Assembly
Notes: clean parts thoroughly before assembly; all contact surfaces must be coated with fresh engine oil; All gaskets and seals have been replaced with new ones.
1. Install valves.
A) Insert the valves into the holes in the block head bushings, making sure the valves are installed correctly.
b) Install the spring seat and new oil seal.
V) Install the valve spring and poppet (or rotary device).
1 - Valve plate (or rotary device),
2 - Rusks,
3; 7 - Spring,
4 - Oil deflector cap,
5 - Spring seat,
6 - Valve.
G) Using a spring compressor, install cotters on the valve stem.
d) Using a plastic-headed hammer, lightly tap the end of the valve stem to ensure that the nuts are securely seated.
2. Install the following parts:
A) Front and rear cylinder head flange.
b) Heater outlet.
V) Coolant outlet pipe.
1 - Coolant outlet pipe,
2 - Cylinder head,
3 - Outlet pipe of the heater,
4 - Front flange,
5 - Rear flange.
3. Assemble the intake and exhaust manifolds.
A) Lay the connector surfaces of the intake and exhaust manifolds against a flat plate.
b) Connect the intake manifold, heat insulator and exhaust manifold with four bolts.
- Tightening torque - 20 Nm
V) Check manifolds for warping (flatness) (see above).
4. Install intake and exhaust manifolds
- Tightening torque - 49 Nm
5. Install the carburetor.
Installation
1. Install the cylinder head.
A) Place a new gasket on the cylinder block, paying attention to the alignment marks.
b) Place the cylinder head on the gasket.
V) Lubricate the threads of the bolts and holes with engine oil.
G) Install and evenly tighten the 13 bolts in several passes in the sequence shown in the figure.
Tightening torques for bolts:
- with a socket head 14 mm - 88 Nm
- with a socket head 12 mm - 19 Nm
2. Install push rods and rocker assembly.
A) Make sure the push rods are properly installed.
b) Install the rocker arm assembly to the cylinder head.
Note: in the process of tightening the bolts and nuts, the rods should not move away from the rocker arms.
Install and evenly tighten two bolts and three nuts in several passes in the sequence shown.
- Tightening torque - 24 Nm
3. Install the cylinder head cover.
4. Install spacers and spark plugs.
- Tightening torque - 18 Nm
Final assembly
1. Install the vacuum tube with vacuum hoses on the cylinder head and carburetor.
2. Install heater tube bracket to exhaust manifold.
3. Connect the fuel hoses to the fuel pump and carburetor.
4. If AS system is available, install the AS vibration valve together with the air supply manifold on the cylinder head.
5. Fill in coolant.