Mercedes-Benz | Piston replacement for excessive oil consumption on M156 (Part 2)

Model 164, 204, 209, 211, 212, 216, 219, 221, 230, 251, engine M156 More Information Tensioning strap 000 04 14 AR03.10-P-6111-02AMG Installation tool 111 589 08 43 01 AR05.20-P-6992AMG Special tools 156 589 00 61 00 1,4,Disconnect the removed piston|from the connecting rod.|| 5,7,Insert a suitable screwdriver|in the groove.|| 8,10,Pry out the piston pin locking element.||| 11,15,Press out the piston pin and|detach the connecting rod.|| 19,29,Note: |The piston rings of the new piston |are positioned at a 120° offset.| 36,47,Clamp the assembled piston|into the tensioning strap.|| 49,51,Turn the engine so that it is vertical.||| 52,56,This prevents scratches on the running |surface when the piston is inserted.|| 57,64,Note: |The arrow on the piston must point |towards the direction of travel.| 76,83,Move the piston into position by gently|knocking with a hammer handle.|| 84,86,Turn the engine again.||| 87,90,Coat the bearing shell in the connecting rod|bearing cap with some oil.|| 91,95,The arrows on the bearing caps always|point towards each other.|| 96,100,Use new bolts which have also being pre-oiled|when screwing in.|| 101,104,In the video, the procedure is only shown|on one piston.|| 105,113,When installing all pistons, observe the|7-stage tightening procedure for the |connecting rod bolts in the WIS document.| 115,119,Remove the radial shaft sealing ring|at the transmission end.|| 120,126,Clean sealant residue from the highlighted |surfaces with a suitable tool.|| 127,129,Degrease the surfaces.||| 131,136,Pick up the installation tool.||| 137,147,Tighten the first part with the bolts supplied.||| 149,152,Coat the sealing lip and outer flank of the|sealing ring with oil.|| 153,163,The oil is distributed on the inside through |turning, smoothen it out with your finger |on the outside.| 167,170,Slide the ring into position with the|second part of the tool.|| 171,174,The sealing ring then protrudes approx. 1 mm.||| 176,178,Remove the bridges again.||| 179,185,The lower section of the cylinder crankcase|must be cleaned and sealant must be applied.|| 187,191,Note: |Always replace the sealing rings!|| 192,194,Put the cap on.||| 195,197,Use a new, pre-oiled set of bolts.||| 198,200,Note: |The four front bolts are shorter.|| 201,209,When tightening, observe the tightening |procedure from inside to outside.|| 210,214,Reinstall the total of 23 outer bolts.||| 215,218,The engine supports and prefilled|oil pump follow next.|| 219,221,Ensure that the chain is seated correctly.||| 222,226,Observe the sealing path of the silicone bead|on the oil pan components.|| 227,234,Put the external oil pipes and drive plate|back in position.|| 235,239,Note: |Apply silicone at the transition of crankcase |and timing cover.| 240,244,Check the sealing surfaces on the cylinder |heads for cracks and irregularities.|| 245,247,Fix the bolts in place as per the tightening |procedure.|| 248,251,Use new and pre-oiled bolts.||| 252,254,Reinstall the slide rails and pins.||| 255,257,Install the guide pulley.||| 258,262,Install the chain tensioner and set engine to|40° after ignition TDC.|| 263,265,Insert the camshafts.||| 266,271,When tightening the bearing shells, |be very careful as with the removal.|| 272,276,Adjust the timing on the camshafts.||| 277,287,Adjust correctly using the special tool shown.||| 288,292,When everything is OK, insert the first|camshaft adjuster.|| 293,296,Note: |Insert a new diamond disk.|| 297,301,The bore with the safety screw|must be at the top.|| 302,312,Put the segmented disk on and|tighten the bolt finger-tight.|| 313,321,Remove the safety screw.||| 322,326,Note: |There is also a series of camshaft adjusters |without safety screws.| 327,329,In this case, a special tool is required.||| 330,336,Once the second camshaft adjuster |is installed, screw on the holding device.|| 338,348,Fit the attachment plate.||| 349,353,Tighten the mounting bolts to 115 Nm.||| 354,356,Remove the special tool.||| 357,363,Continue the installation|in reverse order.|| 364,373,Note: |When installing the intake manifold, |observe the tightening procedure shown.| 376,387,The engine is repaired with the last |detachable parts and can be reinstalled |in the vehicle.|