Engine tick 3.8L - Page 2 - JeepForum.com

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post #16 of 26 Old 05-29-2013, 07:21 PM Thread Starter
BadBarret
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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)?
Hopefully this link works...
Sound quality isn't so great, may have been too close...you can hear it right when I hit the pedal



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post #17 of 26 Old 05-29-2013, 09:05 PM
TXWK131
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I had the same issue after warming up to running temp. I tried different oil and additives with no luck!

Then took it to my tech and he put 10w-40 "diesel oil" with the STP lifter additive and no sound now. But it's just a bandaid...

Im sure I will just replace my lifter when I have time.

2009 SILVER JK Sahara
RC 3.5-315.70.17 on Stock RUBI's
PE Front and Rear Bumper
DIY DECK LID

2006 Navy WK HEMI ~RK 3.5 lift - 17" Moabs - Toyo 265.70.17 AT - Bedliner Paint Job - SOLD

'85 XJ... Still tryin to figure out what the heck I have in this piece of Junk! But you gotta start somewhere
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post #18 of 26 Old 05-29-2013, 09:20 PM Thread Starter
BadBarret
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Quote:
Originally Posted by TXWK131 View Post
I had the same issue after warming up to running temp. I tried different oil and additives with no luck!

Then took it to my tech and he put 10w-40 "diesel oil" with the STP lifter additive and no sound now. But it's just a bandaid...

Im sure I will just replace my lifter when I have time.
So it seems to be just a lifter issue? That's not too bad right? Not to canny on the engine stuff haha. I tried 5w-30 and it hasn't helped.

Will trying 10w-40 have any ill effects until I can get the lifters looked at?
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post #19 of 26 Old 05-30-2013, 05:40 AM
TXWK131
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Quote:
Originally Posted by BadBarret

So it seems to be just a lifter issue? That's not too bad right? Not to canny on the engine stuff haha. I tried 5w-30 and it hasn't helped.

Will trying 10w-40 have any ill effects until I can get the lifters looked at?
I haven't had any ill effects at all, I have gone 12k now with nothing different! Also not burning as much oil as I was either. My tech. said it won't do a thing to it.

2009 SILVER JK Sahara
RC 3.5-315.70.17 on Stock RUBI's
PE Front and Rear Bumper
DIY DECK LID

2006 Navy WK HEMI ~RK 3.5 lift - 17" Moabs - Toyo 265.70.17 AT - Bedliner Paint Job - SOLD

'85 XJ... Still tryin to figure out what the heck I have in this piece of Junk! But you gotta start somewhere
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post #20 of 26 Old 05-30-2013, 10:00 AM
Jiblet
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Quote:
Originally Posted by BadBarret View Post
Hopefully this link works...
Sound quality isn't so great, may have been too close...you can hear it right when I hit the pedal
Hard to say. When its cool, try wiggling the various heat shields. might as well try to rule them out.
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post #21 of 26 Old 05-30-2013, 03:42 PM Thread Starter
BadBarret
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Quote:
Originally Posted by Jiblet View Post

Hard to say. When its cool, try wiggling the various heat shields. might as well try to rule them out.
Damn me! >:l should have listened and tested the heat shields. Just changed to 10w-40 and it still does it...
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post #22 of 26 Old 05-31-2013, 05:07 AM Thread Starter
BadBarret
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Heavier oil has not helped any... I'm ready to give up. Sounds like a vibration but I can't find where :l
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post #23 of 26 Old 05-31-2013, 05:30 AM
Jiblet
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Quote:
Originally Posted by BadBarret View Post
Heavier oil has not helped any... I'm ready to give up. Sounds like a vibration but I can't find where :l
check out:
http://www.jeepforum.com/forum/f96/t...ating-1529762/
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post #24 of 26 Old 05-31-2013, 08:31 AM
OregonVette
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Three things...

You may notice on all jeep/JK forums now that many JKs from 2007-2009 are starting to get this.

1. Heat shields (check the shielding along the transmission cross member area. They are cheap, tiny tackwelds. (should be covered in your power train 2007 warranty)

2. Exhaust manifold crack. Your video doesn't sou d that great but, it did sound like a manifold crack. (should be covered in your power train 2007 warranty)

3. Throwout Bearing. Your description of the sound and the RPMs it happenens fits with the 6 speed issues. Again it's been around six years, the factory oem TOB has been known to be ****y.

Quote:
Originally Posted by smcutter View Post
It's hard to give you good advice at this point. It's almost like you're saying, "I want to have sex, but don't want to get her pregnant. I can't afford condoms, so for now I just want to use Saran Wrap. What brand would you recommend?"
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post #25 of 26 Old 06-02-2013, 01:29 PM Thread Starter
BadBarret
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I'm convinced it's a rattle from something loose. Any easy way to access the passenger header heat shield?
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post #26 of 26 Old 06-04-2013, 05:18 AM Thread Starter
BadBarret
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Update:
Just thought I'd send an update on the noise and I think I found it! Turned out to bw the xfer case shifter cable vibrating on the front panel. Just wanted to thank everyone for the help!!
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