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Old 06-09-2010, 10:01 AM   #1
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Cylinder head (remove or not)

Ok so I know I'm planning on doing a lifter replacement. I have a 2003 Wrangler Rubicon 4.0L. Does anyone know (for a fact..like you've actually done this) if you have to remove the cylinder head to get to the lifters???

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Old 06-09-2010, 01:50 PM   #2
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I recently replaced my head and gasket after cracking due to overheating due to a broken thermostat and incorrect temp gauge on my 2000 TJ 4.0. I was told that you could pull out the lifters without removing the head, but the hole where the pushrods go down to the lifters was too small so i had to wait till the head was off, so no. The easiest way to check is to just pull the valve cover and look, it has a reusable gasket so you can just put it right back on.

My question though is why are replacing the lifters? If its because they are tapping or you suspect they are worn then the bad news is you will also have to replace your crankshaft as well because the lobes are worn also and those two parts wear and break-in together and both therefore must be replaced together. Mine werent tapping but where concave which means I should've replaced them however i didnt want to go through the extra steps for the crankshaft and I want a stroker so... when it does go I get to get one.

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Old 06-09-2010, 03:31 PM   #3
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Camshaft not crankshaft, but yes you should replace both at the same time. I am a big fan of Comp Cams.
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Old 06-09-2010, 06:32 PM   #4
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thanks for the input!
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Old 06-09-2010, 07:23 PM   #5
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I will tell you I have seen people put new lifters in and still use the old cam and break in the lifters to the cam just like you were installing new cam and lifters. Seen them go alot of miles without any issues too. Maybe not always the best thing to do but saves alittle money and work . Ask your local machine shop .
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Old 06-09-2010, 07:29 PM   #6
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I might have to do the same thing, because i have been hearing a tapping noise, which i believe is coming from one of the lifters. But i'm not sure which? Any advice on finding which?
Is that why you are replacing yours?
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Old 06-10-2010, 07:56 AM   #7
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yes i believe I have a bad lifter or two. At first i thought it just dirt and gunk around them. Ive tried using seafoam and some marvel mystery oil and still not getting the ticking to go away. The ticking noise is really bad on cold start up but tends to fast away once the engine warms up and the oil is moving better. I also thought it could be a broken skirt but it a ticking noise..not a knocking noise and its sounds to be coming from the top right under the valve cover. once i start work on it, im going to pull the oil pan and check the piston skirts just to be safe.

IF i have to remove the cylinder head to get to the lifters i might as well take another hour to replace the cam as well.

Thanks for the input guys. Let me know if you think my diagnosis is correct.
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Old 06-10-2010, 08:44 PM   #8
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you can install new lifters without a new cam.

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