Plan some time incase the job goes bad. I lost 3 of the Aluminum threads on one of the Oil Cooler Nipples.
There is a repair for this in the DIY section but it involves Hacksawing the Nipple off, drillinging it, tapping in and installing a Steel Nipple kit you can get from the dealer. The Kit itself does not cost much but rounding up the proper sized Drill Bit and Tap (sells a OSH Hardware for about $13 it is the Drill Bit that is hard to find and is expensive) at a resonable price in a short period of time could be a problem.

One of the Members suggested using a Dremel tool with a fiber cutoff disk and cutting a slot through the Hose nut and spreading the nut out before you thread it off so that it turning the nut off does not damage the threads.

In my case I was using a large 1-1/16 Combination Wrench. With the long handle and heavy Wrench I did not feel anything. A piece of Aluminum thread stuck in the threads of the nut and acted as a cutter for 3 of the threads as I unscrewed it.

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84 300D, 82 Volvo 244Gl Diesel