MGA

1955-1962 / Roadster / Coupe / United Kingdom

Minor Engine, Twin Cam (DOHC 1,588cc)

Oil Consumption

Symptoms

The Twin Cam consumes oil at a rate that seems alarming to anyone accustomed to modern engines. Topping up between services is normal.

Cause

The DOHC head's valve stem seals and the engine's breathing characteristics lead to oil consumption. Some is inherent to the design; excessive consumption indicates worn valve guides or piston rings.

Fix

If consumption exceeds 1 litre per 1,500 km, investigate valve stem seals and piston ring condition.

Valve guide replacement and ring replacement require engine disassembly.

Cost: $3,000-$8,000 depending on extent.

Cost mentioned in fix

Cost: $3,000-$8,000

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// More MGA problems

Other known issues

Minor Engine, Twin Cam (DOHC 1,588cc)

Piston and Bore Damage

High oil consumption, blue smoke from the exhaust, loss of compression. In severe cases, complete piston failure.

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.

View all 16 MGA problems