99 rodeo engine squeeling from the rear

[dufferdad]

Our 99 isuzu rodeo engine is squeeling, but the noise is coming from the rear of the motor. The noise is what you might expect from a loose belt or bearing but they appear to be all up front. The pitch does change with the RPMs. What might be making that kind of noise from that location?

[amigo-2k]

The only think I can think of is that your EGR is plugged and is whistling

or
your intake manifold gasket let loose and and is whistling

[rodeo02]

Bad intake manifold gasket is my guess as well. They can give off a squeal,screech,hum type noise when they develop a crack. Air gets sucked through the crack causing the gasket material to vibrate like a reed. You will notice it most at idle/low throttle (hi vac) conditions.
G/luck
Joel

[2eyefishclaw]

Need More Info Cant Help If I Dont Know What I Am Trying To Help With (what Engine Is Planted In This Pig)