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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-24-2012, 07:55 PM
jnesbitt jnesbitt is offline
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Location: Calgary Canada
 
Join Date: Apr 2012
Posts: 2
Mein Auto: 2006 540i sport
1997 540i engine knock after sitting for a year

I've got a 1997 540i sport that hasn't been started for a year. I fired it up today and after sounding a little rough the engine smoothed out. I shut it off then re-started it about 10 minutes later and it knocked really loud. I let it idle for about 5 minutes hoping it would smooth out again but it didn't. The knock stayed constant and loud. I don't know if this is a serious problem, or what. Any ideas if there is an engine product I need to add to quiet it down, or an adjustment of some kind? Any help would be appreciated!!

Last edited by jnesbitt; 04-24-2012 at 07:57 PM. Reason: wrong title
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  #2  
Old 04-24-2012, 08:45 PM
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jayster0966 jayster0966 is offline
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Location: Orange County, CA
 
Join Date: May 2011
Posts: 442
Mein Auto: E24 E39 E83
Sounds like the lifters went dry while sitting for a while. Pretty normal on cars that have not been started for a while. Make sure the oil level is proper and start her up and take her for a good run on a freeway or similar. Noise should go away after a couple of minutes. Lifters need to pump up and bleed out any air.
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Old 04-24-2012, 08:53 PM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 9,206
Mein Auto: '97 540i 6 speed
Possibly a failed chain tensioner. Don't drive it until you sort this out.
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  #4  
Old 04-25-2012, 04:14 AM
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Topaz540i Topaz540i is offline
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Location: Hillsborogh, NJ
 
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Mein Auto: 2001 540i/6
if its an actual engine knock your gas went stale.
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  #5  
Old 05-16-2012, 10:11 AM
jnesbitt jnesbitt is offline
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Location: Calgary Canada
 
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Mein Auto: 2006 540i sport
Hi Guys, thanks for your answers. I took it for a spin and the engine knock went away pretty quickly so it was probably dry lifters as suggested by jayster0966
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  #6  
Old 05-16-2012, 10:18 AM
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Topaz540i Topaz540i is offline
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Location: Hillsborogh, NJ
 
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Mein Auto: 2001 540i/6
An engine sitting that long is prob as dry as a rebuilt engine. The bmw procedure for a fresh (dry) engine is to start it and immediately raise the rpms to 4000rpms for about 10 seconds. This sounds like bad advice for a cold engine but the point is that the oil pump is run off the crank so you need to get it pumping oil thru the empty passages as fast as possible.
__________________
ESS Tuning m60 version software
m60 intake manifold
a.f.e. c.a.i.
3" obx catback
full powerflex urethane setup
545 ssk
cdv delete
m5 rear sway bar
M5 chassis rods
M5 3.15 lsd
Bc-r coilovers w/ swift springs
Akebono=suck
ss braided brake lines

coming soon:

Jb lwfw

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