Common Places for exhaust leak on 5.7?

[riccorizzo]

Guys,
On my 90 Brougham 5.7.. at high rpms a can hear a slight squeal.. sounds like a little exhaust leak... are there any common places on these cars where leaks develop? Certainspots on the air injection lines or anything? Thanks
-Adam

[elwesso]

Im not sure about common places where they form.... I guess in places where pipes come together (IE fittings) would seem most common to me.....

If you could narrow it down to places like near under the hood, under the car, or near the rear......

[riccorizzo]

Originally Posted by elwesso

Im not sure about common places where they form.... I guess in places where pipes come together (IE fittings) would seem most common to me.....

If you could narrow it down to places like near under the hood, under the car, or near the rear......

its under the hood.. ive had a string of ford 5.0 and they all rot out at the check valves and injection lines.. i thought maybe theres an etremely common place for this to happen.. ill take a closer look tommorow...

[elwesso]

Well..... First Id check for rust.....

Then, if its under the hood, I bet its leaking somewhere around the manifold......

[joeveto]

Most exhaust leaks I know of, do not produce "slight squeals." An exhaust leak, caused by a cracked manifold, or a leaky gasket, will make a popping or quasi-knocking noise. Kind of a rap rap rap rap rap.

The squeal, I don't know, I'm thinking belt slippage.

[brougham]

Or maybe a vacuum leak somewhere. It shouldn't be too hard to tell what's making the noise.