I fitted a Dayco cambelt today and found the white lines had been incorrectly marked one tooth out. See from the picture of the old and new side by side. I double checked the tooth count with the workshop manual and found it should have 51.5 teeth between the marks, this belt was 50.5. Beware DIY'ers always trust the marks on the engine and don't rely on the markings on Dayco belts.