Ticking noise, lost bolt = the reason?
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Originally Posted by OleBlue
holy crap, sounds like a lower end rod knock to me. Or maybe a cracked flex plate?
Sooo a rod knock, sounds serious?
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Originally Posted by OleBlue
Yea if its a lower end knock, it is a serious issue. Im hoping cruiser will chime in here, probably has a better recognition of sounds than i.
Hopefully you're wrong!
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Originally Posted by cruiser54
Sounds light like valve train.
Not loud near the valve cover?
Comes and goes, right?
Not loud near the valve cover?
Comes and goes, right?
I need like a picture book for toddlers for this

Yeah it doesn't tick every time i drive, like every morning to work..
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Originally Posted by cruiser54
Valve cover has the oil filler cap on it.
I wonder though, since the tick comes from under the Jeep.
If I open the hood, i can barely hear it.. Damn jeep.
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
However, yesterday I did put some STP cleaner of some sort. A new kind but expensive. Didn't make a difference last night but I just took a detour to work so that the engine would get up to work temp.
No tick when I parked at work. Going for a longer drive after work so we'll see if that did the trick!
Edit: the tick cannot come from the engine. Just had the hood open as it ticked and its something low or under the car/engine.
At least that's my qualified guess
No tick when I parked at work. Going for a longer drive after work so we'll see if that did the trick!

Edit: the tick cannot come from the engine. Just had the hood open as it ticked and its something low or under the car/engine.
At least that's my qualified guess
Last edited by seww; Nov 15, 2012 at 02:11 AM.
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Took another video + one more.
http://youtu.be/29UbUegj1EE
From the inside, with the door a bit open, at idle.
http://youtu.be/dOczrlSZoZY
Outside, hood open.
Not sure you can hear it but it does not come from the engine..
Even had a mechanic listen to it today and he agrees, not the engine..
http://youtu.be/29UbUegj1EE
From the inside, with the door a bit open, at idle.
http://youtu.be/dOczrlSZoZY
Outside, hood open.
Not sure you can hear it but it does not come from the engine..
Even had a mechanic listen to it today and he agrees, not the engine..
Member
Joined: Jan 2012
Posts: 122
Likes: 0
From: Houston
Year: 2001
Model: Cherokee
Engine: 6 cylinder
Start your Jeep and then set your camera down where the tick is loudest and start it recording. Then get back in the Jeep and rev the engine just a little - tap the gas pedal a few times and let it idle back down between taps.
In my experience;
1. A rod knock should be evident since it gets louder as well as faster on the rev up cycle while quieting some on the down rev.
2. A lifter will just tick faster without getting much louder.
In my experience;
1. A rod knock should be evident since it gets louder as well as faster on the rev up cycle while quieting some on the down rev.
2. A lifter will just tick faster without getting much louder.
Thread Starter
Member
Joined: Jan 2012
Posts: 210
Likes: 0
From: Arctic Circle (Northern Sweden)
Year: 1990
Model: Cherokee
Engine: 4.0 Inline 6
Originally Posted by Reece
Start your Jeep and then set your camera down where the tick is loudest and start it recording. Then get back in the Jeep and rev the engine just a little - tap the gas pedal a few times and let it idle back down between taps.
In my experience;
1. A rod knock should be evident since it gets louder as well as faster on the rev up cycle while quieting some on the down rev.
2. A lifter will just tick faster without getting much louder.
In my experience;
1. A rod knock should be evident since it gets louder as well as faster on the rev up cycle while quieting some on the down rev.
2. A lifter will just tick faster without getting much louder.
I had it inspected today and it seems to increase in frequency as it revs up. But not in volume.


