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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 08-08-2012, 05:51 PM
bmw335ionnet bmw335ionnet is offline
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Exclamation Strange Engine noise in 335i

Hello,
I've noticed a strange noise from my 335i(2008, automatic). Its like there is another motor/engine running under the hood. When the engine is turned ON, noise suddenly starts and its like as if the AC motor(just for reference) is running under heavy load. This issue be recreated while in Park and in Drive gear.The noise increases as if the load is increased and calms down in couple minutes. Tried this without AC being ON, and no difference. Hope the gurus here has an answer! Its out of warranty :-(. Any help is appreciated. Thanks for reading this post.
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  #2  
Old 08-08-2012, 06:20 PM
jburke4689 jburke4689 is offline
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There are two motors under the hood that you can hear. First is the cooling fan. That should be obvious. Open the hood and see if it is spinning. The other is the electric water pump. It is under the right hand side of the engine. It is pretty quiet but you can here it. If it is loud is may be about to fail.
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  #3  
Old 08-08-2012, 06:39 PM
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galahad05 galahad05 is offline
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Well that sucks. The electric water pump is a fairly expensive little thing.
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  #4  
Old 08-08-2012, 08:52 PM
bmw335ionnet bmw335ionnet is offline
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Thanks for the reply. Any idea how much it would cost me to get it replaced? I'm out of warranty 3 months ago(54k miles now), is it worth getting the extended warranty now?
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  #5  
Old 08-09-2012, 06:03 AM
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David1 David1 is offline
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If it is your waterpump, the fans will run faster than normal and loud. BMW covered mine on my X5 out of warranty.
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  #6  
Old 08-09-2012, 10:09 AM
Leekay07 Leekay07 is offline
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The water puimp gives little warning of faliure and the fans only turn on faster when its dead in the water

Just take it to BMW if they said it needs a replacement and they dont offer to cover it call BMW NA
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  #7  
Old 08-10-2012, 09:08 AM
bmw335ionnet bmw335ionnet is offline
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Thanks for your replies guys--my car stopped on road yesterday afternoon due to overheat! Had to tow it to the dealership, and yes its a water pump failure. Need to be replaced--whopping $1000 with labor! Dealership is coverin 50%, so looking at 500 for this. Looks like there are few more issues as well--transmission sleeve is leaking, to need to replace trans gasket, drain plug and fluid. And power steering fluid flush---all in all $1600 damage!!! Now i Wish i bought the extended warranty!!
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  #8  
Old 08-10-2012, 09:15 AM
Leekay07 Leekay07 is offline
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I wouldn't settle for paying anything out of pocket. Anything you pay out of pocket the dealer will pocket. Call BMW. Your allowed 10% outside your limited milage warranty because the mileometer is not always 100% accurate so unless you expired the 4 years your legally still covered under your 50,000 mile original warranty.

http://www.edmunds.com/auto-warranty...-warranty.html

Last edited by Leekay07; 08-10-2012 at 09:20 AM.
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  #9  
Old 08-10-2012, 11:07 AM
bmw335ionnet bmw335ionnet is offline
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Thanks Leekay07, just called BMW and they said they will get back to me in 5 days. Hope they can cover it.
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  #10  
Old 08-10-2012, 07:03 PM
jburke4689 jburke4689 is offline
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Leekay07 had an interesting point. If you have ever checked, you probably noticed that at 60mph indicated, your car is actually doing 56mph by GPS. That is a 7.1% difference indicated to actual. I does translate to the odomoeter as well. I means that when your odometer says 50,000 miles, you have actually only driven 46,540 miles. BMW knows this and will honor the warranty beyond 50,000 if you make a stink. I don't think you will get help beyond 4 years though.
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Old 08-10-2012, 11:22 PM
Leekay07 Leekay07 is offline
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I know about the mileage thing because back in 08 I was part of a Subaru class action law suit. Subaru cut us off at the mileage and offered no coverage beyond this. i paid for new caps for my wheels due to discoloring at 37,000 miles and was sent a check at the end of the class action for the amount paid. Now they will cover beyond the 36lk within the 3 year limit.
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  #12  
Old 08-13-2012, 07:13 PM
bmw335ionnet bmw335ionnet is offline
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Tried calling BMW as well, but they said the same thing--covered only 50%. Had to pay the rest :-(
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  #13  
Old 08-14-2012, 05:59 AM
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Quote:
Originally Posted by jburke4689 View Post
Leekay07 had an interesting point. If you have ever checked, you probably noticed that at 60mph indicated, your car is actually doing 56mph by GPS. That is a 7.1% difference indicated to actual. I does translate to the odomoeter as well. I means that when your odometer says 50,000 miles, you have actually only driven 46,540 miles. BMW knows this and will honor the warranty beyond 50,000 if you make a stink. I don't think you will get help beyond 4 years though.
The odometer is 100% correct. It gets its reading from the ECU which knows true road speed. What you see on the dash for MPH is intentionally made to read high by software.
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  #14  
Old 08-15-2012, 07:14 AM
bmw335ionnet bmw335ionnet is offline
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Guys, the exact same problem popped up ONE DAY after the repair. Engine overheating, fan running at high speed, and engine shut down! Cannot believe this!! Sent it to dealership, waiting for the diagnosis :-(
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  #15  
Old 08-15-2012, 12:56 PM
Leekay07 Leekay07 is offline
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Did they change the thermostate when they changed the pump?
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  #16  
Old 08-16-2012, 08:04 PM
bmw335ionnet bmw335ionnet is offline
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No they did not change thermostat. First, they said its the connector pins that went bad and asked me to pay for it. Now they are saying its the water pump that went bad AGAIN! Doesn't sound right to me :-(
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  #17  
Old 08-16-2012, 08:11 PM
Leekay07 Leekay07 is offline
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is it not fixed yet? If not have them change it.

Last edited by Leekay07; 08-16-2012 at 08:12 PM.
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  #18  
Old 08-16-2012, 08:14 PM
Leekay07 Leekay07 is offline
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And this cost outlay I wouldnt worry about the fact its failing so often someone somewhere is going to call a class action suit for them to deal with.
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  #19  
Old 08-16-2012, 09:37 PM
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galahad05 galahad05 is offline
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Quote:
Originally Posted by bmw335ionnet View Post
No they did not change thermostat. First, they said its the connector pins that went bad and asked me to pay for it. Now they are saying its the water pump that went bad AGAIN! Doesn't sound right to me :-(
Let them know that you are unhappy with the quality of their work. Let them know that your decision to come back with future work for them depends on how well they do here.

If they soak you with the cost, find yourself a reputable indy shop and never look back.
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  #20  
Old 08-17-2012, 11:44 AM
jburke4689 jburke4689 is offline
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Quote:
Originally Posted by David1 View Post
The odometer is 100% correct. It gets its reading from the ECU which knows true road speed. What you see on the dash for MPH is intentionally made to read high by software.
David1. Maybe on yours it is and that is what BMWNA told me. There was an easy way to check with a GPS so that is what I did. The odometer correlated exactly with the speedometer error. I dont' think I am the only one.
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  #21  
Old 08-17-2012, 11:47 AM
jburke4689 jburke4689 is offline
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If you were paying 100% they would have replaced the thermostat. I have never heard of the dealer not replacing the thermostat with the pump. Unbelieveable!
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  #22  
Old 08-18-2012, 06:47 PM
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David1 David1 is offline
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Originally Posted by jburke4689 View Post
David1. Maybe on yours it is and that is what BMWNA told me. There was an easy way to check with a GPS so that is what I did. The odometer correlated exactly with the speedometer error. I dont' think I am the only one.
What they told you is incorrect.
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  #23  
Old 08-21-2012, 01:22 PM
bmw335ionnet bmw335ionnet is offline
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It was indeed water pump failure-AGAIN!!!! So they've replaced it(all parts are under 2 year warranty), and the connector pins as well. Hope it wont trouble me again! Thanks for all your replies guys.
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  #24  
Old 08-21-2012, 01:55 PM
roadkillrob roadkillrob is offline
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Good luck, if the new one was faulty just really bad luck, it is also possible it was damaged during the install, either way it sucks to have to deal with it, but at least they have to cover the new faulty one 100%

Good Luck with it.
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  #25  
Old 08-31-2012, 07:04 AM
bmw335ionnet bmw335ionnet is offline
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Guys, its overheating AGAIN!!!!!!! Last time it shutdown itself, it was around temperature of 260 F. Now its 240F after like 30-45min drive around the town. I'm freaking out! Any clue what might've gone wrong?
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