Twin-Cam Locking Tools. These tools enable the camshafts to be locked in relationship to each other be-
cause the pressure of the compressed valve springs can cause the position to change after the timing belt has
been removed.
Changing the timing belt is made easier by locking the camshafts in position and reduces the risk of damage.
Damage will occur to the valves if they make contact with the piston after the correct timing position of the cam-
shafts is lost.
Engine Timing – Astra, Astravan, Zafira, Vectra, Omega, Sintra, Frontera with X20DTL / X20DTH / X22DTH 2,0 & 2,2
Eco Tec Diesel Engines
The correct engine timing position is achieved when the first cylinder is at TDC and each of the timing tools can be correctly fitted.
1/. The camshaft is positioned horizontally with the location hole at the top. Use the camshaft setting tool (T) to align the camshaft (see Fig.
2/. The Injection Pump Setting Pin (R) aligns to a timing mark on the sprocket and is fitted through a recess in the injection pump flange and into the
retaining hole. (see Fig.
)
3/. The crankshaft locking pin is used to set the crankshaft at TDC position. This tool is fitted through the crankshaft pulse pick-up opening in the en-
gine block and locates into a slot in the crankshaft. (see Fig.
4/. Fuel Pump Sprocket Timing Tool (P+Q) enables the correct timing position through action to the simplex chain and camshaft sprocket. First attach
the special wrench vertically to the sprocket, then attach the bracket assembly to the cylinder head. Using a _" Sq.Dr. wrench to apply light pressure to
turn the camshaft in an anti-clockwise (contra-engine rotation). The screw is the turned to contact the special wrench and retain this position.
5/. At this stage the Pump Locking Pin (R) should be free to be removed and re-fitted. If this pin is tight, adjust the screw until the pin is easy to move.
The camshaft sprocket bolt can now be tightened and refit the simplex chain tensioner.
Fig.6
Engine Timing – Corsa, Agila with X10XE 1,0 12v Eco Tec / X12XE 1,2 16v Eco Tec engines
(GB) The correct engine timing position is achieved when the first cylinder is at TDC and each of the timing tools can be correctly fitted.
1/. Camshaft Setting Plate is used to correctly position both camshafts, and fits into the slots of each camshaft to align horizontally in relation to the
top surface of the cylinder head.
2/. The crankshaft locking pin which positions the crankshaft at TDC is inserted through the engine block and locates into a slot located on the first
crank web of the crankshaft.
3/. The Timing Disc Position Gauge is connected to the inlet camshaft sprocket to achieve the correct timing position of the camshaft and the sensor
disc.
4/. Tensioner retaining pins are used to retain the hydraulic activated tensioner rail which must be moved from contact with the simplex chain during
the work of belt replacement.
(GB) The correct engine timing position is achieved when the first cylinder is at TDC and each of the timing tools can be correctly fitted.
1/. Camshaft Setting Plate is used to correctly position both camshafts, and fits into the slots of each camshaft to align horizontally in relation to the
top surface of the cylinder head.
2/. The crankshaft locking pin which positions the crankshaft at TDC is inserted through the engine block and locates into a slot located on the first
crank web of the crankshaft.
3/. The Timing Disc Position Gauge is connected to the inlet camshaft sprocket to achieve the correct timing position of the camshaft and the sensor
disc.
4/. Tensioner retaining pins are used to retain the hydraulic activated tensioner rail which must be moved from contact with the simplex chain during
the work of belt replacement.
Fig.7
)
T
Fig.5
)
P+Q
