General information
Type - F9Q1
Working volume, cm³ — 1870
Cylinder diameter x piston stroke, mm — 80x93
Compression ratio - 19
Combustion chamber type - direct fuel injection
Camshaft arrangement - single overhead camshaft (SOHC)
Number of valves
- inlet - 4
- graduations - 4
Valve timing
- intake valves
- opening - 3° before TDC
- closing - 21° after TDC
- exhaust valves
- opening - 46° before BDC
- closing - 6° after TDC
Fuel system - fuel rail with pressure accumulator.
Basic data for adjustment and control
Valve clearance (cold engine), mm
- when checking
- intake valves - 0.15-0.25
- exhaust valves - 0.35-0.45
- when adjusting
- intake valves - 0.20
- exhaust valves - 0.40
Idle speed, min⁻¹ 825±25
Engine crankshaft speed at idle, min⁻¹ — 750 ±100
Compression (at 250-400 min 1), kPa — minimum 2000
Compression difference between cylinders, kPa — no more than 400
Timing belt oscillation frequency, Hz — 90±15
Sealant
Oil pan - MITSUBISHI GENUINE PART MD970389 or equivalent
Cylinder Head Cover - MITSUBISHI GENUINE PART MD970389
Flywheel mounting bolts - ЗМ stud locking 4170 or equivalent (aerosol)
General information
The four-cylinder diesel engine with direct fuel injection and high-pressure fuel rail is mounted transversely at the front of the vehicle. The cylinder block is made of cast iron, and the cylinder head is made of aluminum alloy. The timing mechanism is driven by a toothed belt from the crankshaft pulley.
The engine uses a cylinder block made of cast iron with cylinder liners machined directly into the cylinder block material.
As spare parts, the cylinder block is supplied with main bearing caps.
Marking and installation direction of main bearing caps: numbering from 2 to 5 (No. 2 on the flywheel side), and the marking should be read from the side opposite the location of the oil dipstick guide tube. Bearing support No.1 on the flywheel side has no marking.
The turbocharger is mounted under the exhaust manifold and is controlled by vacuum through a single solenoid valve controlled by the engine control unit.
The intercooler is installed at the front of the vehicle between the radiator of the cooling system and the condenser of the air conditioning system.
The high-pressure fuel distribution line is designed to store the fuel required for engine operation, reduce fuel pulsations and connect high-pressure elements. The steel, forged fuel distribution line is fixed to the cylinder head. The line contains a pressure sensor, a connection of the fuel return line with the fuel temperature sensor and a pressure regulator.
The engine with direct fuel injection and the Common Rail fuel distribution line is controlled by an electronic control unit.
The engine is removed upward from the engine compartment.
(The article was taken from the website: mitsubishiman)