Recently, Jim Macklin posted:

Depending on the design of the oil cooler, they should be
inspected and maintained on a regular schedule.

Common problems are oil congealing and blockage of oil flow
in cold weather, a by-pass valve should prevent oil
starvation to the engine. The oil cooler bursting problem
is often caused by the oil pressure regulator relief valve
being stuck on engine startup, oil pressure can go into the
hundreds or thousands of pounds pressure if the regulator
valve does not open at the pump.

The engine oil pump and regulator can produce more pressure
than the system can seal or contain if the regulator sticks
even momentarily.

Good info, Jim, thanks!

Now, I'll pay particular attention to the pressure on start-up to note
whether the needle is pinned for any duration.

Neil