.3 mm

Exhaust: 0.055-0.059 in. 1.4-1.5 mm

Valve seat diameter

Intake: 1.441-1.445 in. 36.6-36.7 mrn

Exhaust: 1.236-1.240 in. 31.4-31.5 mm

Crankshaft

Main bearing diameter

Double classification

Standard size

Red: 2.1649-2.1645 in. 54.990-54.980 mm

Blue: 2.1645-2.1 642 in. 54.980-54.971 mm

Undersize 1

Red: 2.1551-2.1547 in. 54.740-54.730 mm

Blue: 2.1547-2.1543 in. 54.730-54.721 mm

Undersize 2

Red: 2.1452-2.1448 in. 54.490-54.480 mm

Blue: 2.1448-2.1445 in. 54.480-54.471 mm

Undersize 3

Red: 2.1354-2.1350 in. 54.240-54.230 mm

Blue: 2.1350-2.1346 in. 54.230-54.221 mm

Triple classification

Standard size

Yellow: 2.1647-2.1649 in. 54.984-54.990 mm

Green: 2.1644-2.1647 in. 54.977-54.983 mm

White: 2.1642-21644 in. 54.971-54.976 mm

Undersize 1, 0.25mm

Yellow: 2.1549-2.1551 in. 54.734-54.740 mm

Green: 2.1546-2.1548 in. 54.727-54.733 mm

White: 2.1544-2.1546 in. 54.721-54.726 mm

 

Undersize 2, 0.50mm

Yellow: 2.1450-2.1453 in. 54.484-54.490 mm

Green: 2.1447-2.1450 in. 54.477-54.483 mm

White: 2.1445-2.1447 in. 54.471-2.1447 mm

Undersize 3, 0.75mm

Yellow: 2.1 352-2.1354 in. 54.234-54.240 mm

Green: 2.1349-2.1351 in. 54.227-54.233 mm

White: 2.1347-2.1349 in. 54.221-54.226 mm

Crankshaft main bearing clearance

Double classification: 0.0012-0.0027 in. 0.03-0.07 mm

Triple classification: 0.0008-0.0018 in. 0.020-0.046 mm

Crankshaft thrust bearing ground size

Standard size: 1.1811 in. 30.0 mm

Oversize 1: 1.890 in. 30.2 mm

Oversize 2: 1.1968 in. 30.4 mm

Oversize 3: 1.2047 in. 30.6 mm

Crankshaft end play: 0.0033-0.0068 in. 0.085-0.174 mm

Connecting rod bearing journal ground size

Standard size: 1.8888-1.8894 in. 47.975-47.991 mm

Undersize 1, 0.25rnm: 1.8789-1.8796 in. 47.725-47.741 mm

Undersize 2, 0.50mm: 1.8691-1.8697 in. 47.475-47.491 mm

Undersize 3, 0.75mm: 1.8592-1.8599 in. 47.225-47.241 mm

Connecting rod bearing clearance

Standard classification: 0.0012-0.0027 in. 0.03-0.07 mm

Double classification: 0.0008-0.0022 in. 0.020-0.055 mm

Crankshaft runout at center main: 0.004 in. 0.1 mm

Connecting rods

Bushing diameter

Outside: 0.9449-0.9457 in. 24.000-24.021 mm

Inside: 0.8669-0.8671 in. 22.020-22.024 mm

Maximum weight deviation in engine without bearing shells

Total: ±0.14 oz. ±4g

Big end: ±0.07 oz. ±2g

Small end: ±0.07 ±2g

Big end bore

Red: 2.0427-2.0475 in. 52.000-52.008 mm

Blue: 2.0476-2.0479 in. 52.009-52.016 mm

Standard: 2.0472-2.0476 in. 52.000-52.010 mm

Pistons

Piston diameter-measured 0.236 in. (6.00mm) from bottom of the skirt

Standard size: 3.675 in. 93.35 mm

Intermediate size: 3.677 in. 93.40 mm

Overbore 1: 3.683 in. 93.55 mm

Overbore 2: 3.691 in. 93.75 mm

Piston clearance

New engine: 0.0012-0.0024 in. 0.03-0.06 mm

Used engine: 0.006 in. 0.15 mm

Piston rings

Top compression

End clearance: 0.0118-0.0216 in. 0.30-0.55 mm

Side clearance: 0.0023-0.0035 in. 0.06-0.09 mm

Bottom compression

End clearance: 0.0118-0.0216 in. 0.30-0.55 mm

Side clearance: 0.0023-0.0035 in. 0.06-0.09 mm

Oil control

End clearance: 0.0098-0.0196 in. 0.25-0.50 mm

Side clearance: 0.0007-0.0019 in. 0.02-0.05 mm

Camshaft

End play: 0.004-0.006 in. 0.1-0.15 mm

Bearing clearance: 0.001 1-0.0021 in. 0.027-0.053 mm

Tappet bore diameter: 1.4764-1.4770 in. 37.500-37.516 mm

Tappet bore clearance: 0.001 0-0.0026 in. 0.025-0.066 mm

 

Valves

Valve lash

Cold: 0.010-0.014 in. 0.26-0.35 mm

Operating temperature: 0.013-0.015 in. 0.34-0.39 mm

Head edge thickness

Intake: 0.020 in. 0.50 mm

Exhaust: 0.037 in. 0.95 mm

Head diameter

Intake: 1.457 in. 37 mm

Exhaust: 1.260 in. 32 mm

Stem diameter

Standard size: 0.275 in. 7.0 mm

Oversize 1: 0.279 in. 7.1 mm

Oversize 2: 0.283 in. 7.2 mm

Stem to guide tilt clearance

Intake: 0.025 in. 0.65 mm

Exhaust: 0.031 in. 0.80 mm

Oil pump

Pressure at idle: 7-28 psi 0.5-2.0 bar

Pressure at top speed: 57-85 psi 4.0-6.0 bar

Pressure relief valve spring length

Operating pressure valve: 2.677 in. 68.0 mm

Bypass pressure valve: 1.732 in. 44 mm

Vibration damper

Radial runout, maximum: 0.012 in. 0.3 mm

Axial runout, maximum: 0.012 in. 0.3 mm

 

 

Data compiled from Chilton repair manual 18400  18400