98 wrangler 4.0 constant ticking noise - JeepForum.com
 
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post #1 of 12 Old 08-13-2012, 12:12 AM Thread Starter
Meng
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98 wrangler 4.0 constant ticking noise

Hi everybody,

Finally I bought a 98 wrangler 4.0 5spd today, with 128k miles on it for 7.8k....

The jeep is in good condition and the previous owner said that he replaced the fluids and distributor cap and rotor, spark plugs and wires.

The jeep drives pretty good so I took it.

I found out that there is a ticking noise from the engine at idle, and seems it is NOT going away when warmed up.. and I can hear the noise more clearly from the driver side wheel well than from the top of the engine. It is not loud, just a little ticking noise, and when I step on gas the noise will be "covered" by the engine rev sound and cant be heard anymore...Is this serious or just normal?

What`s more, there is a little bit rattling sound from the trans area when the ear is in neutral, when I push the clutch in, the sound goes away. what is that? Throw out bearing? The clutch is strong though, does not slip or anything.

I searched about the ticking noise and found out most cases it will go away when warmed up, but mine seems doesnt...

Anyway I plan to do a seafoam tomorrow and put full synthetic 10-30 oil in.

And I plan to change out the water pump and radiator hoses and coolant in the near future, anything else to do?

any input would be appreciated, Thank you guys!


Last edited by Meng; 08-13-2012 at 12:29 AM.
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post #2 of 12 Old 08-13-2012, 12:26 AM
MulletHunter
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You paid 78k for a jeep I'll sell you my 2004 rubicon for only 50k
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post #3 of 12 Old 08-13-2012, 12:29 AM Thread Starter
Meng
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ahhhhh my bad... I`ll edit it~
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post #4 of 12 Old 08-13-2012, 12:30 AM
TheGeorgiaSwagg
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Throw out bearing? Lifter?

Some may **** at the thought of this, but spray seafoam into your intake, as it may be the lifter. If it IS the lifter, use a thicker oil, will quiten it down. Just a thought.

Georgia Born, Georgia Raised, and when I die, Ill lie in a Georgia Grave.
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post #5 of 12 Old 08-13-2012, 06:46 AM
Richd1963
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The ticking noise may be an exhaust leak form either the manifold to the head or where the pipe flange bolts to the lower part of the exhaust manifold. Sometimes re-tightening the flange bolts will solve the leak. If it is at the head, it may need resurfacing or just a new gasket. Possible the manifold could be cracked.

The second noise may indeed be your throw-out bearing. When I first picked up my Jeep (used) it made some noise, but it hasn't made a peep after a few weeks of driving. I think mine sat quite a bit. She is '05 purchased in '09 with only 24k.
Good luck

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post #6 of 12 Old 08-13-2012, 11:30 AM Thread Starter
Meng
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How to identify a exhaust manifold leak?

how much longer can I drive under the condition of throw out bearing? Will it be harmful?

thanks
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post #7 of 12 Old 08-13-2012, 12:20 PM
jpin321
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Quote:
Originally Posted by Meng
How to identify a exhaust manifold leak?

how much longer can I drive under the condition of throw out bearing? Will it be harmful?

thanks
My 05 clutch rattles in neutral as well. Has since i bought it in 08. Noises are hard to describe over the forums. But if it's rattling like mine, sounds like it is from how you described it, i think you will be fine. Unless it gets louder or you have trouble depressing the clutch, i say drive it and don't worry.

"Anyone who has never made a mistake has never tried anything new." ~Albert Einstein
My Jeep History -- 1980 CJ5 > 2005 TJ X> 2013 JK Sport> 2015 JKU Rubicon > ?
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post #8 of 12 Old 08-13-2012, 01:31 PM Thread Starter
Meng
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cool...I will drive it for a little longer and see if there will be any changes.

update: I just went to look at my exhaust manifold, and I clearly saw a crack at where the two pipes connect....So I think a new head will be on its way..

I`m looking at this one:

http://www.ebay.com/itm/New-Exhaust-...485592&vxp=mtr

any suggestions?

it comes with the gasket, but I think the oem one will be better?

Thanks
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post #9 of 12 Old 08-13-2012, 05:28 PM
SimpleJack
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For the ticking I'd add Marvel Mystery Oil. I read folks talking it up for this symptom and added to oil a few weeks ago. Ticking went away in a day or two.
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post #10 of 12 Old 08-13-2012, 07:59 PM Thread Starter
Meng
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Will it make the oil thicker? I read that some say thicker oil is better and others say stay with the factory 10-30...
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post #11 of 12 Old 08-14-2012, 06:56 PM
01TJ-Bob
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You don't need to add anything to your oil you said the exhaust manifold was cracked, that's the ticking.
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post #12 of 12 Old 08-14-2012, 10:57 PM Thread Starter
Meng
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ok, thanks!
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