my 1990 has just started doing this all the time,
Squeals like a banshee when idling, with a wierd chirping sound going on too
when I rev up , it goes quiet.
before it got to this point, it seemed only to squeak for a short time when first started up on cold mornings, on hot days, it didn't.
I've been thinking it's an idler pully too, but maybe the water pump? I don't think it's the PS pump, but who knows, so if I'm going in there to fix the those two issues, I might as well swap out to a new radiator and open system with an electric fan. And if I'm going to have it up on stands, then I might as well grab that 242 and D44 from the junk yard. (now I'll need new springs and shocks for the lift) So before I even start, the jobs getting to big for me to do in a 1/2 hour. and I don't have all the parts, :-( nor a plan for splaining how a squeaking engine costs so much for fixing, and has to be in the garage for so long.
Let me know how you fix it. incase I just take the short route.
2006 TJ Unlimited (Midnight Blue #888)
75k- 2.5" lift, riding on 32's with terraflex rocker armor