I don't know the Details but when ForcedInduction replaced the Oil Cooler Hoses on his 300D turbodiesel He replaced them with Stock Hoses but from an earlier Model. And, the earlier Model ones are easier to install because they; if I remember correctly run over the Top of the Motor Mount instead of under it.

I don't have a link to that thread I read that in so I can't direct anyone to exactly what He wrote on that.

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84 300D, 82 Volvo 244Gl Diesel