E90 low rpm rattle

Original Poster. Search My Stuff What's New 3 12 24 E90 i N52 - engine rattle. Gents, and Ladies, I have an issue with my k mile 05 i. I first noticed this noise 2 years ago after I first bought the car, but didn't worry about it as you can only hear it normally when the engine is hot, windows open, and with a wall or car next to you.

It is a rattle type sound that can be heard at idle and up to about 2k rpm shortly after starting the car and at operating temperature. Sadly it can be heard with the drive belt off. I'm going to order a new timing chain tensioner but doubt that will fix anything. Has anyone heard this before?

Backstory: Today I changed the spark plugs. All well and good apart from one of the NGK plugs I bought came with the washer straddling 2 or 3 threads, meaning it was stuck.

I didn't want to force the washer to the top of threads by torquing it into the engine, so I reused one of the original plugs I believe it was running a set of plugs that replaced the factory plugs at 65k miles. After plugging the coils back in I started the engine with the bonnet open and the engine cover off. It sounded quite a lot worse with all of the sound deadening removed. Investigating further, I removed the drive belt to see if the sound could be isolated to a belt driven component or the engine.

Presuming it was a bearing of some sort, to my dismay I found the engine still made the rattle. Given that I tend to drive the car hard after 15 mins of driving to warm up to the oil and never hear any untoward nose when actually driving, I suspect the car has made the same noise for the last 21k miles.

Oil change intervals are k miles using quality 5w Do any of you have any experience of this noise? I'm going to cycle to work for the week whilst I wait for a new timing chain tensioner and single NGK spark plug to arrive.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. The car gives a rattling noise when rolling at low rpm with the clutch engaged in any gear. The noise goes away if I add a little gas or depress the clutch any idea what could be causing this? But first, I would check all the heat shielding on the car to make sure that's not a factor.

e90 low rpm rattle

When the transmission is engaged when the clutch is not depressed it can cause some NVH noise, vibration, harshness that will cause nearby heat shields to rattle and make it sound like a transmission problem. The important thing is to isolate the sound to exactly your transmission. Loose heatshields and other motive parts can cause sounds and NVH can make it sound like it's coming from a different location.

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 3 years, 11 months ago. Active 1 year, 1 month ago. Viewed 28k times. I have a E39 BMW. Fred Wilson Have you ever replaced the clutch or throw-out bearing? Sounds like the throw-out bearing might is bad. The throw out bearing is what pressed the clutch plate and the clutch.

Thats why the vibration goes away. I would take the car to a mechanic because this is a serious issue that could end up costing lots of money if not taken care of quickly. Active Oldest Votes. Good luck!

Thanks for the detailed answer. I checked the heatshields and found one to be rotten a little, I welded it together just in case, but the noise did not go away. I am guessing that it is the clutch because the nosie reacts to movements with the clutch, and it is coming more from the engine of the car while the catalytic converter is under the first seat row. I'll have the throw out bearing replaced, and see if that solves the issue! Thanks again! It certainly sounds like a bad throw out bearing in that case.

While in there check the clutch pressure plate for any loose diaphragm springs the tooth looking devices that the throwout bearing presses these can get loose over time and when it's time to replace the clutch, make excessive noise. When replacing the throwout bearing, you may as well replace the clutch assembly. Just go ahead and get a full clutch job done. I hope this fixes your issue! The noise goes away if I add a little gas or depress the clutch This is a classic symptom of a bad throwout bearing.

Zaid Zaid Sign up or log in Sign up using Google.Aug 7, 1. Messages: 2, Likes Received: 0. Aug 7, 2. Messages: 5, Likes Received: How loud is the noise and does it change with the temp of the engine?

If its louder when cold then I would suspect piston slap, if its when the engine is hot it could be a wrist pin problem as Ive found those tend to make more noise as the engine heats up and oil gets on it making it want to move around more. Sometimes a broken piston skirt can cause wierd noises aswell but thats rare with the better materials used in pistons these days. Your best bet would to be to drop the pan and have a look around since your pretty sure the noise is from the bottomend and take a good hard look at the bottom of the pan too.

Aug 7, 3. Messages: 6, Likes Received: 5. Check the simple stuff 1st. Get you a pc. When you get to the spot that's rattling you will know it.

The hose will make it much louder to your ear. Aug 7, 4. Messages: 12, Likes Received: It's not detonation- that won't happen on over-run, only under load. Aug 7, 5.

e90 low rpm rattle

Messages: 16, Likes Received: 2. I agree on looking for outside things.That's a whole new car BMW!!! I am getting a 2nd opinion on Thursday. Wish me luck! When the service guy at BMW gave me this estimate he said "I'll just give u this and run! I am never going back to dealer. They are not capable of fixing these cars just replacing the parts on vague guesses does not fix anything.

Hopefully will find out on Thursday! Sent from BimmerApp mobile app. I moved your thread to the E90 forum. Let us know what the second opinion says. Thanks Tim. It would not post yesterday from app in e90 for some reason.

But yeah I'll definitely post the 2nd opinion here. This is in reference to the rattle sound that comes from around the engine, could be wastegate, fuel injectors etc. At this point it can be anything. Shavings found internally won't be from a wastegate or fuel injectors.

How did they discover the shavings, from the oil pan? So this is the estimate the dealer gave me for new n54 motor saying they found metal shavings in the engine a worn piston causing the sound etc Not enough info to do anything with. More to this than we've seen? Thekurgan yes they found the shavings in oil pan.

Calwaterboy Due the problem I started having couple of weeks ago is the rattle sound coming from front of the car. At first it only appeared in low gear 2 rpms and on acceleration, now it's doing it on idle as well and when going 60mph. No check engine light. Rides like normal.

But that noise sounds like metal to metal. Like something is loose. Unplugged the vacuum lines to see if the sound would go away on turbos. Nothing still had the rattle. Not a clue where the sound is coming from. It is! To no avail the 2nd opinion was exactly that.

My choices now are either to rebuild the engine for 12k which was the mechanics estimate, he said may run into more problems in long run with scarred turbos from metal shavings in oil. So that's a no. Car is worth less. Next file a claim with insurance see if they total it due to disaster mechanical failure, which I have already done, and the last more logical just trade it in if I ever make it to car lot cuz on the way home from sh op it already broke down once.

I am running against the clock. Previous owner did not take good care of this car which is a shame for which I am to pay now. I love this car.Your car can vibrate, shake, and create various types of noises for different reasons.

If it particularly happens when you accelerate the engine, you can pin down the problems on common failures of several components. Knowing about them will help you with quick diagnosis and finding the correct fix before it gets worse. A bad torque converter could be the origin of rattling sound when accelerating at low speed.

If this happens, you should take the vehicle to a repair shop as soon as possible. The motor mount on the passenger side could be another obvious culprit. A ruptured mount will leak fluid everywhere. So, if you see dark lines of dripping oil underneath or on the frame next to the side mount, take it to a mechanic. You will need to have it diagnosed by a professional in that case. These components act as a thermo-reflective barrier between the exhaust system and other parts including gas tank, fuel lines, and the cabin of a car.

When they are loose or broken, they fail to completely block the heat transfer to these key areas.

As a result, you will hear frightening rattles at higher speeds. You have to inspect the exhaust system to find out if heat shields are causing rattling noise in car when accelerating. However, do it only when the engine is off for several hours.

The exhaust pipe and some other parts remain hot even after hours of switching the engine off. The speed of these pulleys escalates with the engine speed.

If they are slightly bent or loose, the metal-on-metal contact will create terrifying rattling sound when accelerating. Open the hood and inspect the V-belts when the engine is off and running. If a pulley is bad, the belt will show damage in the form of frayed sides. The rattling noise appears when you start speeding up from 0 to maybe 30 or 40 mph and then disappear after car speed surpasses 40 mph. In another circumstance, when your automobile is running at low speed the noise keeping coming out of car engine.

Moreover, you have the feeling that your car is holding back by something indefinable. What have you done in that situation? The culprit of rattling sound when accelerating mainly derives from car engine. Try to follow these instructions above and you will find your problem. Tsukasa Azuma is an awesome car blogger of Car From Japan. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. Login with Google.

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Import used cars directly from Japan. Maintenance Tips. By Tsukasa Azuma Last updated Nov 9, Tsukasa Azuma. Show Comments CFJ Kenya.Original Poster. Search My Stuff What's New 3 12 24 Vanos beginning to rattle - what are my options? Hi all, unfortunately, i seem to be experiencing the onset of vanos noise issues i think. Sorry for the barrage of questions, just need an idea where I stand with this and whether I need to start thinking of re-mortgaging the house etc!!!

Cheers, Tom. TonyRPH 10, posts months. I think you'll find all the help you need here. D 2, posts months. VANOS noise doesnt mean damage or drop in performance. Its just annoying.

e90 low rpm rattle

Thewebsite as above explains all. D on Wednesday 21st April Mr Whippy 22, posts months. The DISA flap thing can rattle too. My top-end sounded like it was rattling lots with the bonnet up, and even audible in the cabin around those same rpm's actually! Unplugged the DISA 12v feed and the engine rattling fell silent. I'd try that first. Thanks everyone for the responses, some helpful stuff in here. Mr Whippy said:. Have you checked the water pump?

Noisy bearings could be the problem - it was on my M52TU-engined E It offers some pulse tuning to the intake iirc, and also helps intake velocities at lower engine speeds. Iirc, the main chamber with the 6 intake ports is split by the DISA flap, and then that main chamber is fed by two intakes each, which both join to the main throttle body intake through another chamber.

So at low speed it acts like two 3 port intakes with good intake velocity and some pulse tuning through that 1st chamber.Discussion in ' Motors ' started by blunNov 11, Log in or Sign up. Overclockers UK Forums. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies.

Learn More. Show only OP. Nov 11, at PM 1. Hi I had BMW change the oil on my e90 i yesterday. I supplied the oil - Castrol Edge 0w I've just driven the car a bit today and have noticed a very loud and obvious vibration when the revs drop to around rpm eg when accelerating in 2nd from a very low speed. It didn't do this before the oil change. Could they have done something wrong or could this be related to the new oil?

Rattling sound from engine...SOLVED!

Last edited: Nov 11, Nov 11, at PM 2. Nov 11, at PM 3. Nov 11, at PM 4. Sorry should have been clearer.

Q: Strange rattling/tapping noise at low rpm when accelerating lightly

I dont normally accelerate from rpm in second! But doing that makes it easier to demonstrate the problem. You can also demonstrate it by pulling away gently in first when being gentle revs.

It definitley wasn't like this before it went in for the oil change. Nov 11, at PM 5. Have you read the error codes? Look out for ID10T - it's quite likely this is your issue. Nov 11, at PM 6. Your engine isn't designed to accelerate from rpm! Nov 11, at PM 7. I've mentioned this before when it had a different rattle at around rpm - which turned out to be the power steering pump bearings. People seemed surprised that it idles at about rpm. At 'low' RPMs the car was fine before the oil service and is now vibrating the entire car.

Something is obviously wrong.


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