Detonation....Needs to be fixed immediately
It is probably not detonation as stated above, rather a lifter is sticking and needs to be replaced.
Also, the rocker arm bearings can get worn out. As stated above, just replace.
>Both My 4 litre and my old 2.5 litre ticked when cold. As soon as the engine warmed up it went away.
There are two distinct things in these engines that will cause a tick noise and I've had both occur in both engines. Detonation is NOT going to cause a constant tick as you're saying.
1: you have either a sticking lifter or sticking exhaust valve. My 4.0 wrangler does this when it's cold, I've come to the conclusion that it's an exhaust valve because if you give the engine a minute or two to "cool off" at an idle before shutdown, it seems to not tick the next time it's started. This was never a CONSTANT problem, was more intermittent.
2: You have a leaky exhaust manifold gasket. THIS is more likely your tick. I've had this occur on EVERY Jeep I've owned. I think this is due to the fact that EVERY jeep I've owned came straight from the factory without nuts on the exhaust manifold studs at the extreme front and rear of the engine. You need to replace the gasket, torque the manifolds properly and install nuts on the nutless studs.
ADDED TO HIS LIST....
3. Worn cam lobe.
4. Crank bearing/seal worn.
5. Pistion walking.
6. dead spark plug
7. bent push rod.
8. bad roter/cap - thus spark plug not dedet.
9. bent connecting rod.
or your timing could also be off.
Or worst thing worst you blew a piston due to your side wall giving away. this is a common problem on older 2.5liters it happens in the number 1 or 4 cylinder mostly due to un-even cooling. Mine happened from a radiator leak that i didn't notice, and my bud's from and air pocket. If your not offroading and or beating it this shouldn't happen.
Whatever it is get it fixed before you need a new enigine.
All jeeps have a light knock but its just from normal rod/value movement.
We can't know for sure, but the cause might be constant fighting and arguing
no, they broke up because of their constant fighting.
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
That is a possibility.That is a possibility.
A gasket could be the cause of a Jeep Cherokee engine to whistle when it's cold. Check the throttle body gasket to see if it needs to be replaced.
ticking sound in engine is usually not caused by a timing belt ticking is usually caused by worn cam shaft or clifters most cars now have hydraulic lifters. if oil is low it will cause ticking. if a lifter is worn it will cause ticking these should have been ckecked for wear when replacing timing belt
Ticking in an engine generally refers to the valves. If ticking is apparent on a 1994 Chevy Lumina tighten the valves to factory specifications.
Hey Mart==Generally just one valve ticking wouldn't cause a power loss. It deoends on what kind of car and engine you have. It could be an injector ticking which would cause a dead miss. GoodluckJoe
Normally loose tappets will cause a ticking sound in the engine. Depending on if you have mechanical or hydraulic tappets you may need to have them replaced or simply adjusted.
The 3.0L engine had a problem with the lifters that would cause the top end to tick. There is a TSB i believe on how to fix it. If the ticking is coming from the bottom of the engine (sometimes hard to tell) then you might have a Con-Rod knock that starting to show. Eitherway take it to a mechanic for diagnoses.
If the ticking is coming from the top of the engine it is likely the Hydraulic (valve) Lash Adjusters.A fresh oil change using a quality oil and ***an OEM filter from the dealership*** should clear the noise up within 15 minutes of driving.Use of a non-OEM filter can cause valve train ticking noise.
The most likely cause of a ticking sound in a motor is a bad timing belt. A valve out of time can also cause a ticking sound.
Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
Could possibly be a bad lifter.
Not that familiar with Jeeps, but you could have a collapsed lifter, or you might have a rocker arm out of adjustment.