Vauxhall Workshop Service and Repair Manuals

Crank Drive, Cylinder Block (X 25 XE, Y 26 SE)  

Illustration     1  Main Bearing Journals   2  Con-rod bearing journal   3  3 Main Bearing Journals (Guide Bearing)   4  Crankshaft colour code   5  Bearing shell colour code   6  Bearing shell identification

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
Crankshaft dimensions			Ø Main Bearing Journals   1 to 4	Code
	Standard size	mm	67.980 to 67.988	green
		mm	67.988 to 67.996	brown
	Undersize (0.25)	mm	67.730 to 67.738	green / blue
		mm	67.738 to 67.746	brown / blue
	Undersize (0.50)	mm	67.480 to 67.488	green / white
		mm	67.488 to 67.496	brown / white
			3 wide main bearing journals (guide bearing)
	Standard size	mm	24.500 to 24.552	-
	Undersize (0.20)	mm	24.700 to 24.752	-
	Undersize (0.40)	mm	24.900 to 24.952	-

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
			Ø Con-rod bearing journal   1 to 6	Code
	Standard size	mm	48.971 to 48.990	-
	Undersize (0.25)	mm	48.721 to 48.740	blue
	Undersize (0.50)	mm	48.471 to 48.490	white

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
Crankshaft bearings 1, 2			Lower crankshaft bearing shell
			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 to 1.995	677 N
		mm	green	1.995 to 2.001	678 N
	Undersize (0.25)	mm	brown / blue	2.114 to 2.120	679 A
		mm	green / blue	2.120 to 2.126	680 A
	Undersize (0.50)	mm	brown / white	2.239 to 2.245	915 B
		mm	green / white	2.245 to 2.251	916 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 to 1.995	673 N
		mm	green	1.995 to 2.001	674 N
	Undersize (0.25)	mm	brown / blue	2.114 to 2.120	675 A
		mm	green / blue	2.120 to 2.126	676 A
	Undersize (0.50)	mm	brown / white	2.239 to 2.245	913 B
		mm	green / white	2.245 to 2.251	914 B
Perm. crankshaft bearing clearance		mm	0.014 to 0.043
Perm. crankshaft end clearance		mm	0.100 to 0.760
Perm. out-of-round		mm	0.050

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
Crankshaft bearing (3) (guide bearing)			Lower crankshaft bearing shell
			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 to 1.995	685 N
		mm	green	1.995 to 2.001	686 N
	Undersize (0.25)	mm	brown / blue	2.114 to 2.120	007 A
		mm	green / blue	2.120 to 2.126	008 A
	Undersize (0.50)	mm	brown / white	2.239 to 2.245	009 B
		mm	green / white	2.245 to 2.251	10 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 to 1.995	685 N
		mm	green	1.995 to 2.001	686 N
	Undersize (0.25)	mm	brown / blue	2.114 to 2.120	007 A
		mm	green / blue	2.120 to 2.126	008 A
	Undersize (0.50)	mm	brown / white	2.239 to 2.245	009 B
		mm	green / white	2.245 to 2.251	10 B

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
3 wide main bearing journals (guide bearing)			Colour code	Thickness	Code
	Standard size	mm	brown - green	24.350 to 24.400	-
	Undersize (0.25)	mm	brown / blue   green / blue	24.550 to 24.600	-
	Undersize (0.50)	mm	brown / white   green / white	24.750 to 24.800	-

Crank Drive, Cylinder Block (Continued)  

Engine			X 25 XE
Con-rod bearing			Lower con-rod bearing shell
			Colour code	Thickness	Identification GM 124
	Standard size	mm	-	1.490 to 1.500	104 N
	Undersize (0.25)	mm	blue	1.615 to 1.625	105 A
	Undersize (0.50)	mm	white	1.740 to 1.750	106 B
			Upper con-rod bearing shell
	Standard size	mm	-	1.490 to 1.500	104 N
	Undersize (0.25)	mm	blue	1.615 to 1.625	105 A
	Undersize (0.50)	mm	white	1.740 to 1.750	106 B
Perm. con-rod play		mm	0.010 to 0.061

 

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 or double trapezoidal ring   5  Rectangular compression ring   6  Piston diameter

Crank Drive, Cylinder Block (Continued)  

Engine				X 25 XE
Ø Cylinder bore
	Standard size
		Coefficient 8	mm	81.575 to 81.585
		Coefficient 99	mm	81.585 to 81.595
		Coefficient 00	mm	81.595 to 81.605
		Coefficient 01	mm	81.605 to 81.615
		Coefficient 02	mm	81.615 to 81.625
	Oversize 1)
		Index 7 + 0.5	mm	82.065 to 82.075
Ø Piston
	Standard size
		Coefficient 8	mm	81.540 to 81.550
		Coefficient 99	mm	81.550 to 81.560
		Coefficient 00	mm	81.560 to 81.570
		Coefficient 01	mm	81.570 to 81.580
		Coefficient 02	mm	81.580 to 81.590
	Oversize
		Index 7 + 0.5	mm	82.030 to 82.040
Piston clearance			mm	0.025 to 0.045
Piston projection			mm	0.45

1)  After re-boring the old index must be invalidated and the new oversizing index must be embossed.  

Crank Drive, Cylinder Block (Continued)  

Engine				X 25 XE, Y 26 SE
Piston rings
	Rectangular compression ring
		Height	mm	1.50
		Gap	mm	0.30 to 0.50
		Vertical play	mm	0.02 to 0.04
	Tapered compression ring
		Height	mm	1.5
		Gap	mm	0.30 to 0.50
		Vertical play	mm	0.02 to 0.04
	Oil scraper ring
		Height	mm	3.0
		Gap	mm	0.4 to 1.4
		Vertical play	mm	0.01 to 0.03

Crank Drive, Cylinder Block (Continued)  

Engine				X 25 XE, Y 26 SE
Piston pin
	Length		mm	55.7 to 56.0
	Diameter		mm	20.990 to 21.000
	Bearing			shrink-fit in con-rod
	Clearance
		in piston	mm	0.011 to 0.014
		in con-rod	mm	0