I have a 2000 Jeep Wrangler with roughly 160K miles. Recently I let it sit for a week and after sitting, I cranked it & it had developed a "tick noise" which sounds like it's coming from the top of motor or the front of the motor. I changed the oil & added 1 quart of resin to it, but the "tick" was still there. I was told to change oil again & add Marvel Mystery Oil, crank it & let water temp raise, then drive for 30 min's. I did this & the tick has very slightly gone away but still remains. I removed oil cap & noise never got louder, I was told to do this & maybe it would be a lifter. Oil pressure stays at 40. The noise does get louder at high rpm's.
I've been told its not a exhaust leak, I have noticed a loss in power (I think, haven't been in Jeep for 3 weeks) so it seems slow. I was told it couldn't be a loose rocker arm also.
The noise can sound like its coming from under the timing cover too. Could there be anything in there slapping against anything? Saw tonight it could be a oil pump?
Im open to any & all suggestions. Im gonna pull valve cover off this upcoming weekend, but wanted all opinions before before hand, maybe some have seen or heard of this. THANKS in advice.
Try to add some SeaFoam to your oil. It could be your lifters.
What is the best sea foam? I went to local Auto parts store & only saw a 1 gallon jug? And fuel addictive. Im planning on running Marvel oil another 100 or so miles & then change & add this sea foam addictive. I would ask guys at local store but very poor service & very little knowledge too.
So I should do this for a stuck lifter? Because this is a first for me..
I was just showing you how to use seafoam. A ticking noise could be a stuck lifter. If you want, you can take off the valve cover, intake, exhaust, and head to find out, but that would take some time an patience. I have only had one vehicle to have a ticking noise, an 1987 mustang. I just rebuilt the motor and a lifter didn’t expan like it should have, and it was kinda loose. It got better after doing the same thing you did, the Marvel Mystery Oil. It still did not quit ticking. It was faint. I had that car revving over 6k RPMs and no problem for over a year or so. It’s still doing fine. If it bothers you, fix it. If not, look up on it some more and let it pass. My .02.
I had this issue for a long time in my jeep in the lower RPM range and when climbing hills, it was definitely a valve noise, kind of a metallic tapping noise? Anyway, I did a tune up few weeks back, and I replaced every thing in the ignition line (wires, cap, rotor, coil, and plugs), and i turned it over again and noticed a smoother engine, more powerful and more efficient, and it just occurred to me last week that I am no longer hearing the valve noise! I had begun to ignore the noise thinking I would have to do a valve job eventually, but I think a spark plug was misfiring and causing the valves to not lift properly. My old plugs were at 45 due to wear, and were supposed to be at 35. I think that may have been the problem
To clean and quiet the valve train and hydraulic tensioners inside the engine add 1˝ oz. Sea Foam to each quart of crankcase oil. Sea Foam will slowly re-liquefy the old oil residue that builds up on lifters, hydraulic tensioners preventing them from functioning normally. This process can be done as part of a pre service cleaning by adding the Sea Foam to the oil at least 30 to 100 miles before the next oil change interval. OR it can be done as a preventative maintenance process without changing the oil. You can leave Sea Foam in the oil indefinitely as long as the oil is clean. The addition of a high-detergent oil like Sea Foam may cause the oil to become dirty faster than normal as buildup oil residue and contamination are cleaned. Check the oil at regular intervals and when it gets dirty, change it.
I just did this on my rig. I added the SeaFoam to the engine like I was topping up the oil about 50 miles before I changed the oil. I didn't notice any difference when driving around. (I don't know if it did what I was hoping it would, yet, as I was trying to clean out deposits that might be harboring old coolant. I'll find out in another 500 miles when I do my next oil change. 0331 cylinder heads suck.) And yes, the same stuff can go in your gasoline or your oil. It's for both. And the whole "dump into a vacuum line" won't help a stuck lifter, that's for cleaning out the intake manifold and your valves. I bought a 16oz bottle from the parts store. It takes about 2/3 of the bottle for the 4.0s oil capacity. I dumped the excess in my gas tank and burned it as fuel.
Does your jeep have a power pack?? Some 4.0's are made with what people call a power pack it won't have a distributed cap or wires it will look like a cover over the spark plugs.. They are still good engines but what sometimes happens with them is a push rod bends and it will create a ticking noise i's solve it quick because if one breaks the rocker spring could do some damage if that decompresses and shoots somewhere