At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
My 93 325is engine is starting to get a ticking sound at an idle like a lifter noise. As soon as I rev it up to 2 thousand rpm it stops, anything I can do to make it stop, oil additive or anything? It only does it when the car is idleing
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
could possibly be a lifter tapping (Ticking) ,depending on how many miles the vehicle has on it might be time for lifters to be adjusted,most foreign overhead cam engines must have lifters adjuster periodically ,if you turn on the air its puts more of a load on the engine causing a louder sound (also check oil level an engine low on oil will start to tick too.. the more wear the engine gets the looser the lifters can get over time ,look in your service manual if you have one and see what the intervals are on lifter adjustment this can give you an idea.
possible only if
the ticking sound is coming from the top of the engine usually comes from under the vavle covers where the lifters are located,
Ticking sound could be coming from a Coil-on-Plug, or a pcv valve, or (hope it's not) a valve lifter which could be sticking. Sticking lifter noise often disappears when rpm's change, or the noise comes & goes. try changing the motor oil & filter right after adding an Engine-Flush Treatment to the motor oil, running the engine for 10 minutes at idle with treatment added to the oil, then draining the oil & changing filter while oil is still very hot. That last part is very important, so be careful not to burn your hands - be careful. -- The sticking lifter is a likely cause if motor oil has not been changed at frequent intervals in the past (every 3-4K miles) -- dirty oil causes sticking lifters.
Prognosis is really bad, hate to tell you. Ticking comes from the valve lifters, losing lubrication due to lack of pressure and running dry. At redlights, when revs are at idle, oil pressure drops a lot, and engine really suffers. Have the vehicle taken immediately to a shop for proper diagnose and to see if engine can still be saved. The loss of power comes from the valves not actuating properly. Hydraulic lifters need oil at a decent pressure to "charge" , and if not charged, they will stay compressed, ruining valve lifting operation.
If the noise you are hearing is a deep hard sounding knock or rapid metallic rattle that vanishes as soon as the oil pressure increases then you could have either excessive bearing clearance at a rod and/or main bearing or an oil filter that is allowing the oil in it to drain back into the crankcase which is delaying oil from reaching the bearings for the first couple of seconds which is essentially like starting up the engine with no oil in it as it takes a bit for the oil to refill the filter and galleys before it can reach the bearings. It could be a hydraulic lifter but they generally make more of a ticking or clacking type of noise and take a bit longer to go away...and may even come back at random times. To find the source of these kinds of noises I usually hook up a mechanical oil pressure test gauge, allow the vehicle to sit overnight, then start it up and see how long it takes to build up oil pressure. I then allow the engine to warm up fully [say 30 minutes of idling] and then recheck the oil pressure. If the noise stops as soon as the oil pressure rises then I'd try a genuine Mopar oil filter first to see if that fixes the problem. If the oil pressure drops off to less than 10 psi at a fully warmed up idle and doesn't get much over about 20 psi at 2000 rpm then you may have excessive rod/main bearing wear which would require some more serious work to correct. If the oil pressure stays at about 15 psi at an idle and rises to over 35 psi at 2000 rpm then the bearings are probably in decent shape yet. Hope this helps a bit and good luck!
The 'light tick' is most probably a valve lifter. The valve lifters in the engine are hydraulic, and are pressurized by the engine's oil pump.
When the engine gets some mileage, say 60 or 70 thousand miles or more, the engine is just not as tight as it once was. What happens is that the lifter loses its pressure when the engine is not running, because there is some wear. When you start the engine, the lifter takes a few moments to pressurize, and makers a ticking noise until it does. The 'ticking' is the sound of the valve being hit by the push rod, which is being pushed by the lifter. Once the lifter is pressurized, the 'ticking' sound stops. This is a very common thing for engines, it will eventually happen to nearly every one.
Sometimes, thin, old oil can cause this. If you have not changed the oil/filter in a while, you should do it now.
This is nothing to really worry about right now, but it is a sign of engine wear. Just be sure to run the proper oil in the engine, and do all the proper maintenance.
The most common reason is the hydraulic valve lifters. The short term fix is to
a) replace the oil and filter if this has not been done recently.
b) Rev the engine to 3000 rpm and hold for 30 seconds. This pumps up the lifters and helps clear old oil.
c) do this 2-3 times until the clicking stops.
The longer term fix is to replace all 16 lifters.
Other more expensive reasons are
a) a big end bearing. This sounds more like a hammer on anvil hit, and its louder if you blip-rev the engine. Rev to say 2000 and back off slightly and the noise stops. The fix is a replacement engine or engine rebuild.
Sounds like an Exhaust Manifold leak on only one cylinder. The Gasket is probably blown out. Check around where manifold is bolted to the engine. Any leaks are usually evident by a black sooty deposit.
this is a very common issue with any of the bmws with n52 and n52k engine,as long as oil level is ok and is being changed regularly than than a "blleding proceedure" may solve this problem, when the engine has been running long enough that it is hot run the engine at idle to 4500 rpm for 10 to 12 min to start, if is still present after this attempt again.It has been said that this could take up to 30 min at longest.The reason for the ticking noise is a very tiny air gap in the hva and or lifters, try this and if does not work than the lifters should be replaced, although this noise doesnt really hinder the performance it does take away from driving such a nice car and having a loud noise come from the engine, good luck
That ticking your hearing is most likely a valve lifter or tappet that is dirty or failing.At low RPM the oil pressure is lower, as you increase the engine speed the oil pressure rises; with this the lifter sees more oil pressure too and it fills fully with oil thus the ticking stops. You may be able to fluch the oil system in hopes of cleaning out any debris; my gut says the lifter is beginning to fail and should be replaced. If you have the ability and tools this is something you can do in your garage; pick up a manual and review the procedure before tearing into the engine.
I hope this may have helped,
Tom
×