Removal of a cranked shaft is possible only from the engine taken out from the car. Assumes Flywheel/Drive Disc, Crankshaft Pulley, Timing Belt/Chains with Timing/Sprockets, Sump, Oil Pickup, Oil Pump, Main Bearing Cap Bridge (depending on configuration) and connecting rod and piston groups have already been dismantled (see Procedures for repairing SOHC gasoline engines without removing them from the vehicle, In-Vehicle DOHC Gasoline Engine Repair Procedures or Repair procedures for diesel engines 1.7 l and 2.0 l without removing them from the car, And Removal of connecting rod and piston assemblies).
1. Before proceeding with the extraction of the crankshaft from the engine, measure the value of its axial play. Fix the dial-type gauge on the block coaxially to the crankshaft, resting its plunger against the cheek of one of the cranks or against the end of the shaft trunnion.
2. Push the crankshaft all the way back and reset the instrument indicator. Now push the shaft in the opposite direction and read the meter reading. The value of the shaft free play in the longitudinal direction is its axial play. Compare the measurement result with the requirements (see Specifications). If the backlash exceeds the maximum allowable value, check the thrust surfaces of the shaft for signs of excessive wear. If there are no obvious signs of wear, installing new thrust washers usually corrects the situation.
3. If you do not have a dial gauge on hand, you can use a conventional blade-type probe. Carefully slide the shaft forward along the engine as far as it will go, then determine the amount of the resulting gap between the crank web and the semi-ring of the thrust combined bearing of the second (diesel engines 1.7 l DOHC) / third (all other engines) main bearing, tightly fitting a blade of appropriate thickness into it (I) probe.
4. In a diagonal order, in several steps (1/4 turn per approach) Loosen the main bearing cap bolts enough to allow them to be turned out by hand. Mark the crankshaft main bearing caps with an identification mark as needed (use a punch or marker).
On most engines, all bearing caps are marked in production from 1 to 5 in ascending order from the timing drive side.
On 2.0 liter diesel engines, only the covers of the 1st and 2nd main bearings are equipped with factory markings.
5. Gently tap the bearing caps with a soft-faced hammer and remove them from the engine block. If necessary, use the bolts as levers. Make sure that when removing the covers, the main bearing shells inserted in them are not lost.
6. Carefully remove the crankshaft from the engine - due to the significant weight of the assembly, it would be wise to enlist the help of an assistant. Make sure that the main bearing shells remain in their beds in the block and covers. Install the covers in their regular places on the block, and hand-tighten the mounting bolts.
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