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 > 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

Reply
 
Thread Tools Display Modes
  #1  
Old 09-26-2011, 06:25 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
compression test results I6 M54

Results of my compression test, 2003 530i 95k miles :

#1-135
#2-132
#3-130
#4-132
#5-133
#6-130



I did as Bentley manual said - just disconnect a DME relay, 6 strokes

so far i can see :
maximum difference is 5 PSI ( Bentley said 7 PSI is a max )

minimum compression is 130PSI where Bentley is 12 PSI above ( 142 PSI )
Here i am not sure if i did all correctly ( i am doing it the first time )

I just disconnected DME relay and didnt run engine to let it die to burn off the remaining fuel

B. Manual :
Low compression indicates a poorly seated combustion chamber


Last edited by champaign777; 09-29-2011 at 08:31 AM.
Reply With Quote
Advertisement
  #2  
Old 09-26-2011, 06:27 PM
cn90 cn90 is offline
Officially Welcomed to the 'Fest
Location: Omaha NE
 
Join Date: Mar 2006
Posts: 13,352
Mein Auto: 1998 528i 5-sp 140K+
Are you getting bored and looking for something to do?
Are there any symptoms, i.e., why are you doing a compression test?
Reply With Quote
  #3  
Old 09-26-2011, 06:31 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
you know i need new valve gasket ( my start to leak after 1 year )
so BTW doing compression test

also try to check why my 530i has some oil consuming ( 1q for ~3000 miles )

Last edited by champaign777; 09-26-2011 at 06:34 PM.
Reply With Quote
  #4  
Old 09-26-2011, 06:32 PM
Jim Rolando Jim Rolando is offline
Officially Welcomed to the 'Fest
Location: Missoula, Montana
 
Join Date: Nov 2009
Posts: 1,012
Mein Auto: 1999 528i
Quote:
Originally Posted by cn90 View Post
Are you getting bored and looking for something to do?
Are there any symptoms, i.e., why are you doing a compression test?
+1 Some times I just quit reading this forum or anything else about my car, because all it does is feed my inate neurosis and reduce the enjoyment of driving my perfect running Bimmer
.
Reply With Quote
  #5  
Old 09-26-2011, 07:18 PM
96 GGM 528I 96 GGM 528I is offline
Officially Welcomed to the 'Fest
Location: Cleveland OH
 
Join Date: Nov 2010
Posts: 241
Mein Auto: 1997 528I Daily
I'm pretty sure you are doing something wrong there. It should be around 200. Atleast my 190k car is. You need to crank it till the gauge quits climbing.
Reply With Quote
  #6  
Old 09-26-2011, 07:38 PM
edjack edjack is offline
Officially Welcomed to the 'Fest
Location: San Jose, CA
 
Join Date: May 2007
Posts: 10,833
Mein Auto: '97 540i 6 speed
... and prop the throttle open all the way.
__________________


Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
Reply With Quote
  #7  
Old 09-26-2011, 07:47 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 24,982
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by 96 GGM 528I View Post
I'm pretty sure you are doing something wrong there. It should be around 200.
I don't know if he's doing anything wrong or not; but this thread might help to provide reasonable procedures and corresponding results:
- How to test compression on a BMW E39 (1)
Reply With Quote
  #8  
Old 09-26-2011, 10:02 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
Quote:
Originally Posted by bluebee View Post
I don't know if he's doing anything wrong or not; but this thread might help to provide reasonable procedures and corresponding results:
- How to test compression on a BMW E39 (1)
i think there is a difference between 540 and M54 engine , its not the same

Last edited by champaign777; 09-26-2011 at 10:47 PM.
Reply With Quote
  #9  
Old 09-26-2011, 10:03 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
Quote:
Originally Posted by 96 GGM 528I View Post
I'm pretty sure you are doing something wrong there. It should be around 200. Atleast my 190k car is. You need to crank it till the gauge quits climbing.
again
540i is not M54 engine
Compression for M54 is low , 142 PSI as Bentley said
Reply With Quote
  #10  
Old 09-26-2011, 10:05 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
Did also WET test as *chitzo suggested
Full throttle
Charger
Hot engine

Results of my DRY compression test, 2003 530i 95k miles :

#1-135
#2-132
#3-130
#4-132
#5-133
#6-130

Results of my WET compression test, 2003 530i 95k miles :
one teaspoon of oil into each cylinder ( as Bentley said )

#1-138
#2-135
#3-133
#4-136
#5-137
#6-133

looks very similar to me

Last edited by champaign777; 09-26-2011 at 10:56 PM.
Reply With Quote
  #11  
Old 09-27-2011, 06:25 AM
96 GGM 528I 96 GGM 528I is offline
Officially Welcomed to the 'Fest
Location: Cleveland OH
 
Join Date: Nov 2010
Posts: 241
Mein Auto: 1997 528I Daily
Sorry for the confusion. I remember in the manual it gave the ratio specs as in 10.2:1. My gauge had those figures on it as well. Sorry again for the mis-information. Looks good to me then.
Reply With Quote
  #12  
Old 09-27-2011, 06:28 AM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
Quote:
Originally Posted by 96 GGM 528I View Post
Sorry for the confusion. I remember in the manual it gave the ratio specs as in 10.2:1. My gauge had those figures on it as well. Sorry again for the mis-information. Looks good to me then.
ya i need to rent another gauge from Autozone for double check
i glad i finally did it , study something new today

Last edited by champaign777; 09-27-2011 at 10:01 AM.
Reply With Quote
  #13  
Old 09-27-2011, 11:50 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 24,982
Mein Auto: 02 BMW 525i M54 auto 130K
This compression test today from an 01 330xi with 140k miles may be relevant:
- E46 (1999 - 2006) > Compression Test

Quote:
Originally Posted by bird_skier View Post
Just had one done on an 01 330xi with 140k. 221-220-225-223-221-225, do these seem high? I was expecting 160-180 range.
Reply With Quote
  #14  
Old 09-28-2011, 03:20 AM
poolman poolman is offline
Officially Welcomed to the 'Fest
Location: martinsville va
 
Join Date: Nov 2005
Posts: 4,303
Mein Auto: 525i station wagon
If your using 1 qt every 3000 miles--you should be thankful--lots are using 1 qt every 1000 miles an BMW says thats normal---
Reply With Quote
  #15  
Old 09-28-2011, 06:07 AM
piperguy piperguy is offline
Registered User
Location: Baltimore
 
Join Date: Aug 2010
Posts: 5
Mein Auto: 2002 530i Sport
Our 2002 530i Sport has used 1 qt/2000 since at least 50k miles (now has 108k). I don't consider that abnormal. As said above, BMW considers even 1/1000 or less ok. I wouldn't worry at all about 1/3000.
Reply With Quote
  #16  
Old 09-28-2011, 12:33 PM
cn90 cn90 is offline
Officially Welcomed to the 'Fest
Location: Omaha NE
 
Join Date: Mar 2006
Posts: 13,352
Mein Auto: 1998 528i 5-sp 140K+
1+,

1qt/3000 miles is fine. However my 1998 528i consumes no oil between 5-6K oil change.
I have revamped the entire CCV system, maybe that helps.
Car runs tight, zero problems.
Reply With Quote
  #17  
Old 09-28-2011, 08:21 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
told you Cam
you need to buy 530i its not the same as your 528i
Reply With Quote
  #18  
Old 09-28-2011, 08:25 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
Quote:
Originally Posted by bluebee View Post
This compression test today from an 01 330xi with 140k miles may be relevant:
- E46 (1999 - 2006) > Compression Test



thanks blue
there are much more info on euro sites about this staff so most of info i get there
also i was thinking that compression test is a very complicated procedure but i was wrong , It's actually pretty simple

Last edited by champaign777; 09-28-2011 at 08:32 PM.
Reply With Quote
  #19  
Old 09-29-2011, 05:00 AM
Quackers's Avatar
Quackers Quackers is offline
Learning all the time
Location: Manchester, UK
 
Join Date: Jul 2007
Posts: 545
Mein Auto: 540i
They're more than reasonable readings :-) Quite even and quite high I sould say.
__________________
I maybe paranoid but that doesn't mean they're not after me!

Reply With Quote
  #20  
Old 10-01-2011, 10:04 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
I did dry and wet test on my another M54

DRY compression test, 2001 525i 102k miles :

#1-128
#2-128
#3-123
#4-131
#5-131
#6-130

WET compression test, 2001 525i 102k miles :

#1-135
#2-135
#3-130
#4-139
#5-140
#6-140

as you can see both results are very close even on different M54 with the same miles ( both have ~100k )
i found out that indeed many parameters affect this data up to 10% ,- battery charge , throttle ,how much oil in cylinders when doing wet test , etc
I used a full throttle + hot engine + charger

Last edited by champaign777; 10-15-2011 at 03:42 PM.
Reply With Quote
  #21  
Old 10-15-2011, 03:41 PM
champaign777's Avatar
champaign777 champaign777 is offline
Officially Welcomed to the 'Fest
Location: Champ
 
Join Date: Nov 2009
Posts: 2,058
Mein Auto: 2003 530 Sport Twins
I found the reason of my low compression results for I6

The problem was in the way i did compression
The tester i used has 2 hoses -shorter "metal pipe" hose #1 and high pressure rubber hose #3



I used both of them as a one setup ( #1 and #3 )



I was wrong !!
On E46 forum one guy said this maybe the reason of a low compression result as some pressure maybe lost between these 2 connections mmm
So today i tried with a high pressure rubber hose ONLY ( #3 on picture )
My results were 45 PSI more than before !
So my 2003 530i result :

#1-180
#2-177
#3-175
#4-177
#5-178
#6-175

So when Bentley said minimum compression 10-11 BAR its indeed "minimum level of compression" for I6
Reading a log of info i found out that the normal compression for I6 is 11-13 BAR where my is around 12-12.5 BAR ( 175-180 PSI )

keep tuned

Last edited by champaign777; 10-16-2011 at 12:43 PM.
Reply With Quote
  #22  
Old 12-18-2012, 10:08 PM
gomolka30 gomolka30 is offline
Officially Welcomed to the 'Fest
Location: Philadelphia
 
Join Date: Nov 2012
Posts: 105
Mein Auto: 2001 530i
Sorry to resurrect a dead thread, but someone just gave me early Christmas presents, compression and fuel test kits.

One thing about the previous post, I don't think it would be due to losing pressure between connections, it's more of an issue of changing the combustion chamber volume. Every extra hose or adapter you fit between the spark plug hole and the gauge effectively adds volume to to the combustion chamber. Imagine running one long hose with the same volume as the cylinder (bore x stroke). This would effectively reduce your compression down to 2:1, and a PSI of about 30-40. So yes, the amount of hoses or adapters matters, but not because it is leaking between connections.

I was searching for m54b30 specs in PSI, but couldn't find any. Does anyone have these values? Also does anyone have the fuel rail pressure while you're at it?

Since not all testing setups are equal, I'd expect different setups to read different values even if all gauges are 100% accurate.

Last edited by gomolka30; 12-18-2012 at 10:13 PM.
Reply With Quote
  #23  
Old 12-19-2012, 05:26 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 24,982
Mein Auto: 02 BMW 525i M54 auto 130K
As most of you know, we try to pick an existing thread to make canonical, and then add references to new information to that one canonical thread (for reference efficiency), so I'm going to (relatively arbitrarily) list these two threads as the ones to go to for compression testing:

For the V8: > E39 (1997 - 2003) > E39 540i low compression
For the I6: > E39 (1997 - 2003) > compression test results I6 M54

In the bestlinks, I'll put this:
- How to test compression on a BMW E39 V8 engine (1) and on the I6 engine (1)

Quote:
Originally Posted by Flug540 View Post
I haven't done anything on the car probably almost since the last time I posted until about a week ago, which is several months, I had to get the mandated by the wife front yard project out of the way and had to travel for work several times.

The car runs 'fine' except for the missing boost part. I finally started working on it again, yesterday had a compression test done and was pleased to find that the original issue has been fixed:

#4 - 208 #8 - 208
#3 - 208 #7 - 206
#2 - 206 #6 - 205
#1 - 208 #5 - 206

Also tried testing the intake for leaks starting at the throttle body, filled the entire intake with smoke, but did not see it come out anywhere, and the boost gauge was showing what seemed to be correct pressure - about 6 psi. But I'm not so confident in the test itself, because I created a deliberate leak before the throttle body, could hear the air hissing, but no smoke... I'm guessing the smoke isn't dense enough to make it through the small hole? I'm going to to some modifications to the S/C side of the intake to eliminate some iffy parts and go from there.
__________________
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
  #24  
Old 06-09-2013, 11:12 AM
bimmerZ5 bimmerZ5 is offline
Officially Welcomed to the 'Fest
Location: San Diego, California
 
Join Date: Jan 2005
Posts: 206
Mein Auto: Z3 3.0i Rdstr, E39 530i
is there a DIY thread somewhere for doing compression test on E39 with M54 motor? specifically, how to get the car ready for the test... like disabling fuel pump or DME or both or? and where the relays or fuses are located and how to get to them?
__________________
Reply With Quote
  #25  
Old 09-18-2013, 11:29 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 24,982
Mein Auto: 02 BMW 525i M54 auto 130K
This compression test result was posted today:
Quote:
Originally Posted by Bmw94 View Post
So my car sounded pretty bad. I have a 2002 530i. It sounded like it was knocking pretty bad. It had a misfire also. So I ordered a new head gasket set, head bolts, exhaust manifold gaskets, spark plugs, fuel filter (I was going to go ahead and change this too, 150k miles), new 0w-40 Mobil 1 oil, and a new oil filter. I was basically going to do a big 150k checkup and replace anything I saw bad. So today my dad and I went out to check the compression. We thought maybe it was a burnt valve. We got the following readings:

Cylinder 1: 190psi
Cylinder 2: 190psi
Cylinder 3: 190psi
Cylinder 4: 190psi
Cylinder 5: 195psi
Cylinder 6: 190psi

We put in the new spark plugs while we were at it and it fixed the problem -_- . So now I have all these parts to rebuild the head and I don't need to. But it's okay because I'll just keep them for when I have to eventually. Also I am going to go ahead and replace the fuel filter and the oil. Anyways, are these readings bad? We unhooked the DME main relay and when I started it I put the gas to the floor like I read. The numbers seem very consistent for a car with 150k miles, but they also seem very high. Let me know what you guys think.

Also, my car sounds like it has the "marbles in a tin can" coming from right in the area of the oil filter housing or so. I replaces the VANOS seals with the Beisan aftermarket ones a few thousands miles ago. Any idea what this noise is?

Thanks in advance to anyone who can help.

See also:
- How to test compression on a BMW E39 V8 engine (1) and on the I6 engine (1)
__________________
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
Reply

Bookmarks


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


All times are GMT -7. The time now is 11:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms