Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > 5 Series DIY

5 Series DIY
Knowledge Is Power! ~ The place for do-it-yourself threads on a variety of topics. Start a thread describing a particular job (oil change, cooling system overhaul, brakes, shocks and springs, etc.) or search for one you need help with!

Reply
 
Thread Tools Display Modes
  #1  
Old 03-18-2005, 09:16 PM
rhinom67 rhinom67 is offline
Registered User
Location: Greenville, SC
 
Join Date: Mar 2005
Posts: 55
Mein Auto: 03 330CI
Random knocking

528i knocking noise (not coming from the engine). Sounds like its coming from the pass side of engine compartment, close to the box behind pass side headlight. The noise is intermittant. Anyone know what this is?
Reply With Quote
Ads by Google
  #2  
Old 03-21-2005, 05:19 AM
Toxic Toxic is offline
Officially Welcomed to the 'Fest
Location: Ireland
 
Join Date: Oct 2003
Posts: 37
Mein Auto: 97 523i
More than likely the bushings in the control arms are needing replacing.

It would help if you posted year/mileage and any suspension work previously done on the car? When does it happen, etc, etc?
Reply With Quote
  #3  
Old 03-22-2005, 11:18 PM
rhinom67 rhinom67 is offline
Registered User
Location: Greenville, SC
 
Join Date: Mar 2005
Posts: 55
Mein Auto: 03 330CI
Its a 98 with only 58k on it. It happens while at idle and sometimes while driving. Not coming from the engine though. I currently have it at the shop because it runs hot at stoplights. This may have something to do with it.
Reply With Quote
  #4  
Old 03-25-2005, 11:23 AM
Toxic Toxic is offline
Officially Welcomed to the 'Fest
Location: Ireland
 
Join Date: Oct 2003
Posts: 37
Mein Auto: 97 523i
those thrust arm bushes typically last 60k miles, so if you want to check them do the following:

Stop the car and turn the steering wheel one full turn either direction to display the tyre thread.

Give the tyre on the thread section a good kick and if the wheel rocks back & forth more than 2-3mm, it's those bushes.
Reply With Quote
  #5  
Old 04-01-2005, 09:29 PM
rhinom67 rhinom67 is offline
Registered User
Location: Greenville, SC
 
Join Date: Mar 2005
Posts: 55
Mein Auto: 03 330CI
Thanks for the info on the bushings. I'm pretty sure the noise I was hearing was from the radiator. The tech's said that there was some air in the radiator, so they burped it. I haven't heard the noise yet.
Reply With Quote
  #6  
Old 04-03-2005, 03:16 PM
rhinom67 rhinom67 is offline
Registered User
Location: Greenville, SC
 
Join Date: Mar 2005
Posts: 55
Mein Auto: 03 330CI
The vehicle is now making a low vibration right at start up. This noise stops after the vehicle warms up. I'm hoping a flush and fill of the coolant will take care of this problem. Any one know any other ideas, or experienced the same problem???
Reply With Quote
  #7  
Old 04-04-2005, 08:35 PM
sehiser sehiser is offline
Registered User
Location: Toledo, OH
 
Join Date: Apr 2005
Posts: 7
Mein Auto: 528i
Doesn't sound good man.

If the engine was overheating you could have caused some damage, especially if it's vibrating now.

I'd really have it checked out, I'd hate to take stabs at what the problem is and have you burn your engine up.

If it was overheating it could have caused some excess wear on your internal engine parts, like your pistons or rods. Usually the first thing to go is the rod bearings though. Being that your coolant really doesn't do much for the first few minutes it sounds like a mechanical problem.

It sounds to me like once the engine warms up (which causes metal to expand) whatever it is has worked itself out. So if there was some excess wear caused by overheating, after the engine warms up it has expanded to stop the vibration.

On the lighter side, your water pump could be shot. That could also make sense because if it was overheating the water pump may have just been corroded. In that case when your car first starts it could be hesistating to turn the blades on the water pump. (Kind of like a really old fan that starts to stick when you turn it on and you need to give the blades a whap).

Waterpumps get mis-diagnosed a lot. Usually the mechanic says it just needs a flush or the radiator is clogged.

If you want to check it yourself, disconnect the large hose coming off your water pump from your radiator. Have it aimed at a large bucket while somebody starts your car for a few seconds and shuts it down. It should have a pretty strong flow of coolant into the bucket, if it doesn't then your waterpump is bad. Get it fixed immediately.

I won't even talk about piston wear or rod bearings (usually when these have problems there is a tapping noise) because that required a complete engine rebuild IF the engine can be saved.

One thing you could try, but I don't think it works on BMW's is turning on your heat. If you don't feel heat then your coolant isn't circulating. I think BMW's have a separate system for heating though, which makes this method ineffective. However, if you notice your engine temp getting high you should turn on your heat full blast to help cool your engine.

The best thing to do is just pull over. If the temperature is REALLY high let your car idle for 5 minutes before shutting it off. When you shut an engine off there is "heat swell", which means the engine temperature continues to rise. By letting it idle the strain on the engine is gone which doesn't create as much heat, so as long as some coolant is moving it will help cool your engine before you shut it off, and DO shut it off unless you want to cough up $6k for a rebuild.

This is good advice for anybody who finds themselves in an overheating position.

As far as checking your tires, good tip there. One thing I see 99% of drivers do is turning their wheels while the car isn't moving. You should be moving forward or backwards when turning your steering wheel, otherwise your putting a lot of stress on your tierods and power steering unit which leads to early problems. By letting your car roll forward even 1 foot while turning your tire, you're increasing the life of your steering components.

It's just never a good idea to turn your tires if your car is at a complete stop. The more and more advanced our cars get and the more and more dependable they become, the more and more people will take things for granted. I'd put money on it that most of the people reading this never knew you weren't supposed to turn your steering wheel while your car isn't moving. It won't kill it, but it does put additional stress on the components (components are a lot better today).

Scott
Toledo, OH
Reply With Quote
  #8  
Old 04-06-2005, 04:14 PM
rhinom67 rhinom67 is offline
Registered User
Location: Greenville, SC
 
Join Date: Mar 2005
Posts: 55
Mein Auto: 03 330CI
I just bought the car a few weeks ago, so I added the extended warranty to the car. I paid a little over 2000 for it, but it will probably be worth it. It covers a good portion of the mechanical and electronic equipment for 3yrs or 36k miles!!! I just have to keep the receipts for the routine maintenance.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > 5 Series DIY
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Some random pics of my X5... FrankTheTank X5 E53 (1999 - 2006) 12 01-22-2005 06:21 AM
Random Poll! Curious Joel X5 E53 (1999 - 2006) 10 10-05-2004 07:19 PM
Knocking sound from under car, foot not on clutch, trans in neutral = problem? Moderato 3 Series / 4 Series 8 04-12-2004 07:48 PM
Alpine CD Changer All Disc Random Mode LDV330i Car Navigation, Audio & Electronics sponsored by BimmerTech 0 01-13-2004 03:37 PM
OEM CD Changer Random Mode Question Zappo Car Navigation, Audio & Electronics sponsored by BimmerTech 0 12-13-2003 11:04 PM


All times are GMT -7. The time now is 04:53 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms