4M40 Maintenance
The 4M40 engine is the 2.8L inline 4-cylinder turbo diesel by Mitsubishi. It was available for the entire production run of the MK2 with few modifications. The engine produces 123 horsepower at 4,000 rpm and 217 lb-ft torque at 2,000 rpm.
Table of Contents
Finding Parts
Many replacement parts are readily available for these cars. Below are some reference articles and reputable parts websites commonly used by the community.
Note that this list should not be considered exhaustive. If purchasing parts from an individual or community member, always use a payment platform that offers buyer protection, such as PayPal Goods and Services (NOT PayPal Friends and Family), so that you are protected if something happens.
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How To Find Parts For Your JDM Truck, Van, SUV, or Car
This is a reference article written by community member Andy Lilienthal.
- MegaZip
- Partsouq
- Amayama
- MitsubishiParts.com
- RockAuto
Fluids
| Fluid | Specification | Capacity (quarts) | Capacity (liters) | Part Links | Notes |
|---|---|---|---|---|---|
| Engine Oil | 15/40W Mineral (SAE) | 7.9 Quarts | 7.5 Liters | ||
| Transfer Case Oil | 75W-85W GL-4 Gear Oil | 3.0 Quarts | 2.8 Liters | ||
| Manual Transmission Oil | SAE 80/90W GL-4 Gear Oil | 3.4 Quarts | 3.2 Liters | ||
| Open Diff Fluid (front) | SAE 80/90W GL-5 Gear Oil | 1.3 Quarts | 1.2 Liters | ||
| Open Diff Fluid (rear) | SAE 80/90W GL-5 Gear Oil | 3.4 Quarts | 3.2 Liters | ||
| Limited Slip Diff Fluid (front) | LS 90 | 1.3 Quarts | 1.2 Liters | ||
| Limited Slip Diff Fluid (rear) | LS 90 | 3.4 Quarts | 3.2 Liters | ||
| Engine Coolant | Non-IAT, Non-OAT Coolant | 8.0 Quarts | 7.6 Liters | Do not use modern IAT or OAT coolants! Modern coolants contain acid (the A in IAT and OAT) which will destroy the soft copper metals in the cooling system of the 4M40! |
Filters
Belts
| Name | Manufacturer Part # | Quantity |
|---|---|---|
| Accessory Belt | 6219MC | 2 |
Hoses
| Name | Size (millimeters) | Length (inches) | Quantity |
|---|---|---|---|
| Soft Fuel Lines (at filter) | 8 mm | 12 inches | 2 |
Replacement Parts
| Name | Category | Manufacturer Part # | Alt. Part # | Notes |
|---|---|---|---|---|
| Radiator Cap | Cooling | MB660667 |
| Ensure the cap is rated for 0.9 bar. |