James6378

Hey guys,
Newbie here! Same old story...habitual lurker, first time poster...

Car details: 2000 Jeep Grand Cherokee Laredo. 4.7, 195k miles. My Jeep recently started making this noise:


That's not my Jeep, but the noise mine is making is IDENTICAL to that one.

I've scoured the net and this forum, and I'm finding two general things that the consensus says it might be:

1. A faulty/broken lifter.
2. A broken piston skirt.

What do you guys think? Some stuff I'm reading says that it's more than likely the lifters, and that other than being annoying, no real harm is being done. Others are saying that it could be a rod or something else gravely serious, and my engine might be ready to self destruct. So for right now, the Jeep is sitting in my driveway, just to be safe.

So is it something I need to get repaired ASAP? If so, any idea on cost if I take it to a mechanic?

Sorry if these are rendundant questions. Like I said, I'm new here, so please be gentle!

Thanks!
James

freegdr

to me that sounds more like a exhaut leak its quiet on the pass side noiser on drivers rods usually are more of a knock than tick

Garvin

An exhaust leak would be making more of a popping sound than a tapping sound. That sounds more like a lifter or pushrod issue. I had a similar noise coming from my 2.8L V6 (different engine but same internals), it ended up being two bent pushrods and a collapsed lifter.

freegdr

push rods and lifters are on passenger side where its quiter

ol"blue

That video doesn't help because it's a different type of engine entirely.
Does this sound like yours at all? And Welcome to CF.

freegdr

this may sound funny and you look a little strange doing it get a three foot pc of hose garden hose works the best start motor and stick one end to you ear the other end move it around untill you pin p[oint the noise it works

CenCaliAlum2010

x2 on the automotive stethoscope. It also works with a screwdriver cupped to your ear and then put the other end up to places on the block. It's an oldschool trick so don't worry about looking bad, a true mechanic whether home or pro would know what's up!

Sometimes if you take off the oil cap for a short moment while the engines running you can hear the lifters rattling away more clearly, and if one is collapsed I could imagine it would making some real racket. In my lil 4-banger you can even shine a light in and see all the lifters doin work to make a quick visual inspection.

wildspear

i vote for a bad wrist pin. I had a bad knock and the wrist pin broke and blew the piston to peices....engine still ran enen with number 4 piston in peices in the oil pan...go jeep

freegdr

this works also but the hose will bend around and under and you can see better were you listening

kpalmese

i agree with the wrist-pin my is doing the same i thought it finally blew up bot its not getting hot and still has pressure and not burning oil AND ITS STILL RUNNING and wtist pin finally broke and metal piesces but i totally agree with u man

peep

Well the vid is not your engine.
Worth your while to pull the cover off front lower of trans and check to see if flex plate bolts are tight to torque convertor. They can get loose and rattle like a snake. If not corrected one day it will bite your rig.

DFlintstone

Waz mine, I'd pull the valve cover and take a peek. Rocker pivots can mess up. A tube to your ear with the other end in the oil filler hole might be enlightening.