IsItAGoodCar
Reliability Guide

Common Problems with the
1985 Talbot Horizon

We've identified 3 known issues that can affect the 1985 Talbot Horizon. 2 of these are serious faults that could be expensive to repair.

3
Known Issues
2
Serious
1
Moderate
0
Minor

All Known Issues

Front inner wings, suspension towers, and sill corrosion

SeriousBodywork & Rust

Constructed from untreated thin-gauge steel typical of late-1970s Chrysler Europe manufacturing, the Horizon shell is exceptionally vulnerable to salt and road spray. Road dirt gathers behind the unlined front wheel arches and inner wings, causing hidden structural perforation around the front suspension towers and bulkhead. Simultaneously, moisture trapped in the box sills and jacking points rots the structure from the inside out, leading to costly structural MOT failures.

Est. Repair Cost: £350–£1,100
Warning Signs:

Visible bubbling and pinholing along the front wing arches and outer sills, Crunching sounds or flexing metal when placing a trolley jack under standard jacking points

What to Inspect:
  • Shine a torch into the front inner wings and probe around the upper suspension mounting towers
  • Inspect the underside of the floor pans, seatbelt mountings, and rear wheel tub seams for previous patch repairs
Verified by IsItAGoodCar Research TeamUpdated

Cooling radiator silting and blown cylinder head gasket

SeriousCooling System

The compact engine bay of the transverse Horizon restricts airflow, placing significant thermal stress on the downflow radiator core. Over time, internal limescale and sediment clog the narrow water tubes, leading to localised boiling. If uncorrected, this thermal cycling warps the cast-iron cylinder head mating face and blows the composite head gasket, allowing oil and coolant to mix and precipitating sudden roadside breakdowns.

Est. Repair Cost: £250–£650
Warning Signs:

Coolant temperature gauge needle creeping steadily into the red sector during slow city traffic, Mayonnaise-like emulsified oil sludge beneath the rocker oil filler cap and coolant bubbling in the header tank

What to Inspect:
  • Feel the radiator surface by hand with the engine running to check for cold spots indicating blocked internal tubes
  • Inspect the radiator thermo-switch to verify the electric cooling fan spins freely when operating temperature is reached
Verified by IsItAGoodCar Research TeamUpdated

Simca Poissy pushrod engine tappet clatter and camshaft wear

ModerateEngine

The 1118cc, 1294cc, and 1442cc Poissy pushrod petrol engines fitted to the Horizon are renowned for their characteristic clattering valvetrain. While durable in their basic casting, the mechanical rocker shaft, pushrods, and valve tappets wear quickly if oil changes are neglected. Even when correctly adjusted with feeler gauges, the valvetrain produces a loud sewing-machine metallic clatter, which becomes deafening if the camshaft lobes wear flat due to blocked oil galleries.

Est. Repair Cost: £120–£450
Warning Signs:

Loud, rhythmic metallic tapping from the upper rocker cover that accelerates with engine speed, Loss of top-end power and rough engine idle caused by reduced valve lift

What to Inspect:
  • Remove the oil filler cap and inspect for black sludge accumulation around the rocker gear
  • Listen carefully to the cylinder head with the bonnet open as the engine revs from idle to 2,500 rpm
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 1985 Talbot Horizon

  • Check inner wings, suspension strut mounts, and sills thoroughly: thin steel and poor factory rust-proofing claimed the vast majority of UK Horizons.
  • Listen to the Simca pushrod engine at warm idle: loud upper-engine clatter indicates worn rocker gear and out-of-adjustment mechanical tappets.
  • Prefer Series 2 models from 1984 onwards if you intend to tour: they feature the far slicker Peugeot-developed BE1 five-speed gearbox in place of the older four-speed unit.
Check a 1985 Talbot Horizon by Registration