Some repairs require the engine to be installed in a certain position. There are 3 possibilities for this:
1. Raise the Renault 19, as when changing the front wheels, and lock, engage 5th gear and turn the front wheels that are out; their movement is transmitted to the engine.
2. Move the car in 5th gear slightly forward, making sure there is a straight section of road in front of the car.
3. Remove the spark plugs (incandescent) - the engine will be easier to turn - and rotate the V-belt pulley of the crankshaft or generator with the appropriate key. This method can be applied to Renault 19 with automatic transmission.
4. If the alternator V-belt pulley slips when turning it with a key, then press the V-belt so that it is tensioned and does not slip.
5. Under no circumstances should the engine be rotated by rotating the camshaft sprocket, as this stretches the toothed drive belt and may imperceptibly jump over the tooth on the camshaft sprocket.
Note. Recommendation: The motor may only be turned in the direction of rotation, i.e. clockwise. This applies to all Renault 19 engines.
Installing the piston of the 1st cylinder at TDC
To perform some engine and ignition repair work (Gas engine), as well as high pressure fuel pump (diesel) The piston of the 1st cylinder should be at top dead center (TDC). This means that it must be at the top of the working surface of the cylinder. In a four-stroke internal combustion engine, as well as in a diesel engine, the piston is at TDC twice during each of the 4 cycles. Firstly, when the working mixture is ignited and, secondly, after the exhaust gases are released and the injection of the working mixture or air begins after that (diesel). As a rule, in the TDC position, a spark is supplied to ignite the fuel, and on a diesel engine, fuel is injected into the swirl chamber.
So the marks on the timing belt cover and on the camshaft sprocket should match (the figure shows a car with a gasoline engine), so that cylinders 1 and 4 are at TDC. In this case, the piston of the 1st cylinder was in the position of the stroke stroke.
Engine type «WITH»
1. Remove the cover of the ignition distributor.
2. Turn the engine until the ignition distributor rotor is on the contact of the 1st cylinder.
3. Turn the engine a little more, if necessary, until the 0°mark in the viewing window of the gearbox housing matches the mark on the flywheel.
Engine type «F»
1. Turn the engine over until the flywheel mark lines up with the mark in the clutch housing bore.
2. Piston 1 and 4 are now at TDC.
3. Check up, whether both pushers of valves of 1st cylinder are unloaded. In addition, the corresponding camshaft cams must point upwards to the left and right. To do this, it is necessary to remove the cylinder block cover, how to do this is described in the section Checking and adjusting valve clearance this chapter.
4. If you did everything correctly, then the 1st cylinder is in the TDC position of the stroke.
5. If not, turn the engine clockwise and recheck the position of the camshaft.
Diesel
1. Engage 5th gear and push the vehicle until the mark on the toothed belt cover matches the mark on the timing belt sprocket of the camshaft drive.
2. Piston 1 and 4 are now at TDC, with piston 1 at TDC on the stroke.
3. For control: the cams of the 1st cylinder should look symmetrically from the left and right up. To do this, the cylinder head cover must be removed.