TECHNICAL DATA

TD-8spec table

Spec values for K8 DOHC (1.8L V6) engine.

Engine — K8 DOHC technical data (piston ring, piston pin, connecting rod, crankshaft, bearings)

Item	Sub-item	Detail	K8 DOHC
Piston ring — Thickness mm {in}	Top		1.47–1.50 {0.0579–0.0590}
Piston ring — Thickness mm {in}	Second		1.47–1.49 {0.0579–0.0586}
Piston ring — End gap (measured in the cylinder) mm {in}	Top		0.15–0.28 {0.006–0.011}
Piston ring — End gap (measured in the cylinder) mm {in}	Second		0.25–0.38 {0.010–0.014}
Piston ring — End gap (measured in the cylinder) mm {in}	Oil (rail)		0.20–0.70 {0.008–0.027}
Piston ring — End gap (measured in the cylinder) mm {in}	Maximum		1.0 {0.039}
Ring groove width in piston mm {in}	Top		1.520–1.535 {0.0599–0.0604}
Ring groove width in piston mm {in}	Second		1.520–1.535 {0.0599–0.0604}
Ring groove width in piston mm {in}	Oil		3.02–3.04 {0.1189–0.1196}
Piston ring-to-ring groove clearance mm {in}	Top		0.020–0.065 {0.008–0.0025}
Piston ring-to-ring groove clearance mm {in}	Second		0.030–0.065 {0.0012–0.0025}
Piston ring-to-ring groove clearance mm {in}	Maximum		0.15 {0.006}
Piston pin — Diameter mm {in}			18.974–18.980 {0.7470–0.7472}
Piston pin — Piston-to-piston pin clearance mm {in}			0.008–0.026 {0.0004–0.0010}
Connecting rod — Length (center to center) mm {in}			140.60–140.70 {5.538–5.539}
Connecting rod — Bending mm {in}			0.15 {0.059} / 100 {3.937}
Connecting rod — Small end bore (bush inner diameter) mm {in}			18.943–18.961 {0.7458–0.7464}
Connecting rod — Big end bore mm {in}			51.000–51.015 {2.0079–2.0084}
Connecting rod — Big end width mm {in}			21.338–21.390 {0.8401–0.8421}
Connecting rod side clearance mm {in}	Standard		0.178–0.330 {0.0070–0.0129}
Connecting rod side clearance mm {in}	Maximum		0.40 {0.016}
Crankshaft — Crankshaft runout mm {in}			0.04 {0.0016} max.
Main journal diameter mm {in}	Standard size	Standard	61.938–61.955 {2.4385–2.4391}
Main journal diameter mm {in}	Standard size	Minimum	61.931 {2.4382}
Main journal diameter mm {in}	0.25 {0.010} undersize	Standard	61.688–61.705 {2.4287–2.4293}
Main journal taper and out-of-round			0.05 {0.020} max.
Crankpin diameter mm {in}	Standard size	Standard	47.940–47.955 {1.8874–1.8879}
Crankpin diameter mm {in}	Standard size	Minimum	47.935 {1.8872}
Crankpin diameter mm {in}	0.25 {0.010} undersize	Standard	47.690–47.705 {1.8776–1.8781}
Crankpin taper and out-of-round mm {in}			0.05 {0.020} max.
Main bearing — Main journal bearing oil clearance mm {in}	Standard		0.037–0.057 {0.0015–0.0022}
Main bearing — Main journal bearing oil clearance mm {in}	Maximum		0.064 {0.0025}
Main bearing — Available undersized bearing mm {in}			0.25 {0.010}
Crankpin bearing — Crankpin bearing oil clearance mm {in}	Standard		0.023–0.043 {0.0009–0.0016}
Crankpin bearing — Crankpin bearing oil clearance mm {in}	Maximum		0.08 {0.0031}
Crankpin bearing — Available undersized bearing mm {in}			0.25 {0.010}

Piston ring — Thickness mm {in}

Sub-itemTop

Detail

K8 DOHC1.47–1.50 {0.0579–0.0590}

Piston ring — Thickness mm {in}

Sub-itemSecond

Detail

K8 DOHC1.47–1.49 {0.0579–0.0586}

Piston ring — End gap (measured in the cylinder) mm {in}

Sub-itemTop

Detail

K8 DOHC0.15–0.28 {0.006–0.011}

Piston ring — End gap (measured in the cylinder) mm {in}

Sub-itemSecond

Detail

K8 DOHC0.25–0.38 {0.010–0.014}

Piston ring — End gap (measured in the cylinder) mm {in}

Sub-itemOil (rail)

Detail

K8 DOHC0.20–0.70 {0.008–0.027}

Piston ring — End gap (measured in the cylinder) mm {in}

Sub-itemMaximum

Detail

K8 DOHC1.0 {0.039}

Ring groove width in piston mm {in}

Sub-itemTop

Detail

K8 DOHC1.520–1.535 {0.0599–0.0604}

Ring groove width in piston mm {in}

Sub-itemSecond

Detail

K8 DOHC1.520–1.535 {0.0599–0.0604}

Ring groove width in piston mm {in}

Sub-itemOil

Detail

K8 DOHC3.02–3.04 {0.1189–0.1196}

Piston ring-to-ring groove clearance mm {in}

Sub-itemTop

Detail

K8 DOHC0.020–0.065 {0.008–0.0025}

Piston ring-to-ring groove clearance mm {in}

Sub-itemSecond

Detail

K8 DOHC0.030–0.065 {0.0012–0.0025}

Piston ring-to-ring groove clearance mm {in}

Sub-itemMaximum

Detail

K8 DOHC0.15 {0.006}

Piston pin — Diameter mm {in}

Sub-item

Detail

K8 DOHC18.974–18.980 {0.7470–0.7472}

Piston pin — Piston-to-piston pin clearance mm {in}

Sub-item

Detail

K8 DOHC0.008–0.026 {0.0004–0.0010}

Connecting rod — Length (center to center) mm {in}

Sub-item

Detail

K8 DOHC140.60–140.70 {5.538–5.539}

Connecting rod — Bending mm {in}

Sub-item

Detail

K8 DOHC0.15 {0.059} / 100 {3.937}

Connecting rod — Small end bore (bush inner diameter) mm {in}

Sub-item

Detail

K8 DOHC18.943–18.961 {0.7458–0.7464}

Connecting rod — Big end bore mm {in}

Sub-item

Detail

K8 DOHC51.000–51.015 {2.0079–2.0084}

Connecting rod — Big end width mm {in}

Sub-item

Detail

K8 DOHC21.338–21.390 {0.8401–0.8421}

Connecting rod side clearance mm {in}

Sub-itemStandard

Detail

K8 DOHC0.178–0.330 {0.0070–0.0129}

Connecting rod side clearance mm {in}

Sub-itemMaximum

Detail

K8 DOHC0.40 {0.016}

Crankshaft — Crankshaft runout mm {in}

Sub-item

Detail

K8 DOHC0.04 {0.0016} max.

Main journal diameter mm {in}

Sub-itemStandard size

DetailStandard

K8 DOHC61.938–61.955 {2.4385–2.4391}

Main journal diameter mm {in}

Sub-itemStandard size

DetailMinimum

K8 DOHC61.931 {2.4382}

Main journal diameter mm {in}

Sub-item0.25 {0.010} undersize

DetailStandard

K8 DOHC61.688–61.705 {2.4287–2.4293}

Main journal taper and out-of-round

Sub-item

Detail

K8 DOHC0.05 {0.020} max.

Crankpin diameter mm {in}

Sub-itemStandard size

DetailStandard

K8 DOHC47.940–47.955 {1.8874–1.8879}

Crankpin diameter mm {in}

Sub-itemStandard size

DetailMinimum

K8 DOHC47.935 {1.8872}

Crankpin diameter mm {in}

Sub-item0.25 {0.010} undersize

DetailStandard

K8 DOHC47.690–47.705 {1.8776–1.8781}

Crankpin taper and out-of-round mm {in}

Sub-item

Detail

K8 DOHC0.05 {0.020} max.

Main bearing — Main journal bearing oil clearance mm {in}

Sub-itemStandard

Detail

K8 DOHC0.037–0.057 {0.0015–0.0022}

Main bearing — Main journal bearing oil clearance mm {in}

Sub-itemMaximum

Detail

K8 DOHC0.064 {0.0025}

Main bearing — Available undersized bearing mm {in}

Sub-item

Detail

K8 DOHC0.25 {0.010}

Crankpin bearing — Crankpin bearing oil clearance mm {in}

Sub-itemStandard

Detail

K8 DOHC0.023–0.043 {0.0009–0.0016}

Crankpin bearing — Crankpin bearing oil clearance mm {in}

Sub-itemMaximum

Detail

K8 DOHC0.08 {0.0031}

Crankpin bearing — Available undersized bearing mm {in}

Sub-item

Detail

K8 DOHC0.25 {0.010}

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TECHNICAL DATA

Engine — K8 DOHC technical data (piston ring, piston pin, connecting rod, crankshaft, bearings)

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