Crankshaft (Hyundai Elantra J2)

Removal

1. Remove the timing belt, front cover, wheel, cylinder head and oil pan. For details, please refer to the relevant sections.

2. Remove the rear plate and rear oil seal.

3. Remove the lower connecting rod head caps.

Note: Mark the crankshaft main bearing caps to ensure they are installed in their correct positions.

4. Remove the main bearing caps and crankshaft. Arrange the liners according to the bearing cap numbers.

5. Remove the crankshaft position sensor wheel.

Examination

Crankshaft

1. Check the crankshaft main and connecting rod journals for damage, uneven wear and cracks. Also check that all holes are not clogged.

Repair or replace all defective parts.

2. Check the crankshaft main and connecting rod journals for roundness and taper.

(Standard size)

• Crankshaft journal outer diameter - 57 mm
• The outer diameter of the crank pin is 45 mm
• Roundness and taper of main and connecting rod journals of the crankshaft - 0.01 mm

Main and connecting rod bearings

Visually inspect each bearing for delamination, melted areas, scoring, and improper contacts. Replace defective liners.

Measuring oil clearances

Check the oil clearances by measuring the outside diameter of the crankshaft main and connecting rod journals and the inside diameter of the bearings. The gap size is obtained by determining the difference between the measured internal and external diameters.

Standard value

Oil clearance

• Crankshaft main bearing - 0.028-0.048 mm
• Crankshaft connecting rod bearing - 0.024-0.044 mm
• Limit - 0.1 mm

Measuring oil clearances (Method of using a plastic template)

A plastic template can be used to measure gaps.

1. Remove oil, dirt and grease from the bearings and crankshaft journals.

2. Cut a piece of plastic template to a length equal to the width of the bearing and place it along the axis of the journal away from the lubrication holes.



3. Install the bearing shells and caps and tighten them to the specified torque. Do not turn the crankshaft while performing this operation. Remove the bearing caps. Using the scale printed on the template packaging, measure the width of the plastic template at its widest point. If the gap exceeds the permissible value, the liner must be replaced or a smaller liner must be used. When installing a new crankshaft, use the correct size bearings. If the clearance is not equal to the standard value even after replacing the bearing, the journals can be ground to the recommended reduced size and bearings of the same size can be used.





Check the front and rear seals for damage and rib wear. Replace the defective seal.

Bearing cap

After installing the bearing caps, check that the crankshaft rotates smoothly and that the end play is within specification. If the axial play is greater than the limit value, replace the crankshaft bearings.

• Standard value is 0.05-0.18 mm
• Limit - 0.25 mm

Leading disk

Replace warped, damaged or cracked drive disc.

Crankshaft Position Sensor Wheel

1. Remove the sensor wheel.

2. Check the sensor wheel for damage, cracks and wear. Replace if necessary.

3. Check the clearance between the sensor wheel and the crank position sensor using a depth gauge.

The gap between the sensor wheel and the crank position sensor is 0.5-1.1 mm

Note:

• 1. Measure the depth from the top tooth of the sensor wheel to the outer surface of the drive axle housing in the block with the gearbox.
• 2. Determine the difference between the length of the probe and the depth.
• 3. The length of the sensor is the distance between the end of the sensor and the inner point on the contact surface.

Installation

1. Install the upper main bearing into the cylinder block. When reusing the main bearing, make marks on it during disassembly to facilitate its reinstallation.

2. Install the crankshaft. Apply engine oil to the journals.

3. Install the bearing caps and tighten the bolts to the specified torque in the following sequence: center, #2, #4 front and rear caps. The cover bolts must be tightened evenly in 2-3 steps until the required torque is reached. The covers must be installed with the arrows pointing towards the front of the engine. Make sure that the caps are positioned correctly according to their numbers.

Tightening torque

• Main bearing cap bolt - 27-33 Nm + (60° ~ 65°)
• Connecting rod cap bolt - 50-53 Nm

4. Make sure the crankshaft rotates freely and has proper end play when moved back and forth.

Crankshaft axial clearance - 0.06-0.26 mm

5. Install the crankshaft rear bearing seal. Use the special tool to install the crankshaft rear bearing seal (09231-11000). Press the seal in carefully so that it does not move.

6. Install the rear cuff housing and gasket. Tighten the five bolts. Apply engine oil to the seal lips and to the crankshaft during installation.