Ford Focus ST: poor engine running with increased oil consumption

Data sheet
ManufacturerFord
Vehicle modelFocus
EngineHYDA, HWDA
Year of manufactureFrom 2004
SymptomPoor engine running with increased oil consumption

Important safety note Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.

Ford Focus ST: poor engine running with increased oil consumption

If poor engine running with increased oil consumption is observed in the vehicle models mentioned above, then a possible cause may be defective crankcase ventilation. In some cases, a buzzing or whistling sound has also been heard.

 

Noise detected from the engine compartment. If the noise changes after opening the oil filler cap when idling, it must be assumed that there is a defect. Due to a defective diaphragm, it is no longer guaranteed that the oil circuit is separated from the crankshaft gases. Engine oil thus enters the intake tract and causes the problems described above.

IMPORTANT

On these models, the crankshaft ventilation and the oil filter housing form one unit and must be completely replaced in the event of damage. This defect may also occur in other vehicles with the same type of engine.


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Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval; indication of the document source is also required. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.

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