Cylinder Scoring

[Cheech]

Good Morning All,

A lot of you will be aware of the Focus RS MKIII head gasket issue.

Our car was inspected a month ago, failed the coolant pressure test and coolant found to be entering a cylinder/s. Dealer has ordered a new head, head gasket and assorted consumables. These have arrived and the car is booked in mid April.

I had first reported intermittent abnormal white smoke in April 2017 (complete with a few videos). However, as it was intermittent the dealer couldn't do anything about it. I was aware that eventually a recall/fix would be coming, so held off. Have lost approx 1/4 of the coolant in the reservoir.

So being wary of cylinder damage, I've told the dealer that I will be coming down to inspect once the head comes off. I've consulted Dr.Google to check images of cylinder scoring.

So at what point would cylinder scoring be considered bad enough to warrant a replacement engine ?

Note that engines have been found overseas to be scored badly enough to require a replacement under warranty.