IsItAGoodCar
Reliability Guide

Common Problems with the
1985 Reliant Rialto

We've identified 3 known issues that can affect the 1985 Reliant Rialto. None are considered critical, but they're worth knowing about before you buy.

3
Known Issues
0
Serious
3
Moderate
0
Minor

All Known Issues

Front Suspension Swing-Arm and Steering Bush Wear

ModerateSteering

The single front wheel on the Rialto is mounted on an unsprung leading/trailing swing-arm arrangement carrying the full weight of braking and cornering. Road potholes and speed cushions accelerate wear on the front pivot needle roller bearings and steering headstock bushes. Neglected grease lubrication leads to excessive slack, causing vagueness in the steering, front tyre scuffing, and severe MOT failure.

Est. Repair Cost: £160–£380
Warning Signs:

Excessive play in steering wheel before the front wheel responds, Wandering or darting across white lines and road camber transitions, Loud knocking clunk over tarmac potholes and dropped kerbs, Uneven tyre tread wear across the central front steering tyre

What to Inspect:
  • Raise the front of the car on an axle stand and check the front swing-arm for lateral play.
  • Check the headstock pivot bearings for notchiness when turning the steering from lock to lock.
  • Inspect grease nipples on the front suspension assembly for regular lubrication.
Verified by IsItAGoodCar Research TeamUpdated

HT-E High-Compression Cylinder Head Warpage

ModerateEngine

In 1984, the Rialto 2 adopted the HT-E (High Torque Economy) engine featuring a modified cylinder head running a high 10.5:1 compression ratio and distinct yellow rocker cover. The high compression puts increased thermal stress on the thin alloy cylinder head. If the cooling system develops limescale buildup or the electric fan fails, the head quickly overheats and warps, blowing the head gasket between cylinders two and three.

Est. Repair Cost: £280–£650
Warning Signs:

Loss of power and rough running across mid-range RPM under hill climbing, Pinking or pre-ignition under acceleration on modern standard unleaded petrol, White sweet-smelling exhaust steam persisting after warmup, Pressurised cooling system pushing coolant into the plastic overflow bottle

What to Inspect:
  • Perform a compression test across all four cylinders to identify adjacent low readings.
  • Check for yellow rocker cover confirming HT-E specification and verify timing is set for unleaded.
  • Inspect coolant header tank for bubbles while the engine is idling warm.
Verified by IsItAGoodCar Research TeamUpdated

Rear Leaf Spring Shackle and Mounting Plate Corrosion

ModerateSuspension & Chassis

Although the Rialto's main chassis rails were galvanised from the factory, the rear suspension mounting plates, spring shackle pins, and steel U-bolts were not galvanised to the same thickness. Electrolytic reaction between dissimilar metals and road salt causes heavy corrosion around the rear spring eyes. Worn rubber bushes allow the spring leaves to twist, causing axle tramp under acceleration and unpredictable rear-end breakaway.

Est. Repair Cost: £180–£450
Warning Signs:

Squeaking or groaning from the rear suspension over speed humps, Rear body stance sagging lower on one side due to tired leaf springs, Axle shuddering or hopping when pulling away abruptly on wet roads, MOT test failure for deteriorated rear spring leaf bushes or corroded shackles

What to Inspect:
  • Inspect rear leaf spring shackle plates and pivot pins for heavy rust flaking.
  • Check condition of the rubber spring eye bushes for crumbling or perishing.
  • Examine leaf spring leaves for cracks, broken retaining clips, or loss of arch camber.
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 1985 Reliant Rialto

  • Inspect the single front wheel swing-arm and pivot needle roller bearings for play, as potholes quickly wear out neglected front-end bushes.
  • Check that the HT-E engine on Rialto 2 models has not been run on low-octane fuel without adjusted ignition timing, as pinking can damage high-compression pistons.
  • Examine the rear leaf spring hanger plates, U-bolts, and shackle pins for corrosion, which can seize or fracture despite the galvanised main chassis.
  • Verify smooth gear engagement in the 4-speed manual gearbox, checking for worn second-gear synchromesh or a binding clutch cable.
Check a 1985 Reliant Rialto by Registration