Figure 67. Front of the cylinder block: 1 - spring tension pin; 2 - chain guide support pin; 3 - steel ball with a diameter of 17 mm; 4 - oil spray nozzle; 5 — cylinder block plug; 6 — chain tensioner shoe support pin; 7 — support pin of the oil pump drive chain tensioner
Figure 66. Rear of the cylinder block showing the location of the steel ball (1) blocking the main oil line and the cylinder block plug (2)
On the sides and ends of the cylinder block there are plugs for the holes, which are squeezed out of the block in the event of freezing of the coolant. On the side of the coolant drain plug on the cylinder block there are two plugs with a diameter of 34 mm, and on the opposite side (from the oil filter side) there are two more plugs of the same diameter. There is one plug 5 on the end side of the crankcase (see figure 67) diameter 17 mm. Another plug 2 (see figure 66) 34 mm in diameter, pressed into the front end of the cylinder block. These plugs can be replaced in case of freezing of the coolant without removing the engine, but using a special tool. To do this, you need to perform the following operations:
- drain the coolant;
- remove parts and components that may interfere with access to the plugs;
Figure 69. Installing a screwdriver or chisel to remove the cylinder block plugs
Figure 70. Removing the plug from the block
- place a narrow chisel or a powerful screwdriver under the edge of the plug (figure 69) and using a hammer, turn the plug in the hole 90° around its axis (figure 70);
- grab the plug with pipe pliers and pull it out of the cylinder block as shown in the figure 70;
- carefully clean the plug seat in the cylinder block. There should be no traces of grease left on the sealing surface;
- apply Loctite to the bore and insert the new plug using a special mandrel (specification number 102 589 00 15 00) or other suitable mandrel until it is flush with the cylinder block surface;
- install all removed parts in their places and after a 45-minute pause, pour coolant into the engine if it was not removed from the car;
- after this, start the engine and check it for leaks.
Original material on the website MERCEDESMAN.ru