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Ford G6 engine: known problems
Used in 2 guides · 2606cc petrol · 6 known problems
Displacement
2606cc
Layout
I4 NA
Fuel
petrol
Known problems6
Everything our guides list for the variants with this engine: the engine itself plus the gearbox and ancillaries it's paired with. Each shows which cars it's listed for.
High
Timing belt neglect
The G6 is belt-driven, not chain-driven as some parts listings suggest. A snapped belt on a high-km bargain ute causes valve damage on an interference engine, and many cheap examples have unknown belt history.
Fix: Replace the timing belt, tensioner and water pump together if history is unknown; then keep to ~100,000km / 5 years.
Listed for: Ford Courier PC-PH
High
Head gasket failure / warped head
Overheating from a tired cooling system can blow the head gasket and warp the alloy head - a documented G6 outcome.
Fix: Keep the cooling system fresh (radiator, thermostat, fan). Machine the head and replace the gasket if affected.
Listed for: Ford Courier PC-PH
High
Cylinder head warping / cracking after overheat
The 12-valve G6 head is known to warp, crack or 'go soft' if the engine is ever overheated (tired radiator, fan clutch, head-gasket weep). Symptoms: coolant loss, white exhaust, oil/coolant mixing, overheating under load.
Fix: Keep the cooling system fresh; address any overheat immediately. Repair = head skim or replacement and gasket; check the block for cracks.
Listed for: Mazda Bravo (B-Series) UF / UN
High
Timing belt failure
Belt-driven engine; with most cars decades old and belt history unknown, a snapped belt can wreck valves.
Fix: Replace timing belt, tensioner and water pump together on purchase if records are missing; stick to the 100,000km interval.
Listed for: Mazda Bravo (B-Series) UF / UN
Medium
Ignition / fuel delivery no-start and rough running
Aged distributor, cap, rotor, leads and idle/fuel components cause hard starting, rough idle and stalling on older G6 cars.
Fix: Refresh distributor cap/rotor/leads, clean the idle air and fuel system; check timing.
Listed for: Ford Courier PC-PH
Low
Oil leaks and tired ancillaries
Rocker cover, front and rear main seals weep with age; distributor, hoses and engine mounts perish on these older petrol fours.
Fix: Reseal as needed; budget a consumables refresh on an older example.
Listed for: Mazda Bravo (B-Series) UF / UN
Cars with the G62
From the FlamingCars guides for these cars. Specs are shown only where the guides agree and the value is verified.