If the cylinder head needs to be replaced, remove all studs using two nuts locked together. Place an open-end wrench on the bottom nut and remove the studs. The new cylinder head is supplied complete with valves.
To disassemble the cylinder head, you must do the following:
- unscrew the intake manifold (eight screws, two nuts), unscrew the camshaft position sensor and the engine eye;
Fig. 72. Fastening the housing (1) of the thermostat and ignition coil with the holder (2)
- unscrew the thermostat housing 1 (Fig. 72), remove the sealing ring and unscrew the ignition coil 2 together with the fastener.
When removing the valves, proceed as follows:
- to avoid damaging the valves, the cylinder head should be placed on two wooden blocks in front and behind. Otherwise, you can use a special bracket and screw it onto the intake manifold studs. After that, clamp the bracket in a vice;
Fig. 73. Valve removal and installation tool
- compress the valve springs one by one with a valve puller (Fig. 73). A universal valve puller will also work;
- after the spring is sufficiently compressed, both valve crackers will come out from the top - they can be removed. Slowly unscrew the tool and remove the spring plate and valve spring. Using needle-nose pliers or a screwdriver, you can remove the lower spring plate with the valve stem sealing ring located there. The valve must be securely locked on the other side by placing a wooden block underneath. If you do not have a valve puller, put a piece of pipe of a suitable diameter on the valve spring plate and tap the pipe with a hammer. This will cause the valve crackers to pop out and remain in the inner cavity of the pipe. After removal, place the valves together (in the holes in the cardboard sheet with a number in front of each valve).