help !!! 2.5 noise at start up an revs @ 2500 plus

I have a 1992 Daytona 2.5 4 banger.. on start up it idles hig as usual but today it had a rattle.. then if I rev it up over 2500 in neutral.. it sounds
like a bearing noise.. Is this the rod bearings.. ?.. People kee saying piston slap but I have had 2.5's with that and this doesn't sound like it.. Any info would be great
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but
sounds
it..
How would someone on here answer such a question without hearing the noise???????
Glenn Beasley Chrysler Tech
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