How to check the timing of the camshafts?
1 Checking camshaft timing 4.1.1 Camshaft position Turn the crankshaft, in normal direction of engine rotation, to TDC No.1 cylinder (ignition), using a wrench on the crankshaft pulley centre bolt. Check the timing positions of the camshafts – each camshaft has a rectangular section at the rear which has a curved edge on top
Where is the camshaft setting plate located on a petrol engine?
Place VS4805-1 Camshaft Setting Plate onto the rectangular section at the rear of the INLETcamshaft, ensuring that the curved edge of the rectangular plate is uppermost. Align the camshaft so the Setting Plate rests fullyon the surface of the cylinder head (Fig.7). NOTE:Do not insert fixing bolts at this stage.
Where to place vs4805-1 camshaft setting Plate?
Place VS4805-1 Camshaft Setting Plate on to the rectangular section at the rear of the INLETcamshaft, and ensure the Plate rests fullyon the surface of the cylinder head (do not insert fixing bolts). If timing is correct, VS4805-1 Plate should rest on the cylinder head without any gap, or at most, raised 0.5mm on the inlet side only (Fig.7).
Which is the correct position for the exhaust camshaft?
An additional guide to correct camshaft position, using the exhaust camshaft, is that in the correct TDC engine timing position, the recesses in the sections of the exhaust camshaft between the lobes, will be pointing towards the exhaust manifold (Fig.3).
How much torque does a SR20 camshaft have?
Evenly tighten 1/2 turn on each bolt until all of the caps are snug (1.4 ft -lb and again to 4.3 ft -lb). Then final torque the bolts from the center bolts out ward to 6.7 to 8.7 ft -lb for all of the bolts with a 10 M.M. head. The 2 larger bolts (12M.M. head) closest the distributor are torqued to 13 to 19 ft-lb. 10.
How do you attach a sprocket to a cam?
Attach the sprockets to the new cams and screw the bolts in by hand. If you have positioned the cams dowels correctly, only a slight rotation of the cams will be needed to engage the dowel and sprocket. Check to see that the spro cket is fully seated against the cam before torquing the bolt tight.
How do you remove bearing caps on a camshaft?
Evenly remove the bearing caps one turn of each bolt at a time until all are free of tension. Re- move the bearing caps and place them in a clean area in the same order they are removed.
1 Checking camshaft timing 4.1.1 Camshaft position Turn the crankshaft, in normal direction of engine rotation, to TDC No.1 cylinder (ignition), using a wrench on the crankshaft pulley centre bolt. Check the timing positions of the camshafts – each camshaft has a rectangular section at the rear which has a curved edge on top
How does the Valvetronic layout of a camshaft work?
The Valvetronic layout incorporates a conventional inlet camshaft and a secondary eccentric shaft, with intermediate levers and followers, activated by a stepper motor. The stepper motor changes the phases of the eccentric shaft, altering the action of the inlet valves. All these are housed in a camshaft carrier bracket in the cylinder head.
How does advancing or retarding a camshaft work?
Advancing or retarding the cam pushes the centerline of the camshaft to one side or the other of the crankshaft centerline. This changes the Timing of the valve opening and closing events, in relation to the position of the piston in the cylinder. How is it measured? Find the lobe centerline in relation to the piston’s position in the cylinder.
How do you set the camshafts in a car?
Turn the crankshaft, in normal direction of engine rotation, to TDC No.1 cylinder (ignition), using a wrench on the crankshaft pulley centre bolt. Check the timing positions of the camshafts – each camshaft has a rectangular section at the rear which has a curved edge on top and a straight edge on the bottom.