You wouldn’t install a used oil filter on a new or overhauled engine, would you? Of course you wouldn’t, and for the same reason, you shouldn’t reconnect the oil cooler without replacing it, or at least having it properly serviced.
Often one of the most neglected components under the cowling, the oil cooler on your engine could be in desperate need of servicing, even if it’s not begging for attention by dribbling oil on the hangar floor. Luckily, there are relatively inexpensive replacement and overhaul options that might provide insurance against premature engine wear. Let’s have a look.