Tick when jeep gets to running temp. - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 11 Old 05-12-2018, 07:00 PM Thread Starter
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Tick when jeep gets to running temp.

Hi guys this is my first jeep 2010 Sahara unlimited 3.8. Im having an issue when it gets to running temp i get a tick almost like a knock at idle i rev it up slightly goes away or i can pull it down in drive and stall it up and it goes away. Ive installed new lifters exhaust gaskets timing chain and oil pump. After the timing chain and oil pump ran like a sewing machine at idle i gave it gas one time and it came back. Its very quite on cold starts im at a loss right now. Any help is appreciated. If i broke any rules let me know thanks
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post #2 of 11 Old 05-12-2018, 07:42 PM Thread Starter
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[QUOTE=Nickmc316;4412066]Hi guys this is my first jeep 2010 Sahara unlimited 3.8. Im having an issue when it gets to running temp i get a tick almost like a knock at idle i rev it up slightly goes away or i can pull it down in drive and stall it up and it goes away. Ive installed new lifters exhaust gaskets timing chain and oil pump. After the timing chain and oil pump ran like a sewing machine at idle i gave it gas one time and it came back. Its very quite on cold starts im at a loss right now. Any help is appreciated. If i broke any rules let me know thanks https://youtu.be/DjCOBgJdoD4
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post #3 of 11 Old 05-12-2018, 08:13 PM
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I'd be willing to bet that there is a cracked manifold makin' that noise .
Look under the heat shield , this has been a problem for JK's that have seen water splashed on them while hot .
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post #4 of 11 Old 05-13-2018, 04:39 PM
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I would get a mechanics stethoscope and poke around see if you can narrow it down after you check to see if there are cracks on the manifold like suggested.

Have you noticed and oil disappearing from the dipstick? Maybe rod bearings are bad?

*typo edit*

OIF
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post #5 of 11 Old 05-13-2018, 05:24 PM
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@un lupus
sggsts a possible cause, particularly since it’s after it heats-up ( metal expansion) that you hear this. It is most often on the 07’ -‘11 3.8l driver side ,tho it is also apt to occur on pssgr side as well.
front exhaust manifold beneath heat shield . It will sound like a “pht-pht....puttputtputt...pht-....” . Water can crack them from hitting a puddle but also stress just takes its toll on hot cast iron manis.

Also, being heat from a period of running is when you experience this , the possibility of an arc from a pinhole in a ignition wire from around the gray boot on one of the plugs can be a noticeable ‘ snap!’ or ‘zap-like’ ticking noise. Best diagnosed in super dark garage at night with 0 light. You’ll see the blue arc jumping to wherever it grounds m usually the engine block.

Lastly, oil viscosity breaks to lesser levels as it is warmed up. Are you running the manual or service center sggted 5w-20 motor oil?
If so, myself and thousands of other 3.8l owners will tell you to put 5w-30 in it to rid yourself of the noise from running 5w-20 .

Whoever suggested stethoscope diagnosis has it right ...grab your longest screwdriver,stick the handle to your ear & isolate the noise before you go insane.

amhik




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post #6 of 11 Old 05-13-2018, 05:30 PM Thread Starter
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https://youtu.be/hDSdk2zIK5w
The thing that has me most confused is when its a slight rev like this on the decel it clanks no metal shavings in any oil change and under a load its quite as can be no oil dissapearing randomly or leaks at this time about quarter of a quart low between oil changes. And it only does this at running temp ive even been close to house at full throttle and nothing runs strong no clanks or knocks
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post #7 of 11 Old 05-13-2018, 05:32 PM Thread Starter
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Quote:
Originally Posted by j3ff3ry_j33p View Post



@un lupus
sggsts a possible cause, particularly since it’s after it heats-up ( metal expansion) that you hear this. It is most often on the 07’ -‘11 3.8l driver side ,tho it is also apt to occur on pssgr side as well.
front exhaust manifold beneath heat shield . It will sound like a “pht-pht....puttputtputt...pht-....” . Water can crack them from hitting a puddle but also stress just takes its toll on hot cast iron manis.

Also, being heat from a period of running is when you experience this , the possibility of an arc from a pinhole in a ignition wire from around the gray boot on one of the plugs can be a noticeable ‘ snap!’ or ‘zap-like’ ticking noise. Best diagnosed in super dark garage at night with 0 light. You’ll see the blue arc jumping to wherever it grounds m usually the engine block.

Lastly, oil viscosity breaks to lesser levels as it is warmed up. Are you running the manual or service center sggted 5w-20 motor oil?
If so, myself and thousands of other 3.8l owners will tell you to put 5w-30 in it to rid yourself of the noise from running 5w-20 .

Whoever suggested stethoscope diagnosis has it right ...grab your longest screwdriver,stick the handle to your ear & isolate the noise before you go insane.

amhik
<a href="https://www.jkowners.com/forum/images/smilies/jeep2.gif" border="0" alt="" title="Jeep2" >:-)</a>

Ive tried this its really hard to tell where excatly is coming from with how it acts on decel im really not thinking exhaust leak
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post #8 of 11 Old 05-16-2018, 05:29 PM Thread Starter
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Checked exhuast manifolds could not locate a leak. Visually and with soapy water...
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post #9 of 11 Old 05-17-2018, 05:35 AM
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now, we really don’t know you from Adam ( we have a Welcome Room,fwiw) but if you want to have advice beyond what’s been stated ya may wanna take a few mins to record the sound via video , upload that to YouTube then post the link so readers can hear your particular tick....
alternately , there are a lot of 3.8l YouTube noise vids...


I wasn’t jokin about use of something as a stethoscope. Even 2’ cutoff a broom handle will amplify / help pinpoint noise sources.





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post #10 of 11 Old 05-17-2018, 12:14 PM Thread Starter
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[QUOTE=j3ff3ry_j33p;4413946]now, we really don’t know you from Adam ( we have a Welcome Room,fwiw) but if you want to have advice beyond what’s been stated ya may wanna take a few mins to record the sound via video , upload that to YouTube then post the link so readers can hear your particular tick....
alternately , there are a lot of 3.8l YouTube noise vids...


I wasn’t jokin about use of something as a stethoscope. Even 2’ cutoff a broom handle will amplify / help pinpoint noise sources.



I have two videos in this discussion of my wheel one of it idling ticking and one of the rev with ticking when car does into drive with foot on brake and about 1300rpms the tick is gone has anyone ever had trouble with flexplate... ive also used screwdriver at first for noise then got a stethoscope i could not pin point it its loudest under the car
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post #11 of 11 Old 05-17-2018, 01:25 PM
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I would have a mechanic look at it so your not wasting time with it if you can’t self diagnose it.

I’m also willing to bet it’s a main bearing/ rod bearing just by the sounds of it in your video. Given the fact that’s the most common issues with 3.8’s.

Bottom line is I’d get someone else to look at it.

OIF
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