Jeep ticking noise

[Nick17]

hello everyone, I have a Jeep TJ(1999) 4.0L, straight 6, I’ve noticed for awhile every time I accelerate I hear a noise where it’s just a rapid ticking, when it is in idle it dosent tick until I hit the gas pedal then it ticks, is this a sign of a exhaust leak? Please help!!

 

[JamesAndTheSahara]

hello everyone, I have a Jeep TJ(1999) 4.0L, straight 6, I’ve noticed for awhile every time I accelerate I hear a noise where it’s just a rapid ticking, when it is in idle it dosent tick until I hit the gas pedal then it ticks, is this a sign of a exhaust leak? Please help!!

Probably a cracked exhaust manifold.

 

[Kiwi TJ]

It must be loud I can hear anything once I'm rolling... and I have a 99 4.0L manual too...

Hopefully the ticking is nothing like what was in the movie "speed" as you cant drop below 55 !..mine would struggle to get to 55 haha

 

[bobthetj03]

Either a cracked manifold, or a lifter tick.

 

[Chris]

Either a cracked manifold, or a lifter tick.

X2

 

[Chris]

Here's a simple way to find exhaust leaks FYI:

 

[ac_]

By accelerate, I am assuming you mean with the Jeep sitting and not actually moving?

 

[Chief1942]

Also might want to lift the hood and put your hand on the top of the OPDA while the engine is running. A "ticking" sound was what got my attention to my OPDA needing replacement. Those are not something you want to learn to live with if they are making noise. Some have a squealing noise from their faulty OPDA's but mine was definitely a clicking sound and I could feel the knock when I placed my hand on top of the unit.

 

[grr]

My ticking noise turned into a broken piston skirt.

 

[TJ2]

My ticking noise turned into a broken piston skirt.

Ouch!

 

[grr]

Ouch!

Which turned into a motor rebuild.