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@@tm5346 turned out to be a bad battery

I didn't solve it, I just kept driving it. As far as I know it's still out there running around.

@@DualSportDad1 cool, thanks - 4.0s never die

Not for a stock motor, it has no bottom end. I ran a pcv, radiator hose mod and full exhaust with this cam. Maybe with a 143 kit it would be better.

@@DualSportDad1 thanks man,I apriciate your take,I run a finbro ecu ,ransoto pipe, k&n ,stck bore, I'm gona go cam& high comp piston before the 143 ,,the tb is only 70bucks and on its way ,,il probably end up whith a neo ,I luv the blat blat 2v

My 4.7 does it a bit as well in the morning. Engine still runs good tho. I don't let it bother me.

@@DualSportDad1 it's considered normal if it goes away honestly.

Yup, I've had 3 different 4.0 Jeeps over the years and they've all made this noise to some degree. Current one has almost 220k, it quiets down after warming up but you can still hear the tapping if you crawl under. Not too worried about it. GM's had the same issue with some of their LS engines and most people who own them seem equally unconcerned.

No flex plate, it's a manual trans. If you have a 4.0 wj you should take the oil pan off and see if there is a piston skirt in the bottom of the pan.

@@DualSportDad1I sort of had a derp moment there while posting that comment lol. That's #3 on the list of things to check for on my list. Only reason I didn't check that 1st is the compression numbers and lack of metal fragments in the oil. Compression is stellar for having 240k on it, all of them are between 145 and 155. About to pull the valve cover now and put new rocker arms and push rods in after I run it with the cover off for a minute to look and listen for anything abnormal. I assume it ended up being the piston skirts in your case? I have a couple videos up on my channel as an example of the noise

@@TOO_RAW nope this was normal piston slap, it never caused a problem. I did up up with a WJ that had a4. 0 and a skirt was broken, drove fine and had great compression.

@@DualSportDad1 that's crazy man hahaha. I found a bent pedestal mount on cylinder 5 just now and a slightly out of plumb push rod, working on getting her put back together now fingers crossed that's what the problem was. Hard to believe the only symptom of a broken piston skirt was noise but that's the 4.0 for ya. Noisy and fuel drinking mofos but if you got a good one they'll run forever

@@TOO_RAW I just listened to your videos, that is a heavy knock, check the skirts. Mine sounded like a rod knock. Set of power seal pistons and you'll be good as new.

Did you stop for a few seconds and talk to a guy on a dualsport motorcycle? If so that was me. Can't remember, I might have been on my Ulysses. Jane's had some really muddy spots that day, I remember thinking I couldn't believe you came through there on that big bike through that mud.

@@DualSportDad1 I did talk to a guy on an adventure bike, I was trying to decide wether to keep going or turn back. He said I was most of the way through and the roads were about the same. I did find my way to Everglades Rd ( I started at Janes Scenic Rd - no gate back then). I still have the Road King, but have added an R1200gs to the stable. It works much better back there. But I never road it in the water you guys went through !!!!

@@williamreynolds9698 that was me. This is the only photo I got off you that day photos.app.goo.gl/ZjzcG79tVEhb7Gsq8

Thanks, I’ll put that in my “Braggin Rights” album ;) We’re getting our grandson a 100cc pit bike for Christmas, so we’ll be out there after that (R1200gs this time). Keep the videos coming, they’re awesome

@@williamreynolds9698 I haven't been out there for a while, work etc gets in the way. There's a great group of guys that ride out there every Saturday, r1200gs, r800gs, Africa twin, etc. I need to convert my drz supermoto back to dirt trim and get out there. I did take my Uly to Turner river a few weeks ago but I blew out a fork seal on the pot holes.

It did and will continue too lol my 05 Unlimited rubicon has done it always

Same here. Jeep has 450,000km and sounds exactly like this on cold start. Once warm it is very quiet.

Same. She's been mistaken for my bf's 24v when she's cold 😂

Sounds just like mine too. 240,000 and still slapping

Not yet. I have a glass screen protector on it. Unfortunately this will most likely be the last Motorola's flagship I buy.

I tried yesterday to put on my screen protrctor (tempered glass) but it does not adhere correctly on the bottom right side of the screen. The scrren is not an even surface. Unfortunately Motorola is not willing to remove just the upper layer and guarantee to keep the phone under warranty after the operation :-/

the 01 grand cherokees are known for having the piston skirts break. ever pull the oil pan and look in the bottom of the pan for the skirt? i had a 99 wj do this.

Have not, but the next oil change I will fersure! Thanks!

Mine makes this exact noise. It only happens when the engine is cold. It makes the noise up to about 1700 rpm while driving and then it disappears up the rev range. But once it shifts you can hear it again up until you pass 1700 rpms again. But once its warm the noise is completely gone and it runs great.

N o L o v e Media I think what happened is I had the head rebuilt and used to manuals tq spec for the head bolts. I later found out that the manual spec was wrong.

Alex Tuchbaum yeah 43 lbs instead of 34 lbs. I pulled my motor in between then time I comment and now head gasket is out decided to just do a big bore and hot cams while it’s torn apart

Eric Rubio yeah it's picking up a bit here

Don't be fooled by the oil pan noise, the cracked header collecter is two to four inches from the oil pan so confirming where the noise is coming from in this case doesn't do much.

bung cheese if it was a cracked manifold it would get quiet as it warmed up. my header was replaced with up dated one. a friend of mine ownes the Jeep now, still going strong.

Thanks for the reply, my cracked header would start quiet like this, and get louder up to operating temp. I've heard that's the way she goes. Not going away when it's hot, supposed to get worse as it heats up. That's what differentiates the symptoms from piston slap/lifters and a cracked exhaust manifold. Usually..

On further research, people have both experiences. Sound going away when warmed up and sound getting worse when warmed up. Depends on alot of things, clearances changing etc, some parts expand others contract. If it gets quieter when hot then something is expanding and closing the exhaust leak, a crack in a different spot can just as easily expand and open the leak. Could also be piston skirt slap and or lifters of course. This was meant to be a warning for anyone who has a cracked OEM manifold to not jump ship because they assume it's a piston skirt because the noise comes from the oil pan. Just was pointing out that the collector for the headers is adjacent to the oilpan so both have very similar noises and both are coming from the same spot, just something for your viewers to consider.

I am having this same conundrum the last few months. I want to say it is a cracked manifold since there is no noise at all at cold start. Once that manifold heats up after a few minutes, this similar noise appears and then mostly goes away after driving. Deceptive since the air pressure from the exhaust is reverberating right off of the oil pan...if this is actually the case..

Omer Sharif replace chain and sprockets

Kevin Morse I put a lot of miles on it and have since sold it to a friend, who sold it to another friend of mine and she's still going strong with no issues.

Thanks, I just did a cheap rebuild on a used one. And, I re-used the pistons that the coating was wore off of the skirts. I Didn't think to much of that when I was building it, But I didn't have enough money for the pistons any way.

That's good to know. This is the only issue with my Wrangler @117K. It's the same noise, just not as loud. It just needs to make it another 10k-15k the I will have the time to rebuild it.

Be sure to use oil high in zinc. I went from Rotella T6 (5w-40) which USED to have high zinc, to Royal Purp HPS (10w-40) which has plenty of ZDDP. My wife asked me if it was the same engine. So much more quite. The flat tappets no longer sound like a tap dance.

John Hull this is piston slap not tappet noise. oil used was Rotella 15-40.

MrMcaff it's not hard. the hardest part is replacing the sensor, you have to remove the fan and shock.

I sold the Jeep to a friend with about 13000 more miles on it and he's still driving it till this day. I never worried about it. I did however end up buying a 99 2wd XJ to use as a daily driver and it was silent compared to this Jeep.

I like it but I suggest buying better packing cause it blows out fast. I ended up taking mine off and going back to stock with a catless head pipe

ʇɥƃᴉɹlɐ ʇou ɯᴉ 😂😂😂😂😂 ain’t that the truth 😂😂😂😂😂

some cars really do and they do thousands of miles with it

So, it's a feature. Whew, mine is exactly like this sound.

My tj it's banging when I turn the steering wheel with the vehicle parked, I open it and I found a pin broke. I replace it with a oem spartan pin kit and after 50 miles it's doing it again. (D30 front) I'm tired of removing the carrier checking things next time I'm going to install the oem spider gears

@@danielortegamcbo I had much better luck with a Aussie locker.

@@DualSportDad1 ruclips.net/video/wktM6WgePgs/видео.html

+ChuddleBuggy Rod knock doesn't usually go away when it warms up. Piston slap does, because the heat expands it to proper tolerance.

Does your engine still run?

Minds sounded like this for the last few years and at least 50k miles. Hasn’t affected anything at all, I just hate the way it sounds lol. And it always concerns other people but it runs like a Jeep and drives like Jeep, I’m not complaining

@@rawlstonm97 Just crested 214000 miles on mine! I think when I made that comment I was at 140K. Still going strong!

@@mmiller1188 Man, that's a good ole Jeep 4.0 for ya!! 😎

@@digitalchaos1980 6 years later my engine is still happily slapping away. 215000 miles and counting 👌

After a year or so of dealing with this problem I finally removed the locker. I tried to contact spartan repeatedly but never could once talk to anyone, their customer support is nonexistent. At one point the locker broke, all the pins sheared off when I was trying to get unstuck in a mud hole. Broke a axle to. I replaced the springs and pins but the locker still acted the same, jerking and popping through turns medium to tight. Lesson learned here, I'll go with a Aussie next time.

Andrew English what did you do about it ? Still running?

My Spartan on myYJ. D30 is also locked all the time. what gives