3.4.7. Head of cylinders and valves


1. Remove a head of cylinders. In engines of 2,0 (DOHC), 2,5 and 3,0 liters remove camshafts and pushers.
2. Squeeze in turn a spring of each of valves the special tool and remove conical plugs. Remove plates of springs and a spring.
3. By means of flat-nose pliers remove epiploons of rods of valves and remove saddles of springs.
4. Remove valves. Put valves and details corresponding to them in the separate numbered bags.

Carefully clean a head of cylinders and a detail of valves.


1. Clean off the remains of old laying from a head surface.
2. Clean off a deposit from the surfaces of combustion chambers and wash out a head solvent. Clean valves.
3. Clean internal channels of a head.



1. Attentively examine a head on existence of cracks and other damages. At detection of cracks, the head needs to be replaced.
2. By means of a ruler and the probe check deformation of a surface of a head, if necessary the head needs to be processed on the machine. For this purpose address experts.
3. Examine saddles of valves in combustion chambers. If they cracked or burned, they need to be replaced. For this purpose address the expert. If saddles are only slightly scratched, they and heads of valves are enough to be processed abrasive structure.
4. If the directing plugs of valves are worn-out, they need to be replaced. Measure diameters of rods of valves and internal diameters of the directing plugs. Calculate a gap and compare the received size to technical requirements. If the gap exceeds admissible limits, replace plugs or valves. For this purpose address the expert.


1. Examine heads and saddles of valves on existence of wear, scratches and cracks. Check that the rod of the valve was not bent. At detection of strong wear valves need to be replaced.
2. Measure diameters of rods of valves in several places if the received results strongly differ from each other, it means that the rod is worn-out and the valve needs to be replaced.
3. If heads and saddles slightly burned, they can be ground special abrasive paste. To reach full tightness between the valve and its saddle, it is necessary to grind the adjoining surfaces of the valve and a saddle. Apply special abrasive paste on a valve head, insert it on the place and by means of the special tool turn in the parties.


1. Examine springs of valves on existence of damages and compare their length to length of new springs. If necessary replace springs.
2. Check that springs were straight lines.


1. Grease rods of valves and insert valves on places.
2. Establish a spring saddle.
3. Install the protective plug of an epiploon.
4. Establish a valve rod epiploon.
5. Hammer an epiploon into place.
6. Establish springs and plates of springs.
7. Squeeze springs and install conical plugs.
8. Establish a head of cylinders.