Toyotas warranty is 5 years or 100,000 miles thus the repairs carried out at 98,000 miles would have been covered (provided the car had been serviced in accordance with toyotas requirements of course).

Although the car is now out of warranty the work carried out at 98,185 miles should have its own gaurantee and any issues with that repair should still be sorted.

Any new problems identifed will not be covered.

Repair work undertaken during a new car warranty, which this was, doesn't itself come with any additional warranty - regardless of manufacturer.

We don't have the full story here.

The head gasket was repaired at 98,000 miles when the car was within the new car warranty mileage limit. The then owner would have had the choice of taking out an extended warranty when the car was approaching the 100,000 mileage limit, but chose not to.

When problems arose at 103,406 miles, the then owner was told the car was outside warranty. The car wasn't repaired and was taken off the road by the then owner 1200 miles or so later. The car was eventually put through auction - where the present owner bought the car.