…… and how it will kill your turbo.
All too often we hear of turbo failure of the K04 turbocharger, as used on the Z20LEx engines in Astra G and H, Zafira A and B, VX220 and all too frequently we hear the turbochargers being blamed as poor quality or ‘rubbish’ units, which is not the case.
In nearly all cases of turbo failure, the source of the problem is not down to the unit itself but usually due to oil contamination and/or incorrect fitting procedure. It is also important to carry out eliminating the initial cause of failure, if it was a failure caused by something other than old age/wear and tear. Additionally allowing oil to get dirty during use and poor or infrequent oil changes using poor quality oil will also contaminate the turbo causing failure.
The picture gallery below contains images from of a ‘failed turbo’ that was under 10,000 miles old which was dis-assembled and inspected and a report produced. The cause of the bearing failure in the turbo is down to contaminated dirty oil….. you cannot blame the turbo itself for the failure.
Here is the report, basically detailing how dirty oil has ‘scrapped’ the turbo:
The good news is the wastegate assembly and actuator are still in good condition!
Some pictures of the damaged components:
Oil Contamination Fact Sheet: