Developed as a Seam endeavor between Japanese automaker Suzuki and American automaker Usual Motors, the Geo Underground was sold in the USA from 1989 to 1997, when it was renamed the Chevrolet Underground. Some Underground engines posses been admitted to burn oil, which can be dealt with by simply adding oil occasionally whether the amount lost is not too great. In other cases, blown head gaskets or other catastrophic failures result in the need for an entirely new engine. The Metro engine is also known for being difficult to begin in cold weather.
One of the most Often cited problems with the Geo Underground is a failure to accomplish its advertised or expected fuel economy. This can happen for a disparateness of reasons, including common wear and tear on the engine and fuel delivery manner or driving habits that aim expanded fuel to be used than is bottom line. While the three-cylinder legend of the Geo Underground was rated for 49 miles per gallon in highway driving and 46 miles per gallon in megalopolis driving, many Underground drivers gain experienced numbers significantly below these.
Engine
Many Metros annex had engine problems, ranging from child to severe. In popular, these are due to the lifetime of many Metros on the system and the act that, as an economy vehivle, initial individuality was below customary. The Geo Underground was notable for its compact amount, low fee tag and insufficient, fuel-efficient three- and four-cylinder engines. There are indefinite accepted problems that Pestilence the Geo Underground, of which owners and prepatent buyers of used models should be trumped-up aware.Mechanic's wrenches
Fuel Economy
Exhaust
Many Metro owners have also had to service their vehicles' exhaust systems. Beyond rusted exhaust components needing replacement, Metro owners often replace catalytic converters (a particularly expensive procedure). In cases where the catalytic converter needs replacement, Metro owners often experience low fuel economy and an increase in emissions (perhaps resulting in a failed emissions test). Exhaust valves in the Metro's engine are also prone to failure.
Transmission
The Metro was available with either a manual or automatic transmission. Both versions have been known to experience several different problems. 1991 and 1992 models with the automatic transmission were especially prone to fluid entering the motor and transmission mounts, resulting in a vibration while driving in reverse. For Metros equipped with a manual transmission, gear slippage and general wear to the clutch are somewhat common further.
Brakes
Finally, the Geo Metro is known for problems involving the braking system. Metros feature front disc brakes and rear drum brakes, both of which have caused problems for some owners. Between 1990 and 1994, uneven lug nut torque was often responsible for warped rotors on the front brakes, resulting in pedal vibrations during braking. Other owners have reported a stuck parking brake, leaking brake lines and brakes with inadequate stopping power.
