Valve cover gasket and spark-tube seal leak
- Symptoms
- Oil smell, oil in plug wells causing misfire
- Likely cause
- Aged gasket
- Fix
- Replace the gasket and tube seals (OEM)
- Applies to
- All petrol
- Related fault codes
- P030x (secondary)
- Confidence
- medium
Sources
- toyotanation.com/threads/2003-2008-corolla-matrix-pontiac-vibe-common-
- toyotanation.com/threads/corolla-going-through-coil-packs.1732073/
Related problems on this car
- Intake manifold gasket vacuum leak (1ZZ)
- ZZ oil consumption (1ZZ-FE/3ZZ-FE, worse on early builds)
- Ignition coil-on-plug failure / misfire
- Timing chain tensioner O-ring oil leak
Similar problems on other cars
- Gearbox oil leak from a seal · Suzuki Cultus (2nd gen, EFI)
Where the parts are · Warning lights · Fault codes · Maintenance
Stuck with a car problem? Ask owners and mechanics for free in the UstadFix WhatsApp group.
Guidance only – confirm with a mechanic before repairs. All common problems