MGA

1955-1962 / Roadster / Coupe / United Kingdom

All MGA problems All workshop issues

Critical Cooling System

Radiator Inefficiency

Symptoms

Overheating in traffic or on hot days. Temperature gauge climbs above normal.

Cause

The original radiator's capacity is marginal for Australian conditions. Core tubes block with scale and corrosion over time, reducing cooling efficiency. The original thermostat may be stuck or incorrect.

Fix

Flush the radiator and cooling system.

If the radiator is severely blocked, have it re-cored with a higher-efficiency core.

Check and replace the thermostat.

An electric fan behind the radiator is a common upgrade.

Cost: $200-$600 depending on what's needed.

Cost mentioned in fix

Cost: $200-$600

Know something we don't?

Owned a MG MGA? Share your experience with this issue. What worked, what didn't, costs, tips. Help the community.

Submit an update

// More MGA problems

Other known issues

Minor Rust

Sill (Rocker Panel) Corrosion

The sills become soft, bubbly, or perforated. The body may flex excessively when jacked up or driven over bumps. Doors may not shut properly as the body distorts.

Common Rust

Floor Pan Corrosion

Soft or perforated metal in the floor pans, visible from underneath. Water may pool in the footwells. The floor may flex under foot pressure.

Minor Rust

Front Crossmember Corrosion

Visible rust, scaling, or perforation of the front crossmember (visible from underneath the front of the car).

Minor Rust

Rear Spring Hanger Corrosion

The rear spring mounting points show rust, cracking, or distortion. The rear of the car may sit unevenly or make clunking noises.

Critical Engine, BMC B-Series (1,489cc / 1,588cc)

Oil Leaks

Oil weeps from the rocker cover gasket, timing cover, rear main seal, and sump gasket. A layer of oil covers the engine and transmission.

Common Engine, BMC B-Series (1,489cc / 1,588cc)

Carburettor Wear (SU H4)

Rough idle, poor fuel economy, hesitation on acceleration, black smoke from the exhaust. The engine may run rich or lean depending on which component has worn.

View all 16 MGA problems