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#1
03-16-2016, 07:19 PM
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Very loud "jet engine" noise from engine
We brought the e53 in for cooling system refresh and the car came back with a very loud engine noise. It does not sound healthy at all. Mechanic says "he did not cause the sound". The items that were replaced: -Waterpump -Thermostat -Several hoses Here's a link to a video of the sound- https://youtu.be/-n0Nc4DQXIE Any ideas? 
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#2
03-16-2016, 08:26 PM
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not good.............sounds like the timing is way off...........
__________________
 2006 4.8IS65K MILES PURCHASED 7/13
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#3
03-16-2016, 08:47 PM
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Sounds like W16
 Anyway...do not disturb the car.... noise is ugly! Sounds like there is no exaust pipes! It is hard to say anything just from noise...sounds like may be one candle at least is not working if u know what I mean! Ask...what they really did there!
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#4
03-16-2016, 09:09 PM
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Your mechanic sucks, find a new one, fast.
__________________
2000 E46 323Ci 5spd Sport 2001 E38 740iL Security 2002 E53 X5 3.0i 5Spd Sport 2003 E39 540i/6 MSport #501 Family Photo
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#6
03-16-2016, 10:20 PM
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I wouldn't drive it. Get it scanned and looked at by a good independent BMW mechanic.
__________________
Daily Drivers: - 2008 535i, 320,000km - 2004 X5 4.4, 01/2004 production, 420,000km - 1997 328i, 350,000km Track: - 1996 328i, track/race car, ~300,000km Winter: - 2013 Ski-Doo MXZ X 800 E-TEC, trail can - 2007 Ski-Doo MXZ Blizzard 800 HO - 2001 Ski-Doo MXZ 600 w/800 engine, exhaust - 1978 Ski-Doo Olympique 340 (vintage race sled) - 1977 Ski-Doo Olympique 340E 
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#7
03-16-2016, 10:42 PM
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There's an aluminum crossover pipe that connects the exhaust ports on the heads to the secondary (emissions) air pump. If it was left off or loose (or seals are missing) there would be an exhaust leak out the front of the engine. As you should imagine given the story here, that pipe has to be removed to change the parts you have recently changed.
__________________
David.X5 2001 X5 4.4i Sport SOLD! at 160k miles
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#8
03-16-2016, 11:22 PM
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+1^^^ What David.X5 says hits the spot
__________________
5G Ford Ranger Lariat 2022 E36/7 Z3 97 1.9 New project  E53 X5 4.6is 02  OFF to Bring a trailer soonLand Rover Disco 2 03 - sold Kawasaki Z900B 17- sold E53 X5 3.0 5M/T 01-sold-again E53 X5 4.4 05-the beast a 4.8tu swap. at 150k  -SOLDE83 X3 3.0-the wife's - sold R56 Mini Cooper S 07-sold E36 M3 97 - sold E36 M3 98-sold E39 528i 00-sold E30 318i 91-sold E36 M3 95-sold https://www.youtube.com/channel/UCcI..._as=subscriber 
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#9
03-17-2016, 01:09 AM
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Quote:
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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