Oil is good (yes, i do check it and it was changed 1500km ago). Rad was flushed last fall as was transm. All the fluids are appropriately filled

Was back out on Saturday and no noise was heard. Must assume that it was just the fan due to the extreme heat that day. I don't usually take the old girl out in that kind of heat (hell the driver doesn't want to go either when the A/C has never worked haha). Even in that heat, unless I'm stuck in traffic, the temp rarely climbs over N-O.
Yep a CEL but it's vacuum leak codes and there's just no way I'm going to lean my bits n' pieces over a running motor to find that pesky hiss that I can hear (and occasional raw fuel)- am a tad short to even check the trans fluid.
Will be keeping a close ear on it.
TYTY for opinions. Slept better