Jeep Grand Cherokee

Uncover heads of cylinders (Has undressed Removal and installation of a cover of a head of cylinders). Unscrew a cylinder spark plug in which there are defective components. If there is a necessity for replacement маслоотражательных caps of cores of all valves, remove all candles. Turn a cranked shaft so that the piston of the corresponding cylinder has appeared in ВМТ the end of a step of compression (see Has undressed Reduction in position ВМТ of a step of compression of the piston of the first cylinder). If to replacement are subject маслоотражательные caps of cores of all valves, begin with the cylinder № 1 and serve valves of each of cylinders serially. From the cylinder to the cylinder pass as ignition (Specifications see). Screw an adapter in a candle aperture and connect to it a hose from a source of compressed air. Demanded type the adapter can be found in any of shops of automobile accessories.

Remove bolts, spherical support and коромысла valves of the cylinder with defective components, then take bars of pushers. If it is necessary to replace маслоотражательные caps of all valves, it is necessary to remove all коромысла and bars of all pushers (Has undressed Removal, check of a condition and installation коромысел and bars of pushers). Submit to the cylinder the compressed air.

Valves should be kept now by pressure of air. If working surfaces of valves and a facet of their saddles appear considerably worn out, air leaks can lead to impossibility of keeping of valves in the closed condition - in this case it is necessary to resort to an alternative method. If access to a source of compressed air is absent, or deterioration of valves and their saddles does not allow to take advantage of it, it is necessary to resort to an alternative method of keeping of valves. Result the piston in position approximately 45 before ВМТ a compression step, then fill a piece of a nylon cord through a candle aperture in the combustion chamber, completely having filled it with it. Take care of that from a candle aperture remained to stick out the end of a cord of sufficient length for its subsequent extraction. The big face head with a collar rotate a cranked shaft in a normal direction till the moment of occurrence of easy resistance проворачиванию. Stop up with aperture rags in a head of cylinders near to valves in order to avoid falling in the engine of details and tools, then the special tool compress клапанную a spring. By means of small nippers or a magnet take crackers of the cutting lock.

Remove a plate or a rotary support of a spring, the plug (it is used on some types of valves) and assemblage клапанной springs, then remove маслоотражательный a cap of the directing plug

Valve components (models of last years of release have insignificant difference)

Put on the end of a core of the valve a rubber bandage or wrap up its adhesive tape for the purpose of prevention of casual falling of the valve in the combustion chamber, then block air giving.

Check up a valve core on presence of damages. Повращайте the valve in the directing plug, trying to reveal presence эксцентриситета an end face of the core which is a sign of a bend of the valve. Move the valve upwards-downwards in the plug. Presence of points of jamming speaks about a bend of a core or damage of the directing plug. In both cases the head should be removed from the engine for repair carrying out. Again submit air to the cylinder for valve keeping in the closed position, then remove an adhesive tape or a rubber bandage from a core. If the nylon cord is applied to valve keeping, turn a cranked shaft in a normal direction till the moment of occurrence of easy resistance to rotation. Grease a valve core with impellent oil, and its end face - assembly impellent greasing and establish new маслоотражательный a cap of the directing plug, freely pulling its core of the valve before full landing to a plug ledge.

Establish on the valve a spring. Establish a plate клапанной springs (or a rotary support). Compress a spring and establish crackers of the cutting lock in a flute on a valve core. For keeping of crackers in a flute to отпускания the tool compressing a spring, put on their internal walls a little dense greasing. Release the tool compressing a spring and make sure of correctness of landing of crackers. Disconnect an air hose and turn out an adapter from a candle aperture. If the cord was applied, take it from the cylinder. Establish to the place of the Bar of pushers, коромысла, spherical support and roadways скобы (Has undressed Removal, check of a condition and installation коромысел and bars of pushers). Screw a candle () ignitions and connect a candle wire () (the Head of Adjustment and routine maintenance). Establish into place a cover of a head of cylinders (Has undressed Removal and installation of a cover of a head of cylinders). Start the engine and check up it on leaks of oil and presence of the extraneous sounds proceeding from under a cover of a head.