BMW 650i Rocker Cover Gasket Replacement
This BMW 650i was booked in due to oil leaks and a noticeable oil smell after driving, a very common issue on BMW models fitted with the N62B48 V8 engine. As these engines age, rocker cover gaskets harden and shrink, allowing oil to escape onto hot engine components.
Addressing these leaks early is important to avoid further issues, including smoke from the exhaust area, degraded hoses, and damage to surrounding components.
The Issue
On inspection, oil residue was present around the rocker covers and along the sides of the engine. On the N62 engine, rocker cover gasket failure can lead to:
Oil leaks down the sides of the engine
Burning oil smells through the cabin
Oil contamination of ignition components
Increased risk of secondary failures if ignored
Due to the tight packaging of the V8 engine bay, access to the rocker covers is restricted and requires careful disassembly.
Our Diagnosis Process
Before carrying out the repair, we performed a full inspection to confirm the source of the leak, including:
Cleaning and inspecting leak areas
Checking for oil pooling around ignition components
Inspecting related seals and breather components
Confirming no additional oil leaks were present
This ensured the rocker cover gaskets were the primary cause and that the repair would fully resolve the issue.
The Repair
Replacing rocker cover gaskets on the BMW N62B48 is a detailed job. The repair involved:
Removing intake and ancillary components for access
Carefully removing both rocker covers
Cleaning all mating surfaces thoroughly
Installing new OEM-spec rocker cover gaskets
Replacing seals and grommets as required
Reassembling components to factory specifications
Once reassembled, the engine was cleaned, started, and rechecked to confirm there were no remaining leaks.
The Result
The BMW 650i was returned with dry rocker covers, no oil smell, and a clean engine bay. The oil leaks were fully resolved, restoring proper engine operation and preventing further oil-related issues.
Why These Repairs Matter on BMW V8 Engines
BMW V8 engines like the N62 are refined but complex. Oil leaks are common as seals age, and repairing them correctly requires experience with BMW-specific layouts and procedures. Proper gasket replacement helps protect engine components and maintain long-term reliability.
If your BMW is showing signs of oil leaks or burning oil smells, timely inspection and repair can prevent much larger problems down the track.
Book Your BMW Service or Repair
If your BMW is showing signs of oil leaks, burning oil smells, or is due for routine servicing or repairs, our team can assist. From detailed diagnostics through to complex engine sealing work on BMW V8 models, each vehicle is assessed and repaired with care.
