Every detail about the KE70 - KE75 - K2B

If you have questions about the KE70, KE75, K2B and other K2A engines, you’ve come to the right place!

Since we receive many requests regarding: We are happy to share information about the engines. The engines have been used in various machines and also in boats and mini tractors, for example.

! In this blog post we take a deep dive into the world of Mitsubishi’s reliable power stations. Whether you are a proud owner of a vintage Mitsubishi or are simply interested in the technical finesse of these engines, you have come to the right place.

For smooth operation and optimal performance, it is essential to pay attention to details such as torque , starter and alternator operation, and proper maintenance intervals . In this post we dive deep into the world of these engines, exploring not only the technical specifications but also sharing practical tips on maintenance intervals, using the right oil, and the crucial hours you need to spend taking care of your Mitsubishi engine.

Tightening torques

The tightening torques are as shown in the images;

Between 12-15 Kg*M.

Sequence of LOOSENING Cylinder head bolts KE70, KE75, K2A, K2B, K2C

Valve guide Technical data:

Sequence of mounting Cylinder head bolts KE70, KE75, K2A, K2B, K2C

Troubleshooting

1) Slow starting – Starting problems

Solutions regarding start slowly

Problem	Possible solution
Battery	Replace or charge battery
Ground cable	Check correct connection of ground cable
Starter motor	If there are abnormal sounds or no response: tap with a hammer (temporary solution, not long-term)

2) Engine not starting – Defective fuel system

Problem	Possible solution
Air in fuel system/lines	Remove air from the fuel system by bleeding air
Clogged fuel filter	Clean fuel filter or replace long-term fuel filter
Low fuel pump pressure	1. Check by loosening one of the pressure lines whether diesel comes out when starting. 2. Check that the plungers are not stuck. 3. Replace or overhaul the injection pump if none of the above helps
Incorrect nozzle image	Replace the nozzle/injector or use an injector cleaner
Filled up with petrol and/or bad diesel	Clean the fuel tank
Diesel bacteria or debris in the tank	Keep the tank at least 80% full and avoid moisture to prevent the growth of bacteria and debris. This applies to longer downtimes!
Fuel pump timing	Logically, time the engine and fuel pump

3) Low power – low compression

Problem	Possible solution
Low compression	1. Measure the compression ratio. 2. Replace worn piston rings
Valves	Check valve adjustment and replace valves if worn
Wrong mixture of air and fuel	Check fuel filter and air filter
Dirty tank	Clean the fuel tank
Overheating	1. Add cooling water if it is low. 2. Check the V-belt to ensure that the water pump rotates fully. 3. Flush a clogged radiator with vinegar
Head gasket	Check for overpressure in the cooling system and replace the head gasket if necessary

4) Oil consumption – leakage

Problem	Possible solution
Oil leakage	1. Leakage from seals: Replace the seals. 2. Leakage at connections: Tighten bolts if loose. 3. Oil Sump Plug leaking: Replace the copper washer or rubber seal. 4. Valve cover gasket leaking: Replace the gasket.
Negative pressure in engine	1. Incorrectly positioned piston rings, broken piston rings or wear: Check and replace if necessary. 2. Incorrect position of connecting rod or bearings: Check and correct if necessary. 3. Piston damage/wear or scratches in cylinder wall: Inspect with an endoscope through the injectors.
Oil visible from exhaust	1. Leakage at ‘stem seals’ valve stem seals: Replace the seals. 2. Valve or valve guide replacement: Replace damaged parts.

Cooling system – radiator – water pump

General scheme

Thermoswitch and its operation

The thermoswitch is located at the front and then the left side of the cylinder head. The switch turns on at 103, 108 or 111 degrees. This depends on the specifications of the engine. When the switch is turned on it obviously jumps
the red light on the dashboard is on. When the thermoswitch is switched on, the cooling system must be checked !