ticking noise while accelerating

I have a BMW Z4. When I start driving and accelerate I here a ticking noise. The dealer says there is nothing wrong with the car. But I worry about the noise. It sounds like it could be the vents or the air intake. I don’t hear anything when the car idles. I only hear it when accelerating. It sounds like baseball cards in bicycle spokes. Do you have any idea what this could be?
Experienced mechanics share their insights in answering this question :
Hello. There are a few possibilities that could be causing the noise you are hearing. Some of the possible causes include: pieces of the catalytic converter could be rattling in the exhaust, broken baffles in the muffler, a loose flap in the intake, or loose bolts around the engine exhaust or intake. I would suggest that you have a certified technician, such as one from YourMechanic, come and complete and inspection in order to pinpoint why your car is making a noise.

How to Identify and Fix Common car Problems ?

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Loose Lifter: A pure mechanical issue in your BMW engine that causes a ticking sound is a loose lifter. The lifter drives the intake and exhaust valves open as your engine runs. If the lifter becomes loose, it will tap the camshaft making the ticking noise.
Low Oil Pressure Or Engine Oil Level

The ticking noise might intensify when you start, idle, or accelerate your car. On the other hand, using the wrong engine oil or a bad oil pump can also cause a ticking sound. To steer clear of such issues, check your engine oil level and top it off with the right engine oil.

If you hear a rattling noise when you are accelerating then this is definitely a friction problem. This could be a simple fix such as tightening or replacing your engines various belts. You can do a simple check by dropping some water on the belts and revving the engine.
This means that coolant is leaking down through a cylinder into the crankcase. This usually indicates a blown head gasket or cracked cylinder head.
If you suspect there may be a component ticking, one method for diagnosis is to remove the drive belt and hand-spin each component. If nothing is still suspect, start the engine and immediately listen to see if the tick has disappeared.
There are many different causes for this sound in your BMW. These include dirty air filters, spark plugs that are old or worn out, or a clogged fuel filter. Larger issues could be an issue with the ignition or a clog in the catalytic converter.
A Rattling Noise from the Engine When Accelerating

Noises coming from the engine when you are pushing on the gas could be caused by a loose or weak timing belt, chain tensioner, cracked flywheel, or a broken flexplate. These issues will only get worse over time, not better.

One of the most well-known reasons for clicking noise in the engine is related to low oil pressure. It can cause the engine`s moving parts to contact each other without proper lubrication.
Ticking noise could be due to `knocking`. That could happen if injector opens(starts Injecting) too early. Injector can be tested (to determine if ticking noise could have been caused by faulty injector). If it is deisel engine,take it to fuel injection service station/shop nearby.
The ticking noise you hear may be related to BMW hydraulic valve lifters. A faulty oil pump plunger might also be the cause. You will know that your BMW`s hydraulic valve lifters are in need of replacement if, while idling and under load, you hear a ticking sound coming from the front of your engine area.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car makes a ticking noise when turned on, and when accelerated, ticking frequency increases. Is it a bent push rod maybe?
ANSWER : Your engine does not have push rods. The noise may be a worn cam lobe or tappet. The noise can come from lack of lubrication to the valve train if maintenance was not done and there is sludge build up in the engine. Make sure you are using 5w20 in your engine also. If the trouble continues, I recommend having a certified mechanic, such as one from YourMechanic, come to your home or office to diagnose the noise and make the appropriate repairs.

Ticking noise during acceleration – 1998 Chevrolet Tahoe
ANSWER : Hello. If the noise is intermittent like this most of the time, it is due to a failing valve lifter. When a lifter will not hold pressure then this will occur. It can also happen if there is a bad spark plug wire, but that is not as common or as loud. I would need to hear the noise to know for sure, but either of these will cause this. If you are planning on having this fixed, consider YourMechanic, as a certified technician can come to your home or office to diagnose the noise and guide through appropriate repairs.

When I accelerate, loud ticking noise at low rpm, car jerks and stutters. It goes away at higher rpms.
ANSWER : The misfiring could be ignition or fuel related. If the plugs have not been replaced, on the timetable set forth in the maintenance schedule, that is certainly one possibly. Also, the plug wires could be tested. Diagnostic Trouble codes that "refer" to oxygen sensors do not always set because the sensor itself is bad. Lots of other faults can cause those codes. Oxygen sensors should be tested for function prior to being condemned on the basis of a "code" but if yours are original, and thus have 170,000 miles, it would not be unreasonable to replace them as part of the diagnostic and repair (and, of course, replacement may resolve part of the issue you are having). Codes related to any misfiring need to be scanned by a Mechanic and evaluated. If there are no such codes, a scope should be used to look at the firing patterns in the cylinders to infer where the fault lies. The ticking noise is probably related to the valve train. One possibility is low oil pressure and such is tested with a pressure gauge. I recommend you request a misfiring diagnostic to get that problem resolved as it is the most basic and then deal with the Codes referencing the O2 sensor(s) and finally the noise.

ticking noise while accelerating
ANSWER : Hello. There are a few possibilities that could be causing the noise you are hearing. Some of the possible causes include: pieces of the catalytic converter could be rattling in the exhaust, broken baffles in the muffler, a loose flap in the intake, or loose bolts around the engine exhaust or intake. I would suggest that you have a certified technician, such as one from YourMechanic, come and complete and inspection in order to pinpoint why your car is making a noise.

Car runs better if I unplug fuel injector 8 but makes a ticking noise and runs sluggish if it’s connected 2006 Ford Mustang
ANSWER : Hello – your symptoms suggest a failing injector . It appears to be leaking when it’s plugged in, as well as noisy. Check for problem codes relating to a rich mixture,, although it’s possible that the oxygen sensors for that bank of cylinders is leaning out the other 3 on that side. This would create rough running for sure. That would explain the popping (probably backfiring or misfiring at least on the lean cylinders). I recommend a misfiring inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Ticking when accelerating
ANSWER : With the information that you’ve provided, I think you are describing an exhaust leak. It’s not uncommon for a minor exhaust leak to tick, especially when cool, and then go away as it warms up. It can also increase when accelerating due to a build up of pressure as the engine strains to accelerate. There could be a crack in the exhaust manifold, a crack in a pipe, or even an exhaust gasket that may have failed. Colder weather can have an adverse affect on the situation, as the components will heat and cool at a faster rate. If this is something you feel you could use a hand in identifying and/or repairing, contact a certified mechanic, like those available at YourMechanic.com.

The engine is making a ticking noise I would like to what it might be
ANSWER : Ticking or knocking sounds typically come when the engine has been ran low on oil for a period of time or if the engine has had the wrong oil in it. I would recommend checking your oil level to ensure that it is full. After this, if the oil level is full, I would recommend having a qualified professional inspect your engine for damages. When the engine is not lubricated as it should be, this can cause excessive wear to the drivetrain. When excessive wear occurs in the in the valve train this can cause the ticking noise you are hearing. If you need assistance getting this looked at, a certified technician from YourMechanic can come to your location to diagnose the ticking noise and advise you on proper repairs.

Ticking noise in engine
ANSWER : Hello. The sound of ticking is not normal in most cases. A technician will have to listen to the ticking sound in person to determine if the noise is normal or not. Oftentimes a ticking sound can occur from low-grade gasoline. I suggest to put a little premium in the gas tank and see if the ticking noise subsides. If this does not resolve the issue, enlist the help from a qualified technician who can diagnose the sound and make the necessary repairs to your vehicle.