I have just bought a nice 2000 jeep cherokee lareado it has the 4.7 v8

It has a knocking sound comming from someplace, the lady i bought it from said its been like that ever since she owned it and shes put 5,000 miles on it since then. Well i bought it i've put 600 on it while i've had it here's the symptoms and what i've done to try and figure this out:

When started and idling there is no noise!
put the truck in gear still no noise
in park when u give it gas loud knockin sound i cannot pinpoint.
also when accelerating while driving u hear this knockin.

Things i've done to try figure it out:
i've drained oil thru rag. (No metal found)
I've took cover off bottom of flywheel (all bolt to torque converter was tight)
i couldn't get to bolts to motor from flywheel without pullin tranny
I've let a mecanic look at it and they had someone unplug one injector at a time to see if they could pinpoint if it was a rod but this made no change in the sound.

Idk what eles to do it sounds like crap driving down the road.
Some say could still be a rod, some say cracked flywheel,
some say timing chain tentioners. ( sounds like its comming from underneath someplace.

All shops wanna tear into it to figure it out witch can cost$ $$$.

Any help/ideas would be great!

 

I think you mean grand???? If so u might have better luck in the grand Cherokee section.

 

Yea, sorry im new here

 

Idk how to go there to that section sorry maybe ill still get help here

 

A mod will move it there soon.

 

So am i lol. They will move it soon.and u should.get help this.forum is awesome and everyone is nice

Sent from my SAMSUNG-SGH-I897 using Cherokee Forum

 

Cracked flywheel or bad bearing. If u have oil pressure, keep driving it until it leaves you stranded...or a full repair is in your future...g/l

 

What weight oil, and how many miles?

Ron