The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.
The N55 was BMW’s first straight-six engine to use a twin-scroll turbocharger. It also won three straight Ward’s 10 Best Engines awards in 2011–2013.
We received our customers 535i GT in for the Walnut Blast and found that this was one of the trickier inlet manifolds to remove. Usual story of one bolt being hidden away requiring lots of work to remove.
In addition the physical size of the GT bodyshell and engine being sat fairly low makes this literally back breaking work. Engineering Director Craig needed to see a specialist after this job. This explains the lack of pictures.
If you’ve got an N55 engined BMW bring it along for a Walnut Blast !