Originally Posted by
iansoutham
Very common problem.
2nd generation T5 Volvo uses the same item.
If left for too long, it will cause engine breathing issues.
If you want to confirm that it is the diaphragm @ fault in the oil fiilte housing/separator, while the engine is running and the whistling is present, remove the dipstick and the noise should go almost instantly.
Yes it's deffo gone cars been into Fords today. It does as you say above.
Do volvo sell this diaphragm separatley??