Vauxhall Workshop Service and Repair Manuals > Omega B > J Engine and Engine Aggregates | DOHC Petrol Engine | Cylinder Block | Specifications | Crank Drive, Cylinder Block - V6 Block

Torque guideline values - DOHC II (DOHC Engine) > < V6 DOHC Petrol Engines X 25 XE, Y 26 SE, X 30 XE, Y 32 SE - Engine Identification/Engine Number

Crank Drive, Cylinder Block – V6

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

Engine			X 25 XE, Y 26 SE, X 30 XE, Y 32 SE

Crankshaft dimensions			Ø Main bearing journals	Colour code
			1 – 3
	Standard size	mm	67.980 – 67.988	green
		mm	67.988 – 67.996	brown
	Undersize (0.25)	mm	67.730 – 67.738	green / blue
		mm	67.738 – 67.746	brown / blue
	Undersize (0.50)	mm	67.480 – 67.488	green / white
		mm	67.488 – 67.496	brown / white
			Width of main bearing journal 4
			(guide bearing)
	Standard size	mm	24.500 – 24.552	–
	Undersize (0.20)	mm	24.700 – 24.752	–
	Undersize (0.40)	mm	24.900 – 24.952	–

Engine			X 25 XE, Y 26 SE

			Ø Con-rod bearing journal	Colour code
			1 – 6
	Standard size	mm	48.971 – 48.990	–
	Undersize (0.25)	mm	48.721 – 48.740	blue
	Undersize (0.50)	mm	48.471 – 48.490	white

Engine			X 30 XE, Y 32 SE

			Ø Con-rod bearing journal	Colour code
			1 – 6
	Standard size	mm	53.971 – 53.990	–
	Undersize (0.25)	mm	53.721 – 53.740	blue
	Undersize (0.50)	mm	53.471 – 53.490	white

Engine			X 25 XE, X 30 XE

Crankshaft bearing			Lower crankshaft bearing shell
1, 2, 3			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 – 1995	677 N
		mm	green	1.995 – 2.001	678 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	679 A
		mm	green / blue	2.120 – 2.126	680 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	915 B
		mm	green / white	2.245 – 2.251	916 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 – 1.995	673 N
		mm	green	1.995 – 2.001	674 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	675 A
		mm	green / blue	2.120 – 2.126	676 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	913 B
		mm	green / white	2.245 – 2.251	914 B
Perm. crankshaft bearing clearance			0.014 – 0.043

Engine			Y 26 SE, Y 32 SE

Crankshaft bearing			Lower crankshaft bearing shell
1			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 – 1.995	225 N
		mm	green	1.995 – 2.001	226 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	227 N
		mm	green / blue	2.120 – 2.126	228 N
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	229 B
		mm	green / white	2.245 – 2.251	230 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 – 1.995	595 N
		mm	green	1.995 – 2.001	596 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.001	597 A
		mm	green / blue	2.120 – 2.126	598 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	202 B
		mm	green / white	2.245 – 2.251	203 B
Perm. crankshaft bearing clearance			0.014 – 0.043

Engine			Y 26 SE, Y 32 SE

Crankshaft bearing			Lower crankshaft bearing shell
2, 3			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 – 1.995	948 N
		mm	green	1.995 – 2.001	949 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	950 N
		mm	green / blue	2.120 – 2.126	951 N
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	952 B
		mm	green / white	2.245 – 2.251	953 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 – 1.995	942 N
		mm	green	1.995 – 2.001	943 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.001	944 A
		mm	green / blue	2.120 – 2.126	945 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	946 B
		mm	green / white	2.245 – 2.251	947 B
Perm. crankshaft bearing clearance			0.014 – 0.043

Engine			X 25 XE, X 30 XE

Crankshaft bearing 4			Lower crankshaft bearing shell
(guide bearing)			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 – 1995	685 N
		mm	green	1.995 – 2.001	686 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	007 A
		mm	green / blue	2.120 – 2.126	008 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	009 B
		mm	green / white	2.245 – 2.251	010 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 – 1.995	685 N
		mm	green	1.995 – 2.001	686 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	007 A
		mm	green / blue	2.120 – 2.126	008 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	009 B
		mm	green / white	2.245 – 2.251	010 B

Engine			Y 26 SE, Y 32 SE

Crankshaft bearing 4			Lower crankshaft bearing shell
(guide bearing)			Colour code	Thickness	Identification GM 15
	Standard size	mm	brown	1.989 – 1.995	268 N
		mm	green	1.995 – 2.001	269 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	270 A
		mm	green / blue	2.120 – 2.126	271 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	272 B
		mm	green / white	2.245 – 2.251	273 B
			Upper crankshaft bearing shell
	Standard size	mm	brown	1.989 – 1.995	459 N
		mm	green	1.995 – 2.001	460 N
	Undersize (0.25)	mm	brown / blue	2.114 – 2.120	461 A
		mm	green / blue	2.120 – 2.126	462 A
	Undersize (0.50)	mm	brown / white	2.239 – 2.245	204 B
		mm	green / white	2.245 – 2.251	205 B

Engine			X 25 XE, Y 26 SE, X 30 XE, Y 32 SE

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

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

Engine				X 25 XE	X 30 XE

Ø Cylinder bore
	Standard size
		Coefficient 8	mm	81.575 – 81.585	85.975 – 85.985
		Coefficient 99	mm	81.585 – 81.595	85.985 – 85.995
		Coefficient 00	mm	81.595 – 81.605	85.995 – 86.005
		Coefficient 01	mm	81.605 – 81.615	86.005 – 86.015
		Coefficient 02	mm	81.615 – 81.625	86.015 – 86.025
	Oversize 1)
		Index 7 + 0.5	mm	82.065 – 82.075	86.465 – 86.475
Ø Piston
	Standard size
		Coefficient 8	mm	81.540 – 81.550	85.940 – 85.950
		Coefficient 99	mm	81.550 – 81.560	85.950 – 85.960
		Coefficient 00	mm	81.560 – 81.570	85.960 – 85.970
		Coefficient 01	mm	81.570 – 81.580	85.970 – 85.980
		Coefficient 02	mm	81.580 – 81.590	85.980 – 85.990
	Oversize
		Index 7 + 0.5	mm	82.030 – 82.040	86.430 – 86.440
Piston clearance			mm	0.025 – 0.045
Piston projection			mm	0.45	1.40

Engine				Y 26 SE	Y 32 SE

Ø Cylinder bore
	Standard size
		Coefficient 8	mm	83.175 – 83.185	87.475 – 87.485
		Coefficient 99	mm	83.185 – 83.195	87.485 – 87.495
		Coefficient 00	mm	83.195 – 83.205	87.495 – 87.505
		Coefficient 01	mm	82.205 – 83.215	87.505 – 87.515
		Coefficient 02	mm	83.215 – 83.225	87.515 – 87.525
	Oversize 1)
		Index 7 + 0.5	mm	83.665 – 83.675	87.965 – 87.975
		Index 8 + 0.5	mm	83.675 – 83.685	87.975 – 87.985
		Index 9 + 0.5	mm	83.685 – 83.695	87985 – 87.995
		Index 0 + 0.5	mm	83.695 – 83.705	87.995 – 88.005
Ø Piston
	Standard size
		Coefficient 8	mm	83.140 – 83.150	87.440 – 87.450
		Coefficient 99	mm	83.150 – 83.160	87.450 – 87.460
		Coefficient 00	mm	83.160 – 83.170	87.460 – 87.470
		Coefficient 01	mm	83.170 – 83.180	87.470 – 87.480
		Coefficient 02	mm	83.180 – 83.190	87.480 – 87.490
	Oversize
		Index 7 + 0.5	mm	83.630 – 83.640	87.930 – 87.940
		Index 8 + 0.5	mm	83.640 – 83.650	87.940 – 87.950
		Index 9 + 0.5	mm	83.650 – 83.660	87.950 – 87.960
		Index 0 + 0.5	mm	83.660 – 83.670	87.960 – 87.970
Piston clearance			mm	0.025 – 0.045
Piston projection			mm

Engine				X 25 XE, X 30 XE	Y 26 SE	Y 32 SE

Piston rings
	Rectangular compression ring
		Height	mm	1.5
		Gap	mm	0.30 – 0.50
		Vertical play	mm	0.02 – 0.04
	Tapered compression ring
		Height	mm	1.5
		Gap	mm	0.30 – 0.50
		Vertical play	mm	0.02 – 0.04
	Oil scraper ring
		Height	mm	3.0
		Gap	mm	0.4 – 1.4
		Vertical play	mm	0.01 – 0.03
Ring gap distribution 2)			°	120		120

Engine				X 25 XE	X 30 XE

Piston pin
	Length		mm	55.7 – 56.0	57.7 – 58.0
	Diameter		mm	20.99 – 21.00
	Bearing			In con-rod	floating
				shrunk fit
	Clearance
		in piston	mm	0.011 – 0.014	0.001 – 0.015
		in con-rod	mm	0	0.014 – 0.030

Engine				Y 26 SE, Y 32 SE

Piston pin
	Length		mm	57.7 – 58.0
	Diameter		mm	20.99 – 21.00
	Bearing		mm	floating
	Clearance
		in piston	mm
		in con-rod	mm

1 ) After re-boring, the old index must be invalidated and the new oversizing index must be embossed.
2 ) Arrange gap of upper oil scraper ring 25 to 50 mm offset to the left and gap of the lower ring 25 to 50 mm offset to the right relative to the gap of the lower intermediate ring.

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J Engine and Engine Aggregates
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Torque guideline values - DOHC II (DOHC Engine) > < V6 DOHC Petrol Engines X 25 XE, Y 26 SE, X 30 XE, Y 32 SE - Engine Identification/Engine Number

Vauxhall Workshop Service and Repair Manuals

Omega B

J Engine and Engine Aggregates DOHC Petrol Engine Cylinder Block Specifications Crank Drive, Cylinder Block - V6 Block - V6

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J Engine and Engine Aggregates
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