K7J engine (lengthwise cut): 1 - crankshaft; 2 - cover of the main bearing of the crankshaft; 3 - an asterisk of a chain of a drive of the oil pump; 4 - auxiliary drive belt pulley; 5 - toothed pulley of the crankshaft; b - front crankshaft oil seal; 7 - water pump; 8 - toothed pulley of the water pump; 9 - timing belt cover; 10 - a gear pulley of a camshaft; And - an epiploon of a camshaft; 12 - cylinder head cover; 13 - axis of the rocker arms of the valve drive; 14 - camshaft; 15 - cylinder head; 16 - cylinder block; 17 - flywheel; 18 - rear crankshaft oil seal; 19 - oil sump; 20 - connecting rod bearing shell; 21 - main bearing shell; 22 - oil pump inlet pipe
K7J engine (cross section): 1 - connecting rod cover; 2 - connecting rod; 3 - piston pin; 4 - piston; 5 - inlet pipe; b - camshaft; 7 - inlet valve; 8 - inlet valve rocker; 9 - adjusting bolt; 10 - adjusting bolt locknut; 11 - axis of the rocker arms of the valve drive; 12 - exhaust valve rocker; 13 - valve spring plate; 14 - valve spring; 15 - valve guide sleeve; 16 - exhaust valve; 17 - crankshaft; 18 - flywheel; 19 - oil sump
General characteristics
- Engine - K7J 700
- Engine displacement - 1390 cm33
- Cylinder diameter - 79.5 mm
- Piston stroke - 70 mm
- Compression ratio - 9.5 / 1
- The order of operation of the cylinders is 1-3-4-2
Engine Wash Precautions
Protect the camshaft and alternator drive belts from water and detergents. Do not allow water to enter the air intake ducts.
Repair of threaded holes
Threaded holes in all parts of the engine can be repaired by using spiral inserts with appropriate threads.
Tightening torques
Sectional view and tightening torques for threaded connections. (1) - Threads and contact surfaces under the bolt heads lubricated with engine oil, (2) - Pre-tightening up to 20 Nm, followed by additional rotation by an angle of 68±6°, (3) - Bolt and nut M6, (tightening torque 10 Nm), M8 bolt (tightening torque 22 Nm), (4) - Tightening torque for the camshaft drive belt tensioner nut 50 Nm, (5) - Before tightening, lubricate the threads of the bolt and the surface under its head with engine oil.
Sectional view and tightening torques for threaded connections. (1) - Pre-tighten to 10 Nm, then tighten to 43 Nm.
Sectional view and tightening torques for threaded connections. (1) - See the tightening of the cylinder head bolts, subsection "Installing the cylinder head", (2) - Pre-tighten the bolts with a torque of 25 Nm, then tighten by an angle of 47±5°.
Parts that cannot be reused
1. All seals and gaskets.
2. Flywheel mounting bolts.
3. Valve guides.
4. Bolts of fastening of a head of the block of cylinders.
5. Bolts of covers of main bearings of a cranked shaft.
The main difference between the K4J engine and the K7J engine - the presence of two camshafts (separate intake and exhaust valves) in the cylinder head. The camshafts are driven by a reinforced toothed belt. Sixteen engine valves are actuated by camshafts using roller rockers (rockers). Hydraulic compensators automatically ensure backlash-free contact of the camshaft lobe with the valve. Cylinder block, crankshaft. flywheel, pistons, piston pins, connecting rods of both engines are identical. Lubrication, cooling, power systems are also the same in design.