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Old 03-30-2012, 12:28 PM
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Gotta Ask: 5.7 HEMI Engine Noise?

OK, I posted yesterday about my new Header Orange R/T purchase & I noticed an (engine?) noise I heard while on the inspection drive with the salesman, & it remains after the 350 mile trek home. Seems when the RPM's go up - like starting at around 3,000 RPM, I'm hearing what I would describe as a lifter tapping/knocking noise. We then drove another R/T stick car & I did not hear it - it sounded like all engine - a sweeter sound than my car. Almost sounds a little like a solid lifter engine sound.

I called my buddy who is a test driver & designer for Chrysler & he said he has heard a sound like that on many of the hemi cars he test drives. He was going to check into this some more for me & let me know. So i ask you Challenger 5.7L folks, do your engines sound like what I am describing? Is this just an inherent sound these engines make? I ask because it does sound unusual to me & I have a 2012 Ram Hemi, & had a 2006 Ram Hemi, & I don't remember either sounding like this. Man, I hope everything is OK on this car! I can't imagine letting a dealer mechanic do major work on this car...
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Old 03-30-2012, 12:44 PM
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you're hearing the "Hemi tick" where some of the lifters are noiser than others.

It occurrs on 5.7 and 6.1 engines - and turns up on some 6.4s.

Some do it, some don't from what I've read about this - mine doesn't.

It may be due to lifters that bleed down too fast and the extra clearance makes the noise.
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Old 03-30-2012, 12:51 PM
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Seems hard to imagine that going in with throttle at 3000 rpm, there would be any chance of hearing the Hemi tick or a lifter tick, for that matter. Seems like it would be all glorious engine sound or exhaust sound. If there is a repetitive clacking sound during that scenario, I would suspect it is just the cackle of the engine through the stock perf-core mufflers.
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Old 03-30-2012, 01:02 PM
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I have it too. Brand new 2012 R/T and it sounds just like Powerstick says....a solid lifter engine. Its so bad in mine that just today a friend asked if I have checked the oil in my car. I like it sometimes and other times I want it gone. Maybe a warranty issue?
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Old 03-30-2012, 01:20 PM
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my new 2012 ticks all the way though the rpm band 900 miles on it now.
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Old 03-30-2012, 01:29 PM
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Originally Posted by randycat99 View Post
Seems hard to imagine that going in with throttle at 3000 rpm, there would be any chance of hearing the Hemi tick or a lifter tick, for that matter. Seems like it would be all glorious engine sound or exhaust sound. If there is a repetitive clacking sound during that scenario, I would suspect it is just the cackle of the engine through the stock perf-core mufflers.
Randy, I know my cars & I'll assure you, this is not an exhaust noise - it's engine related. I have the dealer checking into this to see if there is a TSB for this symptom, plus a couple folks at Chrysler. If it is nothing to worry about, I want to know - I can live with it. But if it is something that will cause issues over time, I want to take care of it.

-Eric
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Old 03-30-2012, 01:32 PM
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Mine was pretty noisey at idle outside the car. Seemed like right front engine. Didn't hear it inside. Got much quieter after 500-600 miles though.
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Old 03-30-2012, 01:35 PM
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No worries, Powerstick...you should get something like that checked out. I was just trying to speak to the notion that such a noise is not typical for a normal running Hemi, IMO.
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Old 03-30-2012, 01:48 PM
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I have that same tic sound in my engine. I have a six speed and it is noticeable at idle and low in the RPM range 1700-2000. Some days its worse than others. When I remove the engine cover the tapping noise appears to be coming from the valve covers.

Prior to the Challenger I had a Charger with the 5.7 engine and it was the same way. I took it back to the dealership thinking, no new car should sound like this. The service manager had one of the techs run a complete diagnostic check on the engine and he didn't find anything wrong. He advised me that he heard several Charger owners mention the Hemi tapping sound. I guess its something some of the 5.7 engines have.

Take it to a local dealership or some one you can trust and have the noise checked out they might find something. If they find something wrong please post it on Challenger Talk.
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Old 03-30-2012, 01:51 PM
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Mine makes a "ticking" sound. It was annoying to both my husband and I when we first got the car. Now I'm so used to it so I don't notice it much anymore and I was told that all Hemi's tick. I'll have to pay attention next time I drive because I think I only notice it when not accelerating.
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