1993 Honda Civic Si Problems

RepairPal has identified the most common problems with the 1993 Honda Civic Si as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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9
Known Problems

Select year models of the Honda Civic Si may have problems with the EVAP canister vent solenoid. It stops responding to commands to open and close, and the following occurs:

  • Illumination of the check engine light
  • OBD trouble code P1457 is stored
  • Engine takes longer than usual to start
  • Fuel mileage decreases noticeably
  • The valve is located on the charcoal canister, and is meant to open and close upon command. It fails due to corrosion breaking one of two internal seals, which allows air to escape the system, signaling the OBD trouble code P1457.

    Correcting the problem can be done by replacing the vent valve, or, in some cases, cleaning and resealing the vent valve has been successful. You can get an estimate for this repair here.

    A worn, missing, or loose gas cap can cause the same issues.

    The camshaft seal, located at the end of the cylinder head, has a reputation for failure on the 1990-1995 Honda Civic Si.

    This seal wraps around the camshaft to prevent engine oil from leaking where the camshaft exits the cylinder head.

    Replacing the leaky seal requires timing belt removal, so timing belt and water pump may be recommended if your vehicle is near the service interval.

    The Honda Civic Si from 1990-1995 commonly has radiator leaks after many years of normal operation. The leak starts small, but may cause:

  • Coolant puddling under vehicle
  • Engine overheating
  • Unexplained coolant loss (only at first)
  • Vehicle in “limp mode”; loss of power
  • Cylinder head or head gasket failure
  • The coolant leaking can have a severe effect on your vehicle if left in disrepair. If the radiator is diagnosed as the leaky part, it will need to be replaced, or resealed if that is an option.

    Note: coolant is toxic to animals, but tastes sweet. Any coolant spills should be cleaned to protect animals and children.

    Certain models can leak oil externally or allow coolant into the combustion chamber due to a faulty head gasket. The head gasket needs to be replaced to correct this problem.

    Certain models can have a crowned rear brake drum that can cause a vibration when braking. The rear drums will have to be replaced to correct this issue.

    The front brake rotors can warp and cause a vibration when braking. The rotors will need to be machined or in cases where they are worn to thin, replaced to correct this issue.

    Plugged moon roof drains can cause a water leak inside the car, usually over the head of the driver or passengers head when turning a corner. Cleaning the drains will fix this problem.

    Damaged engine mounts can lead to vibration and roughness felt in the steering wheel. A rattle in the dash and engine area may also be heard. Replacement of damaged mounts will commonly correct these issues.

    Rear trailing arm bushings crack and break. The trailing arm bushings will need to be replaced when they break.