Mercedes-Benz E-class W124 - Repair manual and operation

7.8.5. Cleaning and survey of a head of the block of cylinders

Check of planeness of a head of the block of cylinders

Measurement of a vystupaniye of the vortex camera from a head of the block of cylinders

Carefully examine a head of the block of cylinders on existence of cracks and other damages. In the presence of cracks the head is subject to replacement.

Using a metal ruler and the probe, check planeness of the interfaced surface of a head of the block of cylinders. At not planeness of more than 0,1 mm it is necessary to pereshlifovat a head, at the same time its height has to conform to requirements.

Check a condition of saddles of valves. If they are burned, worn-out or have defects, they need to be replaced. If wear of a saddle of the valve is insignificant, they need to be ground in. Check the directing plugs of valves for wear, inserting into them a core of the valve and moving it aside. Movement has to be insignificant. If movement is excessive, take the valve and measure diameter of a core of the valve. If necessary replace the valve. If the core of the valve is not worn-out, so the directing plug which needs to be replaced is worn-out. Replacement of the directing plugs of valves should be made at service station.

If saddles of valves have to be pereshlifovana, this operation needs to be executed after installation of new guides of valves.

On diesel engines examine vortex cameras on existence of damages and splits. Small cracks are admissible. Replacement of vortex cameras is necessary if they are strongly burned and deformed, or their landing in a head of the block of cylinders weakened. The expert has to make replacement of the vortex camera. Check a vystupaniye of the vortex camera from the block of cylinders. For check of a vystupaniye establish an arm with the indicator of hour type on the interfaced surface of a head of the block of cylinders. Establish a measuring tip of the indicator on a head surface. Install the indicator on 0, then move an indicator tip on the vortex camera. On a scale of the indicator read the size of a vystupaniye of the vortex camera. Similarly check a vystupaniye of other vortex cameras.