Engine tick 3.8L - JeepForum.com

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post #1 of 26 Old 05-28-2013, 09:51 PM Thread Starter
BadBarret
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Engine tick 3.8L

Looks like I need some help again I have an 07 Wrangler 6sp(47k miles), and there seems to be a ticking from the engine. It only happens after it warms up and you can hear it good between 1k-2k rpm (may happen at higher rpms but it's harder to hear) It could just be something loose vibrating but I'm not really sure. Was just curious if any others have had this issue and if so what the solution was. Thanks for any help!!

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post #2 of 26 Old 05-28-2013, 11:01 PM
RockyClymer
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Is the tick related to the rpm of the engine or not?

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post #3 of 26 Old 05-28-2013, 11:42 PM Thread Starter
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Originally Posted by RockyClymer View Post
Is the tick related to the rpm of the engine or not?
No tick at idle, starts at 1k and and seems to stop between 2-3k
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post #4 of 26 Old 05-29-2013, 04:52 AM
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If you rev it while sitting still, does it tick?

^^Jeff^^
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post #5 of 26 Old 05-29-2013, 05:44 AM Thread Starter
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Originally Posted by JTPhoto View Post
If you rev it while sitting still, does it tick?
Yes it does
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post #6 of 26 Old 05-29-2013, 08:10 AM
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Again, does the ticking frequency increase with increasing rpms?

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post #7 of 26 Old 05-29-2013, 08:24 AM
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Wonder if this may be injector noise.
Does it sound like it is coming from the top end? Left, Right, both sides?
With an automotive stethoscope you may be able to pin point the noise.

^^Jeff^^
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post #8 of 26 Old 05-29-2013, 09:37 AM
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Quote:
Originally Posted by JTPhoto View Post
Wonder if this may be injector noise.
Does it sound like it is coming from the top end? Left, Right, both sides?
With an automotive stethoscope you may be able to pin point the noise.
or just use a section of hose ie. few feet of garden hose lenght of heater hose. cheep it works.

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post #9 of 26 Old 05-29-2013, 12:33 PM
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1) Does it go away when you step on the clutch?


2) Unrelated to the above question, What weight oil are you running?

5-20 is the recommended, but it permits a lot of valvetrain noises.

I switched to 5-30 and things got a lot quieter.

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post #10 of 26 Old 05-29-2013, 01:02 PM Thread Starter
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Quote:
Originally Posted by RockyClymer View Post
Again, does the ticking frequency increase with increasing rpms?
Sorry, yes the frequency increases with the rpms.

Switched to 5w-30 last time I did my oil, however does not seem to have helped.
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post #11 of 26 Old 05-29-2013, 05:20 PM
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My guess is a hydraulic lifter is not filling...

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post #12 of 26 Old 05-29-2013, 05:58 PM
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Only happens between certain RPMs, could be a loose heat shield. Although that's more often described as a buzz or rattle.
Can you post a sound or video file (or link to youtube)?
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post #13 of 26 Old 05-29-2013, 06:13 PM Thread Starter
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Quote:
Originally Posted by Jiblet View Post
Only happens between certain RPMs, could be a loose heat shield. Although that's more often described as a buzz or rattle.
Can you post a sound or video file (or link to youtube)?
You know, now that you mention it it could be a rattle. Is there anyway to post sound clips from the jeepforum app?
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post #14 of 26 Old 05-29-2013, 06:17 PM Thread Starter
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Quote:
Originally Posted by BadBarret View Post

You know, now that you mention it it could be a rattle. Is there anyway to post sound clips from the jeepforum app?
But wouldn't a rattle happen all the time whether the engine is hot or cold?? Ugh so frustrating, I keep second guessing myself...
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post #15 of 26 Old 05-29-2013, 06:36 PM
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A heat shield rattle can be sound dependent (sympathetic vibration) from certain tones of the exhaust.. Very hard to identify sometimes.

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