Vauxhall Workshop Service and Repair Manuals

X 12 XE DOHC 0 Petrol Engine  

The X 12 XE DOHC petrol engine is based on the X 10 XE DOHC petrol engine, familiar from the Corsa-B and described in the "New Technical Features, Model Year 97 1/2" brochure.  

The X 12 XE also belongs to the ECOTEC DOHC 0 engine series.  

The main difference between the two engines is the number of cylinders; the X 10 XE is a 3-cylinder engine while the X 12 XE is a 4-cylinder in-line engine.  

The following table lists the differences between the two engines.  

	X 10 XE	X 12 XE
Weight	approx. 82 kg	approx. 87 kg
Cylinder block	3-cylinder	4-cylinder
Crankshaft	Main and stroke bearing journals not hollow-cast	Main and stroke bearing journals hollow-cast
	6 counterweights	4 counterweights
	Guide bearing =	Guide bearing =
	main bearing no. 3	main bearing no. 4
	Pulse pick-up disc mounted on the 6th crank web	Pulse pick-up disc mounted on the 8th crank web
Stroke	78.6 mm	72.6 mm
Pistons	Rounded trough in piston head	Flat piston head

2.4   X 12 XE DOHC 0 Petrol Engine (continued)  

	X 10 XE	X 12 XE
Flywheel	Pot flywheel	Flat flywheel
	Weight: 9.5 kg	Weight: 7.4 kg
Cylinder head	12 valves	16 valves
Camshaft	4 bearings	5 bearings
Exhaust manifold	Single-flow	Dual-flow
Intake manifold	Aluminium	Plastic
Fuel system	Fuel feed and return lines with pressure regulator on fuel distributor pipe	Introduction of "non-return fuel system" - fuel return line no longer required. The pressure regulator is integrated into the in-tank module.