HK-HG Monaro / GTS

1968-1971 / Coupe / Australia

All HK-HG Monaro / GTS problems All workshop issues

Common Electrical

Ignition System Deterioration

Symptoms

Misfiring, rough running, poor starting, timing drift.

Cause

Points, condenser, distributor shaft bushings, plug leads, and coil all deteriorate with age.

Fix

Fit an electronic ignition module (Pertronix or similar, $100-150) to eliminate points and condenser.

Replace plug leads with quality silicone-insulated leads.

Replace the coil.

Budget $200-400 for a complete ignition system refresh.

Cost mentioned in fix

$100-150Budget $200-400 for a

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Other known issues

Common Electrical

Generator/Alternator Charging Issues

Battery goes flat, dim lights, instruments dim, engine stalls.

Critical Engine, Chevrolet V8 (327ci / 350ci)

Intake Manifold Gasket Leaks

Coolant leak at the front or rear of the intake manifold. Coolant may drip externally or, worse, leak internally into the engine oil. May also cause a vacuum leak, resulting in rough idle and poor fuel economy.

Common Engine, Chevrolet V8 (327ci / 350ci)

Rochester Quadrajet Carburettor Issues

Hesitation on acceleration (bog), flooding, fuel smell, hard starting when hot, black smoke, erratic idle.

Critical Engine, Chevrolet V8 (327ci / 350ci)

Overheating Under Load

Temperature gauge climbs on highway drives, particularly towing or climbing hills. May push coolant out the overflow. Engine pings (detonation) under load.

Common Engine, Chevrolet V8 (327ci / 350ci)

Hydraulic Lifter Noise

Ticking or clattering from the top of the engine that varies with RPM. May be audible at idle and disappear at higher RPM, or vice versa.

Common Engine, Holden Six (186ci) and V8 (253ci)

Oil Leaks, Rear Main Seal

Oil drips from the bellhousing area. Oil accumulates on the underside of the engine and transmission.

View all 18 HK-HG Monaro / GTS problems