06 GC Hemi engine ticking - JeepForum.com

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post #1 of 21 Old 03-11-2007, 04:57 PM Thread Starter
vtbert3
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06 GC Hemi engine ticking

I have a 06 GC Limited with the 5.7. It has 24k miles on it and it has a tick that sounds like it could be a lifter. Is this a common problem in the Hemi's with the MDS collapsing lifters? It seems to be at its worst in 2nd, 3rd at about half throttle acceleration. Any help?

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post #2 of 21 Old 03-12-2007, 02:49 AM
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When MDS is operating, that's exactly the sound you'll hear...sounds like a sticky lifter and like the engine isn't running on all 8 cylinders. And with the speeds you'd be travelling in 2nd and 3rd gear at light enough throttle for MDS to operate, it's pretty easy to hear the MDS operate...not enough wind noise & road noise at those speeds to drown out the MDS sound.

You don't mention if you just got the vehicle and you're just trying to confirm the sound or if you've had the vehicle for a while and the sound is new. My initial take is that it's totally normal, unless you've had the vehicle for quite a while and are just now hearing the noise.

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post #3 of 21 Old 03-12-2007, 06:13 AM Thread Starter
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Thanks for the reply. I did leave out that if I do floor it it gets quieter but it is still there, just faint. So it makes me think that maybe there is a problem with a lifter or lifters not fully expanding when MDS is off. I have seen that many hemi charger owners have this ticking as well, so I guess it makes sense that I have it too. It just sounds like crap when I am putting around town, almost exactly like an exhaust leak. Oh well, I don't know if it is really worth a tear down of the engine.
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post #4 of 21 Old 03-12-2007, 06:16 PM
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Unless it's really bad, I wouldn't worry too much about it. A side effect of the collapsible lifters is that they are noiser than regular hydraulic lifters, even when MDS isn't operating. I wouldn't go so far as to call it a problem...nothing's wrong with them. It's just the way they are.

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post #5 of 21 Old 03-13-2007, 12:20 PM
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I hear the same thing .. What it sounds like to me is a exhaust leak .. I hear it worse when next to a wall or on take off . But today I decided to turn off the traction control .. And the noise almost went completly away .
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post #6 of 21 Old 03-16-2007, 02:26 PM
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I had a Hemi w/o MDS, the highly acclaimed 4.7 toyota V8, and now a 4.7 XK...they all had/have a little ticking sound occasionally. Sometimes at idle, sometimes under light acceleration, etc. Never had a real problem with them, all ran great and I was told this was 'normal' by the techs.
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post #7 of 21 Old 04-08-2007, 07:57 AM Thread Starter
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Ok, results are in and Chrysler SUCKS!!!! Took the GC Hemi to the dealer explained the problem (eg. it's not the Hemi idle tick, it happens when under load and it's not normal for an engine to make this noise if its parts are in tolerance.) So, the tech drives it, hears the noise when under load and they actually have the nerve to tell me "it's normal for that engine."??? So, FYI, the dealer seems to think it is ok for a hemi to sound like a diesel when accelerating. Ridiculous!!!!!!
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post #8 of 21 Old 04-08-2007, 11:53 AM
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From what a friend of mine says his HEMI (2005 Dodge RAM) had a tick in it. Than he did an engine flush and switched over to fully synthetic 5w20. Hes running AMSOil (so am I, great stuff), but Iím sure some thing else like Mobile 1 or Royal Purple will work.

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post #9 of 21 Old 04-08-2007, 02:51 PM
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No ticks on our '07 Hemi but I changed oil to Mobil One at 3,200 miles (has 5,500 miles now).
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post #10 of 21 Old 04-08-2007, 07:00 PM Thread Starter
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Quote:
Originally Posted by jeep_on
From what a friend of mine says his HEMI (2005 Dodge RAM) had a tick in it. Than he did an engine flush and switched over to fully synthetic 5w20. Hes running AMSOil (so am I, great stuff), but I’m sure some thing else like Mobile 1 or Royal Purple will work.
Yeah, i am using mobil 1 5w20 extended performance, made no difference in ticking.
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post #11 of 21 Old 04-10-2007, 07:50 PM
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Quote:
Originally Posted by vtbert3
Yeah, i am using mobil 1 5w20 extended performance, made no difference in ticking.
Did you figuar it out yet? I hav't really done much to a HEMI. The biggest thing I've done to one was help change 16 effing spark plugs. Maybe that could be your problem? Theres only so many thin it could be.

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Last edited by jeep_on; 04-11-2007 at 07:57 AM.
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post #12 of 21 Old 04-11-2007, 06:37 AM
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Quote:
Originally Posted by vtbert3
Ok, results are in and Chrysler SUCKS!!!! Took the GC Hemi to the dealer explained the problem (eg. it's not the Hemi idle tick, it happens when under load and it's not normal for an engine to make this noise if its parts are in tolerance.) So, the tech drives it, hears the noise when under load and they actually have the nerve to tell me "it's normal for that engine."??? So, FYI, the dealer seems to think it is ok for a hemi to sound like a diesel when accelerating. Ridiculous!!!!!!
you should have pulled the tech in another Hemi GC at the dealership, and drove that around. if there's an obvious difference, then you may have a problem.

the annoyance of ticking is quite subjective. Although everyone will agree there is a ticking noise (I have it too), tolerable ticking is up to the individual. good luck.

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post #13 of 21 Old 04-11-2007, 09:43 AM Thread Starter
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Quote:
Originally Posted by anerbe
you should have pulled the tech in another Hemi GC at the dealership, and drove that around. if there's an obvious difference, then you may have a problem.

the annoyance of ticking is quite subjective. Although everyone will agree there is a ticking noise (I have it too), tolerable ticking is up to the individual. good luck.
I have driven other Hemi vehicles and they do not make the noise that mine does, nor has any other vehicle I have driven. I am ok with a little tick when idling, however, that is not the case here. It sounds very similar to a spark knock or an exhaust leak that does not get louder, however, it is not a spark knock or an exhaust leak. The dealership knows there is something wrong. They said that had a jeep in before with this "problem" and they were not sure what it was so they replaced the exhaust manifolds and it did not fix the problem so that was the end of their investigation because they def did not want to go through the engine when they would receive no income for doing so. My bets are placed on either a faulty MDS lifter or exhaust valve guides that are slightly too large. I cannot say whether the cause of this noise will eventually kill the engine, however, it is not a "normal" engine noise and it is quite annoying.
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post #14 of 21 Old 04-12-2007, 12:04 PM
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try another dealership - perhaps they didn't want to pay, since they already spent money on trying to fix a problem.

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post #15 of 21 Old 04-15-2007, 07:56 PM
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Mine ticks like crazy at idle. I am a professional engine mechanic so I am extra sensative to noises and things. I WILL ONLY use Mobil 1 fully synthetic 5W20 im my hemi. Anyway, the ticking probably wouldnt bother most people but I hear it and am learning to ignore it. I know there are some intricate parts in there so I just chalk it up to a new sound coming from new parts. Mine is pretty quiet once I get rolling, even beside curbs or walls. I reciently had what I think was a catalytic converter problem that made a lot of noise while running. Did that for 4 days and on the 5th when I was to take it to the dealer... it quit and has not made a peep again. I'd suggest you go to local auto parts store and buy a mechanics stethascope and listen around.

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