The 1.8 turbo petrol engine is based on the Rover K-series, which was notorious for head gasket failure, especially in its largest 1.8-litre capacity. Naturally, this is a concern for potential MG6 buyers and is quite often the first thing they check, even though the redeveloped unit has no evidence of the head gasket being weak at all. Reportedly, it was the first element of the engine that MG’S engineers attended to during the pre-launch phase to ensure there would be no repeat of the bad publicity that affected the otherwise excellent K-series.
Everything else about the unit relates to the good things about Rover’s original K: strong performance for its size and excellent low-down power delivery. To be honest, the unit is a bit loud and raucous, especially at cruising speeds. It’s punchy and lively, but it lacks refinement. The only known problem appears to be occasional hot-start issues, caused by a bad reading from the crank position sensor; this is often cured by removing the sensor and cleaning the connections.
Diesel models have proven pretty reliable, though they’re largely too young or low-mileage to have thrown up any major dual mass flywheel, clutch or DPF issues. As with any modern diesel, we’d exercise caution in respect to all of these and check for poor running, an uneven idle or a light metallic ‘ticking’ noise when the clutch is disengaged, which could point to a future flywheel issue.