Peak PerformanceMobile Mechanics

Barina misfire: rocker cover gasket leaking into the spark plug wells

Holden Barina. Diagnosed and repaired on site in Perth.

Red Holden Barina in a driveway with the bonnet open

The file

Reported
Engine light on, misfiring and spluttering.
Tested
Misfire diagnosis.
Found
The rocker cover gasket was leaking oil into the spark plug wells, contaminating the spark plugs and ignition coils.
Done
  • Rocker cover gasket replacement
  • New spark plugs
  • Replacement ignition coil packs
  • Engine misfire diagnosis
Result
Parts sourced and the repair finished on the same day.

What happened

The customer rang us about an engine light, misfiring and spluttering. They rely on the car every day, so a long wait for a workshop slot was not an option.

After diagnosing the misfire we found oil where it should never be. The rocker cover gasket had let go and oil was running into the spark plug wells, soaking the plugs and the ignition coils around them.

Replacing only the plugs would have fixed it for a short while. We replaced the gasket that caused it, then fitted new plugs and coil packs. We sourced the parts and finished the job on the same day.

Oil fouledNew plug
The rocker cover gasket was leaking oil into the spark plug wells, soaking the plugs and the ignition coils around them.
  1. The callEngine light, misfire and spluttering.
  2. On siteMisfire diagnosed. Gasket leak found.
  3. Same dayParts sourced, repairs completed.

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