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    blkrubi88's Avatar
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    Question Replacing lifters in 4.0?

    I have a lifter that is ticking. Replacing the lifters, does the head need to be removed or not? Any advice will be helpfull.

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    Re: Replacing lifters in 4.0?

    Head should not need removed. Have you tried replacing a quart of oil with a quart of ATF? You may be pleasantly surprised.

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    Re: Replacing lifters in 4.0?

    Yes.
    Confucious says: Don't eat the snow where the huskies go!

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    blkrubi88's Avatar
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    Re: Replacing lifters in 4.0?

    Quote Originally Posted by Bounty__Hunter View Post
    Head should not need removed. Have you tried replacing a quart of oil with a quart of ATF? You may be pleasantly surprised.
    Will this possibly fix the lifter that is ticking, or is it a band aid fix that will just make it not so noisey? I`m almost due for my oil change anyway, willing to give it a try. I use royal purple oil, so do I use syntheic atf? I`m not a mecanic. I didn`t even stay at a holiday express last night either.(lol)

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    Bounty__Hunter's Avatar
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    Re: Replacing lifters in 4.0?

    My trusted mechanic does it to the 4.0L in his wife's Grand Cherokee. He originally narrowed it down to a certain lifter, and rotated that lifter 90º. It was quiet for a while, then the noise returned. Now he uses the ATF and the noise has gone away for good.

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    Re: Replacing lifters in 4.0?

    Quote Originally Posted by Bounty__Hunter View Post
    My trusted mechanic does it to the 4.0L in his wife's Grand Cherokee. He originally narrowed it down to a certain lifter, and rotated that lifter 90º. It was quiet for a while, then the noise returned. Now he uses the ATF and the noise has gone away for good.
    Thanks for the your input.I will give it try hopefully this weekend and post my results. So when your mechanic rotated the lifter 90 degress, was he able to do that without removing the head?

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    Re: Replacing lifters in 4.0?

    The pushrod should stay "stuck" into the lifter - if you pick it up so the lifter is off of the cam it probably will turn. BUT... The cam lobes are supposed to be slightly tapered so they turn the lifters while the engine is running. If you run the engine without the rocker cover you can often see the pushrods turning (blow out all dirt in the engine bay first so the fan doesn't get it into the engine. Yes, some oil will fly around but it's not too bad for a minute). If the cam is worn this taper could be nearly gone. The lifter bottoms (which ride on the cam) are supposed to be slightly convex - NOT flat. If you take two of them bottom to bottom they should rock slightly. If not, they are worn out.

    A long time ago I had a Dodge Coronet with stuck lifters and got most of them freed up using Mystery oil (one quart in place of one quart engine oil). It took a few times but most of the lifters got quiet. The ATF might be safer to use (Mystery oil is pretty thin). After freeing them up I went back to regular oil. Best of luck - John

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    blkrubi88's Avatar
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    Re: Replacing lifters in 4.0?

    [QUOTE=Crazy4diesels;214418]The pushrod should stay "stuck" into the lifter - if you pick it up so the lifter is off of the cam it probably will turn. BUT... The cam lobes are supposed to be slightly tapered so they turn the lifters while the engine is running. If you run the engine without the rocker cover you can often see the pushrods turning (blow out all dirt in the engine bay first so the fan doesn't get it into the engine. Yes, some oil will fly around but it's not too bad for a minute). If the cam is worn this taper could be nearly gone. The lifter bottoms (which ride on the cam) are supposed to be slightly convex - NOT flat. If you take two of them bottom to bottom they should rock slightly. If not, they are worn out.

    A long time ago I had a Dodge Coronet with stuck lifters and got most of them freed up using Mystery oil (one quart in place of one quart engine oil). It took a few times but most of the lifters got quiet. The ATF might be safer to use (Mystery oil is pretty thin). After freeing them up I went back to regular oil. Best of luck - John[/QUOTE)




    Thanks for the advice. I`ll see what happens with the ATF.

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    Re: Replacing lifters in 4.0?

    Do you just leave the ATF in the oil until the next oil change or do you have to run the engine for a certain amount of time then change the oil out again and replace with new oil? I may try this also
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    carnuck's Avatar
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    Re: Replacing lifters in 4.0?

    leave it in. Not much different than 5W30 oil. I prefer CD2 engine detergent in mine

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    Re: Replacing lifters in 4.0?

    I too have used Marvel Mystery oil to loosen up sludge deposits and free up a stuck lifter.

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    Re: Replacing lifters in 4.0?

    Leave the ATF in.

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    Re: Replacing lifters in 4.0?

    Lifter update!!
    Well I changed the oil yesterday. Replaced 1 Qt. oil with Lucus oil stabilizer. The ticking is still coming and going. I used Lucas because
    I read good stuff about it. Maybe my lifter that is ticking every once in awhile is almost wore out.

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    Re: Replacing lifters in 4.0?

    It was stuck in one spot for a long time and is rotating too slowly. The high spot is when it doesn't click and the low spot is where it does click. Eventually the crud slowing down the spinning will clear out and the noise will get even quieter.

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    Re: Replacing lifters in 4.0?

    Quote Originally Posted by carnuck View Post
    It was stuck in one spot for a long time and is rotating too slowly. The high spot is when it doesn't click and the low spot is where it does click. Eventually the crud slowing down the spinning will clear out and the noise will get even quieter.

    Thanks for the info. I have about a month to month and a half before I would have free time to replace if needed, so maybe it will clear out by then.

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    Re: Replacing lifters in 4.0?

    I had the same problem in my 85 CJ7, lifter tick was driving me crazy and no pour in remedy was fixing it. I've not had the valve cover off of a 4.0 so I don't know what the differences are but on the head for a 258 there is no passage to the lifter bores in the block. So I had to pull the head.

    The hardest part was getting the exhaust and intake back on but it's not really that bad. While the head is out lay down some plastic, put on some rubber gloves and attack all of the built up crud in the head with a stiff bristle brush and a bucket of Kero (wear goggles). I went so far as to pull the valves, had the head cleaned and put everything back together with new valve guides.

    Some say to soak your liters in oil for a few hours before you install them, others say that you don't have to. I chose to soak mine with no problems.

    I put everything back together, fired her up and voila... no more tick.

    To help keep sludge from building up I drop in a quart of diesel or a quart o Kero (which ever I have around) and let the engine idle or 15 or 20 minutes. I even take mine on a short easy drive. Drain your oil and refill. I've used the old trick of replacing a quart of engine oil with a quart of ATF, it's a good practice as the additional detergents will help to clean out sludge while you drive.

    Plan a full day, longer if you are stripping the head to have it cleaned.

    Good luck!

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    blkrubi88's Avatar
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    Re: Replacing lifters in 4.0?

    Thanks! I was told today that the ticking still might go away, just have to drive it awhile. So maybe by the next oil change it will be gone! I hope!!!

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    Re: Replacing lifters in 4.0?

    one other option: Pull the valve cover, find the offending rocker and with the motor idling, gently tap on the pushrod side of the rocker (with about the same force you could hit your finger with and not hurt)

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    Re: Replacing lifters in 4.0?

    Quote Originally Posted by carnuck View Post
    one other option: Pull the valve cover, find the offending rocker and with the motor idling, gently tap on the pushrod side of the rocker (with about the same force you could hit your finger with and not hurt)
    Thanks for the advise!
    I will keep that in mind and maybe try that before replacing.
    I still plan on giving it to the next oil change to see if it gets
    better on it`s own!

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    Re: Replacing lifters in 4.0?

    Sometimes the tapping knocks loose the bit of crud blocking the oil gallery and silences the noise.

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