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.
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.
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.
Could possibly be a bad lifter.
Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
Not that familiar with Jeeps, but you could have a collapsed lifter, or you might have a rocker arm out of adjustment.
There are many reasons why a Jeep Wrangler is overheating. A leak in the radiator system will cause overheating. Too much pressure in the engine can cause overheating. A bad water pump or thermostat could cause overheating. The transmission can also cause overheating if it is leaking.
A 97 Maxima can have these symptoms because of a bad alternator. If the alternator has low output there can be a ticking and eventually the engine will stop running.
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.
can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?
You oil pump is not working?
I had a similar problem in a taurus. I had to replace the alternator.
Its possible that this ticking sound is caused from driving fast for prolong periods. Its possible that its not the engine that is making the sound, but the exhaust system somewhere. I hear a ticking sound if I drive over 140KMh for long periods. It always stops once the car cools. I hopes this helps.
The cool water hitting your piping hot exhaust makes the metal contract (Shrink) and it makes a ticking noise.
Most likely is knocking. Try next higher octane grade of gasoline.
After fixing the cause of the trouble code, you clear code with a scan tool.
A faulty gas cap could cause the check engine light to come on but it would not cause a rough idle or engine noises. Start with having your local auto parts store read the codes. The codes will help determine why the check engine light is on.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
you have a bad crank senser