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Unread 04-13-2013, 10:24 PM   #1
FordExplorer
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why my Jeep make a ticking noise 4.0 at idle?

It seen to get louder on warm weather . I currently using 10-30w valvoline high mileage, i don't if is the oil or what but oil pressure is good. the ticking noise only does at idle once the engine is warm up and go away when you press on the gas. That normal should i get worry ?

2000 Jeep Gr Cherokee 4.0 with 160.012 miles

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Unread 04-13-2013, 10:44 PM   #2
04dubjay
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Ah yes, the old tick tick 4.0 question. I honestly think that everyone's jeep has a tick here or a tap there, My opinion? If it aint broke, don't fix it!
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Unread 04-13-2013, 10:48 PM   #3
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Quote:
Originally Posted by 04dubjay View Post
Ah yes, the old tick tick 4.0 question. I honestly think that everyone's jeep has a tick here or a tap there, My opinion? If it aint broke, don't fix it!
so that normal?
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Unread 04-13-2013, 10:53 PM   #4
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Originally Posted by FordExplorer View Post
so that normal?
From what I've read on this forum I'd say YES. As long as it isn't effecting anything else noticeably (mpg, performance, codes, etc).
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Unread 04-14-2013, 06:23 AM   #5
wheelhead
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My 2000 4.0 ticks for 30-45 seconds after a cold start. So I say it's fine.
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Unread 04-14-2013, 08:58 AM   #6
99WJ01TJ
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it's normal, the 4.0 I6 has a flat tappet cam & combined with the lifter & pushrods.....it's just going to be noisy. Perfect example is the old VW beetle motors; they also use a flat tappet cam, lifters, & pushrods and see how noisy there valve train components are. It's a design that's been around forever & frankly it's bomb proof. Even old high reving Porsche's have this design & they have valve chatter.
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Unread 04-14-2013, 09:27 AM   #7
cpratt247
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On your next oil change, replace 1qt of oil with 1qt of Marvels Mystery Oil. It will stop the tic.

I buy a 5qt jug of Castro high mileage from Walmart & 1qt of Marvels...no tick for me.
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Unread 04-14-2013, 09:41 AM   #8
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Originally Posted by cpratt247 View Post
On your next oil change, replace 1qt of oil with 1qt of Marvels Mystery Oil. It will stop the tic.

I buy a 5qt jug of Castro high mileage from Walmart & 1qt of Marvels...no tick for me.
are you sure this Marvels stuff will not destroyed my engine ?
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Unread 04-14-2013, 09:43 AM   #9
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Quote:
Originally Posted by 99WJ01TJ View Post
it's normal, the 4.0 I6 has a flat tappet cam & combined with the lifter & pushrods.....it's just going to be noisy. Perfect example is the old VW beetle motors; they also use a flat tappet cam, lifters, & pushrods and see how noisy there valve train components are. It's a design that's been around forever & frankly it's bomb proof. Even old high reving Porsche's have this design & they have valve chatter.
This guy is saying on every Jeep with a 4.0 from 99-04 if you have a tick noise you have a crack head I confuse now .

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Unread 04-14-2013, 10:00 AM   #10
99WJ539918
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He's an idiot then. A small tick on cold start is okay. His tick was something worse.
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Unread 04-14-2013, 10:04 AM   #11
99WJ01TJ
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that was his finding based on removing his head. I had a exhaust manifold bolt break on my 4.7 V8 & i swore i dropped a valve head, come to find out with the engine cold & running the gap was huge and allowed more valve noise to escape. When it heated up it closed the gap. If you're worried about a bad head, get a block test kit from the auto parts store & it'll tell you if you have exhaust gases in your coolant.
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Unread 04-14-2013, 10:23 AM   #12
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Quote:
Originally Posted by FordExplorer View Post
are you sure this Marvels stuff will not destroyed my engine ?
No, it's good stuff for cleaning and it may clean up things enough to lessen or stop your tick. It's been around for 80 years thousands of people love the stuff for various uses.

While it may help your tick it will thin your oil considerably. I suggest you jump up a grade to a 10w40 if you're going to add a quart of that stuff. A pint would be fine in your 10w30 you can add it now if you wish, much of it will burn off in a few hundred miles.

A "tick" is a lot different than a "clack". A clack is bad and can be a cracked exhaust manifold (a possibility if it goes away once warmed up) or a broken piston skirt. The latter is a disaster but it will not go away when warmed up, it will be constant.
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Unread 04-14-2013, 11:46 AM   #13
heitzman
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I have a ticking noise in my 4.0 also. I run 10W40 and a Qrt. of Marvels Mystery Oil every oil change, It helps but it is still there from time to time. When mine warms up it is better but when you are at a idle it will stop ticking for 30 seconds or so and start ticking again. I have done an oil change with out Marvels Mystery Oil and the ticking is worse. I would try it, its not going to damage anything. You could have a weak or flat lifter, I believe that is what my problem is a weak lifter. I would replace my lifters but I dont want to spend the time to remove the head. Hope this helps.
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Unread 04-14-2013, 07:13 PM   #14
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Quote:
Originally Posted by wheelhead View Post
My 2000 4.0 ticks for 30-45 seconds after a cold start. So I say it's fine.
My tick once the engine is warm up and at idle and go away when you press on the gas ?
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Unread 04-14-2013, 07:14 PM   #15
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Quote:
Originally Posted by heitzman View Post
I have a ticking noise in my 4.0 also. I run 10W40 and a Qrt. of Marvels Mystery Oil every oil change, It helps but it is still there from time to time. When mine warms up it is better but when you are at a idle it will stop ticking for 30 seconds or so and start ticking again. I have done an oil change with out Marvels Mystery Oil and the ticking is worse. I would try it, its not going to damage anything. You could have a weak or flat lifter, I believe that is what my problem is a weak lifter. I would replace my lifters but I dont want to spend the time to remove the head. Hope this helps.
My tick once the engine is warm up and at idle and go away when you press on the gas ?
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