Rocker Cover Gasket Replacement

Mobile rocker cover gasket replacement at your home or office, for oil leaks, burning smells and oil in the spark plug wells.

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Service Info

Typical Duration 1.5 hours

We confirm the rocker cover gasket is the leak source rather than the camshaft seals or breather, replace the gasket and any spark plug well seals, check the crankcase breather, torque the cover in sequence and clean the affected area.

Skip the garage, our master mechanics come to you

At your home or office
Fair & transparent pricing
6-month, 6000km warranty

The Most Trusted Mobile Rocker Cover Gasket Replacement

The rocker cover sits on top of the cylinder head, sealing in the oil that lubricates the camshafts and valve gear. Its gasket hardens with heat over the years until it no longer seals, and oil seeps out. Because the cover sits at the highest point of a hot engine, that oil runs down onto the exhaust manifold, which produces the burning smell people notice long before they see a leak. Michanic replaces rocker cover gaskets at your home or office.

Why Choose Our Mobile Rocker Cover Gasket Replacement Services?

  1. Common and Inexpensive:
    It is one of the most frequent oil leaks on any engine and one of the least expensive to fix properly.
  2. Coils Protected:
    On many engines the gasket also seals the spark plug wells. Oil collecting there destroys ignition coils and causes misfires.
  3. Fire Risk Removed:
    Oil dripping onto a hot exhaust manifold is what produces the burning smell, and in the worst case it is a genuine fire risk.
  4. At Your Home or Office:
    About an hour and a half at your parking bay, with no workshop booking.

Why We are the Best Choice for Mobile Rocker Cover Gasket Replacement

  • Leak Source Confirmed:
    Oil at the top of the engine can also come from the camshaft seals or a blocked breather. The actual source is identified first.
  • Breather Checked:
    A blocked crankcase breather pressurises the engine and pushes oil past the new gasket exactly as it did the old one.
  • Torqued in Sequence:
    Rocker cover bolts are tightened in the correct order to a low torque figure, because over tightening distorts the cover and causes leaks.
  • Plug Wells Cleaned:
    Oil is removed from the spark plug wells and the coils inspected for damage before refitting.

This leak is worth fixing early for reasons beyond the oil on your driveway. Oil running onto a hot exhaust manifold produces smoke and a burning smell, and it is one of the more common causes of an engine bay fire. On engines where the same gasket seals the spark plug wells, oil pools around the plugs and attacks the ignition coil boots, which causes misfires that get diagnosed as coil failures when the gasket was the actual cause. It is also a slow oil loss that eventually shows up as a low level.

Frequently Asked Questions

  • What causes a rocker cover gasket to leak?
    Age and heat. The rubber or cork gasket hardens over years of heat cycling until it can no longer conform to the sealing surface. A blocked crankcase breather that pressurises the engine accelerates it considerably.
  • Why is there oil in my spark plug wells?
    On many engines the rocker cover gasket also includes seals around the spark plug tubes. When those harden, oil enters the wells, pools around the plugs and attacks the ignition coil boots, which causes misfires.
  • Is a rocker cover gasket leak serious?
    It is not immediately damaging to the engine, but oil on a hot exhaust manifold is a fire risk, oil in the plug wells destroys coils, and the slow loss eventually shows as a low oil level. It is cheap to fix and worth doing.
  • Why did my new gasket leak again?
    The usual causes are a blocked crankcase breather pressurising the engine, a warped cover from previous over tightening, or the bolts not torqued in the correct sequence to the correct low figure.
  • Can I just tighten the rocker cover bolts?
    It rarely works and often makes things worse. The bolts are torqued to a deliberately low figure, and over tightening distorts the cover so it seals even less well than before.