Cylinder wear limits

[paulcap]

I have a 2001 Avensis 1.8 1ZZ-FE with the oil burning problem (for the second time). It's probably a combination of stuck oil rings and blocked piston oil holes like last time. The engine has now done 125k miles and I need to consider whether it needs a re-bore. I can see everywhere advice like " it needs a re-bore if the cylinders are excessively worn" but nowhere, including in the service manual, does it say how much wear is acceptable. I have measured the cylinder with the most carbon on the piston and the diameter is evenly 0.06 mm more where the rings travel than where they don't. Does anyone know if this is OK?

Thanks in advance

Paul

[Devon Aygo]

Bore should measure 79.00 -79.13mm at any point,  the bore is nikasil coated there is no tolerance for re-honing if the block measures greater than 79.13mm it is scrap