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Old 01-26-2014, 04:06 PM   #1
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lifter replacement questions

I am looking at replacing the lifters in my jeep but I have a few questions before I do so. I have been looking on the forums and web and have a general understanding of this procedure.

I have an 05 TJ 4.0. It has a tap and im pretty sure its a lifter. so I am going to replace them all. while im in there I will be looking at the cam to see if I can get by with using the old one or not. I will be using prelube. here are my questions

1. I replace all the lifters, I go ahead and replace the pushrods with new ones as well. is there any special set up I need to do to the valve bridge, pivot and rocker arms because I replaced the pushrods also?

2. If I do need to replace the cam, does this make any special set up to the valve train necessary?

3. What is the best what to break in the new parts? just the lifters and rods, and the lifters, rods, and cam?

4. Whats some good brands to go with for an 05? (im have ALOT of trouble finding ones for 2005 for some reason. idk the specs so idk if another year would work on it)

5. good gasket kits? im looking at felpro from my previous research.


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Old 01-26-2014, 04:26 PM   #2
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I had an machine at uncle now passed away who swore havoline oil fixed stuck lifter ever time it was tried

Once had one in a stang and one oil change with havoline fixed it

Had my doubts on his claims but was one for one when I actually tried it

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Old 01-26-2014, 04:34 PM   #3
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Machinist uncle
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Old 01-26-2014, 04:37 PM   #4
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I wont be doing the work tll spring so I think ill try it before I do it. its worth a try. im kinda agains sea foam and other additives but just an oil im good with. thanx for the tip!
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Old 01-26-2014, 04:39 PM   #5
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Why change the push rods? Just keep them in order and put them back, you won't know until you look at them.
I wouldn't replace them unless mushroomed.
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Old 01-26-2014, 04:41 PM   #6
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I was just going to do it because I was in there and they are cheap. but I it makes more work down the road as far as set up goes than I might shy away from it if they are in good condition
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Old 01-26-2014, 05:08 PM   #7
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I also have a 138K on my rig
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Old 01-26-2014, 08:31 PM   #8
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Have you replaced the OPDA?
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Old 01-27-2014, 04:25 AM   #9
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No I have not personally, the person before me had it changed at about 75k at the dealership because its on record with the vin number
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Old 01-27-2014, 03:54 PM   #10
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Ok, sometimes they can make noises as well as the lifters.

Some lifter noise is normal on the 4.0, but I seem to remember several cases of premature cam/lifter wear for some '05s.

You'll need a good high ZDDP break in oil for the cam/lifters.

FSM and parts listings available here: Jeep Information Center, Jeep Parts Catalog, Jeep Repair Manual & More

Check the OPDA gear while you're at it. Since they replaced it with the Mopar one, it will go out again.
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Old 01-27-2014, 04:40 PM   #11
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thanks for the link! I wonder if I do the cam and lifter if I could get another 136K out of the 05 4.0. still tho anyone know how much preload to set on the new lifter ( and possible cam and rods) or just torque the to spec and good to go?
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Old 01-27-2014, 04:48 PM   #12
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I've got over 250K on the YJ and over 115K on the TJ.

YJ motor has had the rear main and oil pan gasket replaced. Also replaced the distributor because a complete distributor was as cheap as the internal sensor.

Replaced the OPDA on the TJ at around 115K due to the sensor failing.

Other than that, no internal engine work done.

It should go over 200K easily. Just keep an eye on the OPDA.
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Old 01-27-2014, 05:01 PM   #13
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could a failing OPDA cause the lifters to tap?
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Old 01-27-2014, 05:06 PM   #14
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I don't think so. It just runs off the cam gear. It can squeal if the bushing is dry, or maybe tap the housing if the shaft is wobbling.

You can put your hand on the OPDA while it's running and see if the target wheel is contacting the housing.
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Old 01-27-2014, 05:11 PM   #15
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im pretty sure the lifters, and maybe the cam is bad, I have never done this work before some im trying to harbor as much info as I can before I go into it
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Old 01-27-2014, 07:03 PM   #16
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im pretty sure the lifters, and maybe the cam is bad, I have never done this work before some im trying to harbor as much info as I can before I go into it
If your thinking of replacing the lifters and not the camshaft you'll ruin the cam. When a camshaft is first broke in it wears with the lifters they are now mated, replacing the lifters with the old camshaft will ruin your day.
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Old 01-27-2014, 07:09 PM   #17
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I would like to do the cam but I'm not confident enough yet, I'm trying to get enough info on it
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Old 01-27-2014, 07:32 PM   #18
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I would like to do the cam but I'm not confident enough yet, I'm trying to get enough info on it
It's not as difficult as you would think, it's all about setting the timing at Top dead center removing the gear and chain then camshaft. That's after pulling the head and lifters then just reinstall in reverse order, Torque to proper settings and break it in. Do your homework it's not that bad, if your comfortable doing the lifters you can do the cam also.
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Old 01-27-2014, 07:56 PM   #19
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Is there a way to set preload with the new lifters and cam? Or just torque to spec and roll with it?
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Old 01-27-2014, 07:56 PM   #20
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You're going to have to pull the head to get the lifters out. That's going to be the worst part. Just follow the manual.
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Old 01-27-2014, 08:19 PM   #21
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Is there a way to set preload with the new lifters and cam? Or just torque to spec and roll with it?
Just torque in sequence, I'm not sure what you mean saying set preload with new lifters.
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Old 01-27-2014, 08:31 PM   #22
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Like setting the lash?
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Old 01-27-2014, 08:46 PM   #23
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Just soak the new lifters in oil for an hour or so drop them in followed by the push rod tubes then set in rocker assembly and torque in sequence 3 times until you get to the proper torque.
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Old 01-27-2014, 10:51 PM   #24
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Lash is set by the valve stem height from the factory.
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Old 01-28-2014, 05:41 AM   #25
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I'm prolly going to start buying my parts slowly soon. What kind and brand or assembly lube so you guys recommend, non synthetic, synthetic? And a good break in process?
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Old 01-30-2014, 06:44 PM   #26
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Old 01-30-2014, 07:30 PM   #27
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I'm prolly going to start buying my parts slowly soon. What kind and brand or assembly lube so you guys recommend, non synthetic, synthetic? And a good break in process?
Any assembly lube will do.Cam break in just start engine run for about 20 minutes at 2000 rpm, change oil check for leaks and have fun.
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Old 01-30-2014, 07:47 PM   #28
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The assembly lube is applied to the cam and lifters. Is there any additives I should put in the oil during the break it? Sry noob questions guys also, there is no bearings on the cam it's self correct? They are pressed into the block right?
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Old 01-30-2014, 09:50 PM   #29
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The assembly lube is applied to the cam and lifters. Is there any additives I should put in the oil during the break it? Sry noob questions guys also, there is no bearings on the cam it's self correct? They are pressed into the block right?
Just soak the lifters in motor oil and apply the assembly lube to all the lobes on the camshaft.
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Old 03-28-2014, 09:49 AM   #30
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Update? Have you completed this job yet, and if so what were your results?

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