3.0L burning oil - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
Go Back   Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum > Technical / Performance / Model > Mazda 6 1st Generation (2002-2008) > Engine / Drivetrain > 3.0L V6
New User? Register
Mazda6Club.com is the premier Mazda 6 Forum on the internet. Registered Users do not see the above ads.
User Tag List

Reply
 
LinkBack Thread Tools
Old 05-04-2010, 11:25 AM   #1 (permalink)
Registered User
 
mwalker46's Avatar
 
Join Date: Jul 2008
Location: Blenheim, Ontario
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Question 3.0L burning oil

hey guys, my car is burning a bit of oil, other than piston rings, valve stem seals, gaskets and the pvc what else can cause it to burn, compression is right on the money, plugs are dry as can be, replaced pcv valve twice to be sure, pulled valve covers off valve stem seals are great.. leak down test perfect, haven't checked my precats yet thats all thats left i think, i don't know what else can cause this.. any info would be awesome!! thanks
mwalker46 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-04-2010, 12:08 PM   #2 (permalink)
Registered User
 
tkemme's Avatar
 
Join Date: Jan 2010
Location: West Michigan
Posts: 585
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 17
Thanked 63 Times in 50 Posts
Groans: 0
Groaned at 2 Times in 2 Posts
iTrader: 0 reviews
Default

Please define "a bit" of oil? Is she smokin like a pig or are you just a little low at oil change time?
tkemme is offline   Reply With Quote Quick reply to this message
Old 05-04-2010, 01:39 PM   #3 (permalink)
Regional Moderator
 
Join Date: Jun 2003
Posts: 2,040
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Thanks: 7
Thanked 5 Times in 4 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

When I sold mine, I was putting half a liter in a week and I couldn't find any oil leaks at all. It only had 110,000km on it. Unfortunately, it was 10,000km over warranty.
__________________
VANCOUVER MAZDA6CLUB MODERATOR

2004 Mazda6 V6 GT GFX *SOLD* - AEM Cold Air Intake, black housing headlights and taillights
wing_woo is offline   Reply With Quote Quick reply to this message
Old 05-04-2010, 10:18 PM   #4 (permalink)
Registered User
 
Join Date: Apr 2010
Location: Elgin/Addison,IL
Posts: 137
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 5 Times in 5 Posts
Groans: 1
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default Me too

mine smokes alot so i would like to know also
gbojon is offline   Reply With Quote Quick reply to this message
Old 05-05-2010, 08:41 AM   #5 (permalink)
Registered User
 
mwalker46's Avatar
 
Join Date: Jul 2008
Location: Blenheim, Ontario
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

i have 91,000km's on it, burning maybe a little over a quart and a half or so... around there, its not smoking like a pig, it comes and goes, but when it smokes its just a puff here and there, not constant
mwalker46 is offline   Reply With Quote Quick reply to this message
Old 05-05-2010, 11:47 AM   #6 (permalink)
Registered User
 
tkemme's Avatar
 
Join Date: Jan 2010
Location: West Michigan
Posts: 585
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 17
Thanked 63 Times in 50 Posts
Groans: 0
Groaned at 2 Times in 2 Posts
iTrader: 0 reviews
Default

For trouble shooting I would go get a piece of clear or nearly clear plastic/rubber hose from Home Depot, Lowes or what ever your local building/plumbing supply store is and replace the PCV inlet tube that runs from just before the throttle body over to the front valve cover. Are you familar with how the PCV system works on our engine? With this in place you can easily see which way the air/oil vapor is flowing. The tube sould remain clean as air flows from the intake pipe down into the front valve cover. If you see oil vapor flow up from the valve cover back into the inlet, you have problems.
This is a great way to verify PCV valve operation. If you put a few drops of dark engine oil from the end of the dip stick into the end of the clear hose where it attaches just before the throttle body, it is easy to see which way and how fast the oil is being sucked. At idle it should be sucked very quickly down toward the valve cover. The flow should slow as the throttle valve is opened when you rev the engine. If the oil drops are blown back into the inlet at any point this is BAD!
tkemme is offline   Reply With Quote Quick reply to this message
Old 05-05-2010, 01:13 PM   #7 (permalink)
Registered User
 
mwalker46's Avatar
 
Join Date: Jul 2008
Location: Blenheim, Ontario
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

ok, and if oil is going back into the inlet, what does this tell me? how do i fix it?
mwalker46 is offline   Reply With Quote Quick reply to this message
Old 05-05-2010, 02:33 PM   #8 (permalink)
Registered User
 
tkemme's Avatar
 
Join Date: Jan 2010
Location: West Michigan
Posts: 585
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 17
Thanked 63 Times in 50 Posts
Groans: 0
Groaned at 2 Times in 2 Posts
iTrader: 0 reviews
Default

If the flow is from the valve cover back into the intake (at any rpm) then either: your PCV valve is stuck closed and you have some degree of piston ring blow-by (the rate of flow tells you how bad), or your PCV valve is fine and you have massive ring blow-by which is more than the PCV valve can vent by itself. ANY BACK FLOW IS BAD! If the flow is slight and you find your PCV valve stuck closed, your lucky and you just need a new valve. In the other case something in your engine is toast. All these test should be done with the engine warmed up.

Last edited by tkemme; 05-05-2010 at 02:38 PM.
tkemme is offline   Reply With Quote Quick reply to this message
Old 06-25-2012, 10:01 PM   #9 (permalink)
Learners License
 
Tsintsin-jingjing's Avatar
 
Join Date: May 2012
Location: New York, NY
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

My exhaust is pretty heavy also.

Definitely burning oil. Consuming quite a bit of oil. Maybe a quart a week.
__________________
2007 Dodge Caravan - the family hauler
2004 Mazda6S MT - my commuter
2003 BMW 325i - wife's commuter
Tsintsin-jingjing is offline   Reply With Quote Quick reply to this message
Old 06-26-2012, 09:08 PM   #10 (permalink)
Learners License
 
Tsintsin-jingjing's Avatar
 
Join Date: May 2012
Location: New York, NY
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

I've never used any of those Stop Leak or No Smoke engine treatments ... but then again, I think I'm losing about half a quart of oil a day.

You think that stuff would work?
__________________
2007 Dodge Caravan - the family hauler
2004 Mazda6S MT - my commuter
2003 BMW 325i - wife's commuter
Tsintsin-jingjing is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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



All times are GMT -4. The time now is 12:40 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2