Vauxhall Workshop Service and Repair Manuals

 

Crank Drive, Cylinder Block (X 20 DTL, X 20 DTH)   Illustration     1  Main bearing   2  Con-rod bearing   3  Guide bearing   4  Crankshaft colour code   5  Bearing shell colour code   6  Bearing shell identification number

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Crankshaft dimensions			Ø Main Bearing Journals	Colour code
			1 - 5
	Standard size	mm	67.966 - 67.974	green
		mm	67.974 - 67.982	brown
	Undersize (0.25)	mm	67.716 - 67.724	green / blue
		mm	67.724 - 67.732	brown / blue
	Undersize (0.50)	mm	67.466 - 67.474	green / violet
		mm	67.474 - 67.482	brown / violet
			Ø Con-rod bearing journal	Colour code
			1 - 4
	Standard size	mm	48.971 - 48.990	-
	Undersize (0.25)	mm	48.721 - 48.740	blue
	Undersize (0.50)	mm	48.471 - 48.490	purple

Crank Drive, Cylinder Block (Continued)  

Engine		X 20 DTL, X 20 DTH
Crankshaft dimensions		Wide main bearing journals (guide bearing)	Colour code
Standard size	mm	25.950 - 26.002	-
Undersize (0.20)	mm	26.150 - 26.202	-
Undersize (0.40)	mm	26.350 - 26.402	-
Permissible crankshaft bearing clearance	mm	0.016 - 0.069
Permissible crankshaft longitudinal play	mm	0.01 - 0.02
Permissible lateral runout deviation	mm	0.03

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Crankshaft bearing			Lower crankshaft bearing shell
1, 2, 4, 5			Colour code	Thickness	Code
					GM 174
	Standard size	mm	brown	1.989 - 1.995	919 N
		mm	green	1.995 - 2.001	920 N
	Undersize (0.25)	mm	brown / blue	2.114 - 2.120	921 A
		mm	green / blue	2.120 - 2.126	922 A
	Undersize (0.50)	mm	brown / violet	2.239 - 2.245	923 B
		mm	green / violet	2.245 - 2.251	924 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 - 1.995	926 N
		mm	green	1.995 - 2.001	927 N
	Undersize (0.25)	mm	brown / blue	2.114 - 2.120	928 A
		mm	green / blue	2.120 - 2.126	929 A
	Undersize (0.50)	mm	brown / violet	2.239 - 2.245	930 B
		mm	green / violet	2.245 - 2.251	931 B

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Crankshaft bearing			Lower crankshaft bearing shell
3 - guide bearing			Colour code	Thickness	Code
					GM 174
	Standard size	mm	brown	1.989 - 1.995	933 N
		mm	green	1.995 - 2.001	934 N
	Undersize (0.25)	mm	brown / blue	2.114 - 2.120	935 A
		mm	green / blue	2.120 - 2.126	936 A
	Undersize (0.50)	mm	brown / violet	2.239 - 2.245	937 B
		mm	green / violet	2.245 - 2.251	938 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 - 1.995	947 N
		mm	green	1.995 - 2.001	948 N
	Undersize (0.25)	mm	brown / blue	2.114 - 2.120	949 A
		mm	green / blue	2.120 - 2.126	950 A
	Undersize (0.50)	mm	brown / violet	2.239 - 2.245	951 B
		mm	green / violet	2.245 - 2.251	952 B

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine		X 20 DTL, X 20 DTH
3 wide main bearing journals (guide bearing)		Colour code	Thickness	Code
Standard size	mm	brown - green	25.850 - 25.900	-
Undersize (0.25)	mm	brown / blue   green / blue	26.050 - 26.100	-
Undersize (0.50)	mm	brown / violet   green / violet	26.250 - 26.300	-

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Con-rod bearing			Lower con-rod bearing shell
			Colour code	Thickness	Code
					GM 272
	Standard size	mm	-	1.490 - 1.500	954 N
	Undersize (0.25)	mm	blue	1.615 - 1.625	955 A
	Undersize (0.50)	mm	purple	1.740 - 1.750	115 B

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL
Con-rod bearing			Upper con-rod bearing shell
			Colour code	Thickness	Code
					GM 42
	Standard size	mm	-	1.490 - 1.500	957 N
	Undersize (0.25)	mm	blue	1.615 - 1.625	958 A
	Undersize (0.50)	mm	purple	1.740 - 1.750	116 B
Permissible con-rod bearing play		mm	0.010 - 0.061

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTH
Con-rod bearing			Upper con-rod bearing shell
			Colour code	Thickness	Code
					GM 199
	Standard size	mm	green	1.490 - 1.500	118 N
	Undersize (0.25)	mm	blue / green	1.615 - 1.625	119 A
	Undersize (0.50)	mm	violet / green	1.740 - 1.750	120 B
Permissible con-rod bearing play		mm	0.010 - 0.061

See corresponding illustration.

 

Crank Drive, Cylinder Block (Continued)   Illustration     1  Index - identification of cylinder bore   2  Cylinder bore   3  Double bevelled ring with spiral-type expander   4  Tapered compression ring   5  Rectangular ring (or double trapezoidal ring)   6  Piston diameter

Crank Drive, Cylinder Block (Continued)  

Engine				X 20 DTL	X 20 DTH
Ø Cylinder bore
	Standard size
		Coefficient 8	mm	83.975 - 83.985	83.975 - 83.985
		Coefficient 99	mm	83.985 - 83.995	83.985 - 83.995
		Coefficient 00	mm	83.995 - 84.005	83.995 - 84.005
		Coefficient 01	mm	84.005 - 84.015	84.005 - 84.015
		Coefficient 02	mm	84.015 - 84.025	84.015 - 84.025
	Oversize
		Index 8 + 0.5	mm	84.475 - 84.485	84.475 - 84.485
Ø Piston
	Standard size
		Coefficient 8	mm	83.905 - 83.915	83.885 - 83.895
		Coefficient 99	mm	83.915 - 83.925	83.895 - 83.905
		Coefficient 00	mm	83.925 - 83.935	83.905 - 83.915
		Coefficient 01	mm	83.935 - 83.945	83.915 - 83.925
		Coefficient 02	mm	83.945 - 83.955	83.925 - 83.935
	Oversize
		Index 8 + 0.5	mm	84.405 - 84.415	84.385 - 84.395
Piston installation play			mm	0.06 - 0.08	0.08 - 0.10

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Piston projection			Thickness of cylinder head gasket	Cylinder head gasket code
Dimension
	0.40 - 0.50 mm	mm	1.20	-
	0.51 - 0.60 mm	mm	1.30	1 notch
	0.61 - 0.70 mm	mm	1.40	2 notches

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine				X 20 DTL	X 20 DTH
Piston rings
	Rectangular compression ring
		Height	mm	2.00	-
		Gap	mm	0.30 - 0.50	-
		Vertical play	mm	0.11 - 0.15	-
	Double trapezoidal ring
		Height	mm	-	2.50
		Gap	mm	-	0.30 - 0.50
		Vertical play	mm	-	0.02 - 0.04
	Tapered compression ring
		Height	mm	1.75	1.75
		Gap	mm	0.30 - 0.50	0.30 - 0.50
		Vertical play	mm	0.05 - 0.09	0.05 - 0.09
	Double bevelled ring with spiral-type expander
		Height	mm	3.00	3.00
		Gap	mm	0.40 - 1.40	0.40 - 1.40
		Vertical play	mm	0.03 - 0.07	0.03 - 0.07
Ring gap distribution 1)			°	120	120

1)  Arrange gap of the upper oil scraper ring 25 to 50 mm offset to the left and gap of bottom oil scraper ring 25 to 50 mm offset to the right of intermediate ring gap.  

See corresponding illustration.

Crank Drive, Cylinder Block (Continued)  

Engine			X 20 DTL, X 20 DTH
Piston pin
	Length	mm	68
	Diameter	mm	29
	Bearing		floating
	Clearance
	in piston	mm	-
	in con-rod	mm	-

See corresponding illustration.