My son's 940 turbo last had its turbo oil cooler hoses replaced eleven years ago when he drove off to grad school. He had the car back here and we decided "all new hoses". I took off the oil cooler hoses and as I expected, they were severely deteriorated from oil dripping off the filter whenever it is changed. They were worst above the clamps but stiff softening below. So advice for all: if your turbo oil cooler hoses are aging and older than about 8-9 years, consider replacing them as cheap insurance against sudden coolant loss.
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