Oil filter housing gasket: oil leak onto the belt and the alternator
Typically between 64,000 and 246,000 km. It does not show up on every car.
expensive
severity
between 64,000 and 246,000 km
mileage
1
sources
1 source. A forum, a video or a complaint.
The fault
How you spot it
A rubber gasket seals the oil filter housing to the block. The gasket hardens over the years, and oil leaks from under the housing. The oil drips onto the drive belt and the alternator.
Three things can happen. The oil stretches the belt and it can jump off (on a single belt engine that means an instant loss of the water pump and the alternator); oil getting into the alternator destroys the windings; and oil reaching the hot exhaust smokes and gives a burnt smell, and the official complaints do include burning smells and smoke.
The leak is visible: five minutes on a lift settles it. The gasket itself is a cheap part; the labour, the ruined belt and the alternator take the money.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Engines and transmissions
Engine
N20B20
Engine
N52B25
Engine
N52B25OL
Engine
N52B25UL
Engine
N52B30
Engine
N53B30
Engine
N54B30
Engine
N55B30
Engine
B46B20O1
Engine
B48B20
Engine
B48B20M1
Engine
B48B20O1
Engine
B48B20U1
Engine
B58B30
Engine
B58B30TU1
Engine
B46B20B
Engine
B48A20
Engine
B48A20H
Engine
B48A20M0
Engine
B48A20M1
Engine
B48A20P
Engine
B48A20T1
Engine
B48A20U1
Engine
B58B30M2
Engine
N53B25
Engine
N53B25UL
Engine
N53B30OL
Engine
N53B30UL
Engine
B48B20O0
Checklist
Oil filter housing gasket: oil leak onto the belt and the alternator
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
reported complaints only. That does not prove the car you are looking at has it.
Information, not an expert opinion
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.
- A fault on the list does not mean the car you are looking at has it.
- A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
- You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.