Static tur­bocharger

Car Mechanics (UK) - - Tales From The Workshop -

owner of this 2007 BMW 520d came to us com­plain­ing that it had sud­denly lost power. At first, he thought it was the au­to­matic trans­mis­sion caus­ing the prob­lem, but after we took the car for a test-drive we re­alised that se­lect­ing gears man­u­ally gave no bet­ter per­for­mance.

Our first thought was that per­haps the diesel par­tic­u­late fil­ter had be­come clogged and needed re­gen­er­at­ing, but this op­er­a­tion made no dif­fer­ence. Re­mov­ing the air in­let duct­ing from the turbo, we were able to con­firm that the ro­tor was not ro­tat­ing – in fact, it had locked solid!

Re­port­ing our find­ings to the owner, he sud­denly re­mem­bered that there had been a whin­ing noise for a while, which had later dis­ap­peared. He also had no mem­ory of chang­ing the oil and fil­ter. This was the rea­son he was now go­ing to have to pay out for a new turbo.

While fit­ting the new turbo and oil sup­ply pipe, we also changed the oil and fil­ter, dis­cov­er­ing that the oil fil­ter was in a very gunky state. With a cau­tion to the owner that more care over his oil changes was needed, the Beemer was handed back with full power re­stored.

The turbo im­peller was seized solid, im­ped­ing the air flow.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.