E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 12-18-2014, 05:00 PM   #1
victorsal
Registered User
 
Join Date: Sep 2011
Location: houston
Posts: 49
My Ride: bmw 325ci and 325i
Send a message via Skype™ to victorsal
Smoke from opening oil cap.

I'm not sure what's going on with my car but it won't reach temp until I drive a hour or more. And when it does it idles rough at idle. 325ci stick
Smoke comes out of the oil cap when I take it off after driving 15 miles or so.
victorsal is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 12-18-2014, 05:01 PM   #2
victorsal
Registered User
 
Join Date: Sep 2011
Location: houston
Posts: 49
My Ride: bmw 325ci and 325i
Send a message via Skype™ to victorsal
I'm using 0-40w mobile one. I live in Texas.
victorsal is offline   Reply With Quote
Old 12-18-2014, 05:08 PM   #3
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,172
My Ride: '06 330CiC, '03 M5
Smoke/vapor coming out of the crankcase is pretty normal.

Read the 3rd link below in my signature about engine temperature, soft thermostats and Mayo build up in the crankcase.

Use the Hidden OBC Menu to verify the proper engine temperature.
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote
Old 12-18-2014, 05:32 PM   #4
jcns
Registered User
 
Join Date: Oct 2008
Location: California
Posts: 1,573
My Ride: California
your thermostat could be stuck open preventing the car from reaching optimum temp range.
drive your car, get temps up to range.
Speed up to say 55mph ideally on a downhill. put it in neutral. If temps drop, i am pretty sure your thermostat is done.
jcns is offline   Reply With Quote
Old 12-19-2014, 10:32 AM   #5
Zell
Registered User
 
Zell's Avatar
 
Join Date: Jun 2009
Location: wow such city
Posts: 5,788
My Ride: Has no throttle
It's normal. Every car I've ever had has done that.
__________________
Zell is offline   Reply With Quote
Old 12-19-2014, 10:35 AM   #6
WDE46
Registered User
 
Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 9,471
My Ride: 2004 330Ci OBM
Quote:
Originally Posted by jcns View Post
your thermostat could be stuck open preventing the car from reaching optimum temp range.
drive your car, get temps up to range.
Speed up to say 55mph ideally on a downhill. put it in neutral. If temps drop, i am pretty sure your thermostat is done.
Doesn't matter if it's in neutral or going down a hill.
__________________
BMW VIN Decoder

Common Sense is officially dead.
WDE46 is offline   Reply With Quote
Old 12-19-2014, 12:35 PM   #7
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 7,479
My Ride: '94 325iC & '00 323i
The OP is describing a t-stat that sticks open. This is why it takes so long for the car to warm up.

The smoke/vapor rising from the oil filler cap is pretty normal. It's certainly not part of the long warm up issues.
jdstrickland is offline   Reply With Quote
Old 12-19-2014, 12:43 PM   #8
Grande D
Registered User
 
Join Date: Dec 2006
Location: Dirty South
Posts: 3,392
My Ride: E90 M-Sport
It shouldn't look like dark smoke, more like light vapor.

Otherwise



I second the T stat failure, it's common on E46s. If you drive on the highway after the car is warmed up for an hour or so, will the temperature creep back down? If so then it's definitely the t-stat. Coolant should reach temp after no more than 10 minutes in an E46.
__________________


"All lies and jest, still a man hears what he wants to hear and disregards the rest."
Grande D is offline   Reply With Quote
Old 12-19-2014, 12:52 PM   #9
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 7,479
My Ride: '94 325iC & '00 323i
When my t-stat stuck open, I was on the freeway and the temp needle dove to blue as if the power was removed from the circuit. Well, not quite that fast, or far, but it fell quickly at freeway speeds. I was only 10 minutes from the house.

If the temp falls fast, then the t-stat is stuck open. If the temp climbs when the car is not moving, but falls back to normal when the car is moving, then you are facing a fan clutch that's reached end-life.
jdstrickland is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is ON





All times are GMT -5. The time now is 10:04 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use