Mitsubishi Sigma 4G63 Sedan (1982-1984) (1982–1984)

The Mitsubishi Sigma Base offered New Zealand families a practical and economical mid-size car in the early 1980s. This guide provides essential information for owners looking to maintain and understand their Sigma, ensuring its continued reliability and longevity.

Parts for the Mitsubishi Sigma 4G63 Sedan (1982-1984)

• Gear Oil Gearbox (32)
• Radiator Coolant (15)
• Axle Gear Oil (11)
• Oil Filter (10)
• Spark Plug (9)
• Oil Seal Oil Pump (6)
• Spark Plug Tube Seal (6)
• Wheel Bearing (6)
• Radiator Cap (6)
• Water Pump (5)
• Oil Seal Crank Shaft Front / Timing Front (5)
• Timing Cover Gasket/Kit (4)
• Main Bearing Crank Shaft (4)
• Oil Seal Axle / Drive Shaft - Rear Outer (4)
• Suspension Bush Radius Arm Front (4)
• Fuel Filter (4)
• Brake Fluid (4)
• Valve Cover Bolt Seal/Washer (4)
• Oil Seal Crank Shaft Rear / Rear Main Bearing (3)
• Engine Mount Front (3)
• Steering Rack End (3)
• Oil Seal Camshaft (3)
• Universal Joint / Coupling Rear (3)
• Universal Joint / Coupling Front (3)
• Oil Seal Camshaft End (3)
• Wheel Bearing Kit/Hub Rear (3)
• Wheel Nut (3)
• Piston Ring (3)
• Ignition Module (3)
• Pitman Arm (3)
• Brake Pads Front (3)
• Valve Cover Gasket (3)
• Suspension Bush Rear Control Arm (3)
• Manifold Gasket Exhaust (3)
• Suspension Bush Rear Control Arm - Lower (3)
• Temperature Sensor / Sender Coolant (3)
• Timing Belt Camshaft (3)
• Tie Rod End (2)
• Shocks / Strut Rear (2)
• Ball Joint Front (2)
• Coil Spring Front Standard Profile (2)
• Suspension Bush Sway Bar Link (2)
• Coil Spring Rear Standard Profile (2)
• Steel Washer Sway Bar Link Front (2)
• Steering Box Seal Kit (2)
• Disc Brake Rotor Front (2)
• Brake Pads Rear (2)
• Timing Tensioner (2)
• Oil Pressure Switch/Sender (2)
• Cylinder Head Gasket (2)
• Head Set/Valve Regrind Gasket Set (2)
• Valve Stem Seal (2)
• Exhaust Flange Gasket Pipe (2)
• Conrod Bearing (2)
• Cylinder Head (2)
• Oil Seal Auxillary Shaft (2)
• Piston (2)
• Wheel Nut & Stud Rear (2)
• Wheel Bearing Front (2)
• Thermostat (2)

Known issues

Owners may encounter these common Mitsubishi Sigma Base issues:
• Automatic transmission problems (slipping, delayed engagement).
• Rust formation in wheel arches, underbody, and around window seals.
• Oil leaks from engine seals (crankshaft, camshaft, and valve cover).

WOF tips

When preparing your Mitsubishi Sigma Base for a Warrant of Fitness (WOF) inspection, pay close attention to these areas:
• Rust: Check carefully for rust, especially around the windscreen and rear window seals, as well as in the sills and floor pan. Rust in these areas can lead to a WOF failure.
• Steering: Excessive free play in the steering linkages is another common cause for WOF failure. Ensure all joints and connections are tight and in good condition.
• Underbody Corrosion: A thorough inspection of the vehicle's underbody, particularly chassis rails and suspension mounting points, is vital to identify potentially serious corrosion.

About the Mitsubishi Sigma 4G63 Sedan (1982-1984)

Owning a Mitsubishi Sigma Base in New Zealand comes with an understanding of its history as a dependable family vehicle. While known for its practicality, like any classic car, the Sigma requires diligent maintenance to keep it running at its best.

Maintenance & Care

Regular servicing is crucial. This includes checking and replacing filters (oil, air, and fuel) according to the service schedule. Maintaining the braking system - pads, rotors, and brake fluid - will ensure safe stopping power. Inspecting and maintaining the suspension components, ensuring responsive handling and a comfortable ride, is also key.

Known Weak Points:

Several areas require particular attention, especially given the age of these vehicles:
• Transmission Health: Automatic transmissions can be prone to failures around the 150,000-250,000 km mark. Regular fluid changes following the manufacturer's recommendations can help prolong its life. Look for any slipping or delayed engagement.
• Rust Prevention: Rust is a common enemy for older cars in New Zealand. Inspect wheel arches and the underbody frequently for corrosion. Addressing rust early prevents it from spreading and causing more significant structural damage.
• Oil Leaks: Engine seals can dry out and leak over time. Regular oil level checks and addressing leaks promptly prevent engine damage from oil starvation.

Questions owners ask

What are some common problems I might encounter with my 1982-1984 Mitsubishi Sigma in New Zealand?

Common issues with the Mitsubishi Sigma Base include automatic transmission problems like slipping or delayed engagement, rust formation in wheel arches and the underbody, and oil leaks from engine seals. Keep an eye on these areas to prevent larger issues.

How often should I service my Mitsubishi Sigma 1982-1984?

The recommended service interval for your Mitsubishi Sigma is every 10,000km. Regular servicing, including checking and replacing filters, is crucial for maintaining its performance and reliability.

Where can I get parts like oil filters or brake pads for my 1982-1984 Mitsubishi Sigma in NZ?

CARFIX stocks over 200 SKUs for the Mitsubishi Sigma 1982-1984. You can find parts like OIL FILTER, BRAKE PADS FRONT, and more on our website or in-store.

What should I check for when preparing my Mitsubishi Sigma for a WOF inspection in New Zealand?

When prepping your Sigma for a WOF, pay close attention to rust, especially around the windscreen and rear window seals, sills, and floor pan. Also, check for excessive free play in the steering linkages and underbody corrosion, particularly on chassis rails and suspension mounting points.

My Mitsubishi Sigma's automatic transmission is slipping. What could be the problem?

Automatic transmissions in the Mitsubishi Sigma can be prone to failures, especially around the 150,000-250,000 km mark. Slipping could indicate a need for a transmission fluid change or, in more severe cases, a rebuild. Check the fluid level and condition first.

How can I prevent rust on my Mitsubishi Sigma, and where should I look for it?

Rust is a common problem for older cars like the Sigma in New Zealand. Regularly inspect wheel arches, the underbody, and areas around window seals for corrosion. Addressing rust early will prevent it from spreading. Consider rust prevention treatments to protect vulnerable areas.

What are the common causes of oil leaks in a Mitsubishi Sigma, and how can I address them?

Oil leaks in the Mitsubishi Sigma often occur due to dried-out engine seals, such as crankshaft, camshaft, and valve cover seals. Regular oil level checks and prompt repair of leaks are essential to prevent engine damage from oil starvation. Replacing the worn seals is the typical solution.