Irritation noise on startup

[Pdwight]

It is a tinny noise and when you rev the engine sitting still you hear it...when on the road and really get on it you do not hear it. When I got my secondary cat delete pipes a lot of it went away...but not all....It really sounds like muffler internal noise...perhaps a loose baffle... Does anyone else have this ??

THanks

Dwight

[Timco]

Heat shields?

Muffler going bad?

Loose coupler?

Sure it's exhaust? Tried removing the belt and running it for a minute or two?

[Pdwight]

Thanks Tim, not the heat shields...had all that stuff off when I removed the rear axles for my bearing job. The couplers were in good condition, I reinstalled them using brand new stainless bolts....I have not tried removing the belt and running....you thinking water pump or ???

[Timco]

Originally Posted by Pdwight

Thanks Tim, not the heat shields...had all that stuff off when I removed the rear axles for my bearing job. The couplers were in good condition, I reinstalled them using brand new stainless bolts....I have not tried removing the belt and running....you thinking water pump or ???

I had terrible start up noise. Turned out to be: 1) grooves in cam pulley had mostly filled with rubber. Made squishy sound or squawk sound 2) alternator bearing bad and made crunchy / rattle sound 3) water pump vanes rubbing on block opening until car warmed up. All startup noises, but alternator got worse.

Made a symphony of noises it turned out, but the work truck is a Ford so I was used to that. When those three things were fixed it was silent.