> [quote:04fbefa096="Max Dodge"]> The change in sound you are
> describing sounds like a main bearing.
> Hardly. Mains make very little noise when failed. In fact, an
> engine with a
> failed main could run for quite some time, depending on how
> much oil
> pressure is lost due to the failure. Particularly in the 360,
> where the
> mains are 2.800" diameter, the crank is stiff enough to keep
> any flex to a
> Fact is, it could be any bearing on the crank, but is much
> more likely to be
> the rods than the mains.
> I agree that mains rarely make noise themselves and "might"
> cause a little vibration rumble in the engine if the get real
> loose along with bad oil pressure. But indirectly they do
> cause noise form other sources because when main gets worn,
> they can cause rods to go because of lack of oil pressure to
> rods so in a way worn mains do cause noise.
If the engine is running fine otherwise and not using much oil, I
would just put new bearing in there and be done with it myself.