1998 740il part time smoke - BMW Forum - BimmerWerkz.com
1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 11-10-2011, 06:26 PM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
Smile 1998 740il part time smoke

My 740il sometimes would blow smoke ( at least once a day ) specially after a few miles driving it. I would hear a rattle, then white smoke will come out of the exhaust. I have been using sae5-30 oil, Car runs execellent and smoooth has 245k miles.

Any suggestion is greatly appreciated.
boomer1 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 11-12-2011, 05:13 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
The Rear Manfold Cover (aka OSV) on the M62 engine is a known weakness, although it is usually a puff of smoke on startup. You can test for a failed unit by starting the engine and then letting the idle settle, then pull the dipstick and listen for the idle to drop and then recover, and a slurping noise from the dipstick tube.

There is a good write up on this site which I followed. Rear Manifold Cover aka. OSV | BMW 740iL | Magnum

Its not a hard job if you are patient, but its a tight space to work on at the rear of the engine.


Riding in style
brettski is offline  
#3 (permalink) Old 11-12-2011, 10:32 AM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
Got it thanks.... I'll test today and let you know the outcome.

Last edited by boomer1; 11-12-2011 at 10:44 AM.
boomer1 is offline  
#4 (permalink) Old 04-07-2012, 09:27 AM
n00b
 
BadBmr's Avatar
 
Join Date: Apr 2011
Location: Central Ohio
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BadBmr is on a distinguished road
The same thing was wrong with my 2001 740. I followed Brettski advise and now it runs as good as new.

2001 740IL
BadBmr is offline  
#5 (permalink) Old 04-12-2012, 07:52 PM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
Thanks for the input. I bought the parts online and waiting for it. In the meantime, I noticed one of the rubber host attached to the manifold was bad. i changed it immediately and now I have less puff of smoke coming out and my check engine light went away.
boomer1 is offline  
#6 (permalink) Old 04-13-2012, 08:58 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
Do the dipstick check again to see if that has gone as well. Also check the gaskets around the intake manifold between the AMS and the throttle body.


Riding in style
brettski is offline  
#7 (permalink) Old 04-13-2012, 10:36 AM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Bloody good stuff, as always Brett


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#8 (permalink) Old 04-14-2012, 01:40 AM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
Will do. thanks.
boomer1 is offline  
#9 (permalink) Old 06-01-2012, 12:51 PM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
1998 740il partime Smoke.

after replacing the Crankcase vent ( rear intake Manifold ) I'm still getting part time smoke when starting in the morning, also when driving, it would hear a rattle sound then a puff of smoke.
The car runs great, idle is good. Any other ideas that might cause the part time smoke?

Thanks.
boomer1 is offline  
#10 (permalink) Old 06-01-2012, 06:03 PM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
So its white smoke, it could be something to do with the transmission breather?
Can you tell where the rattle noise is coming from?
How long does the rattling noise last for?
Can you force the noise to happen?
Will it only happen after a short period from take off?


Riding in style
brettski is offline  
#11 (permalink) Old 06-01-2012, 07:53 PM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
It would rattle under the car for a short period, then smoke would comeout on the tail pipe. It's more constant when the car is still bit cold. when it's been running for more than 15mins, it doesn't blow smoke.
boomer1 is offline  
#12 (permalink) Old 06-02-2012, 04:54 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
I have heard a rattle noise from my transmission on the first take off for the day when the transmssion is due for a service (not sure of the cause). The noise has disappeared each time I have had the oil and filter changed, but I hadn't noticed any smoke. Maybe get the transmssion serviced and have them check the breather line and related apparatus.


Riding in style
brettski is offline  
#13 (permalink) Old 06-03-2012, 12:34 AM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
Thanks for the suggestion. I'll try that. could it also be that I installed a bad Crankcase vent? I bought it in ebay cheap.
boomer1 is offline  
#14 (permalink) Old 06-03-2012, 01:37 AM
n00b
 
Join Date: Sep 2011
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
boomer1 is on a distinguished road
(Thread Starter)
in addition, How about the Oil Seperator Valve part#1115 1747 066? could possibly be blocked causing smoke when cold?
boomer1 is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 1,6,7,8 - Series and Mini Cooper


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
1998 740il boomer1 1,6,7,8 - Series and Mini Cooper 10 09-14-2011 06:43 PM
1998 bmw 740il seanjason New Members Check In 4 09-06-2009 12:04 AM
1998 Bmw 740il Bill_Clinton 1,6,7,8 - Series and Mini Cooper 1 04-10-2005 11:06 PM
White Smoke - 740i 1998 gm3mtm 1,6,7,8 - Series and Mini Cooper 2 10-01-2004 08:13 AM
'94 740iL Front Fender Part Dragging Billy Ray 1,6,7,8 - Series and Mini Cooper 1 09-12-2004 08:50 PM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome