Notices
General Miata Chat A place to talk about anything Miata

WTF oil on exhaust port?

Thread Tools
 
Search this Thread
 
Old Sep 25, 2012 | 08:05 PM
  #1  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default WTF oil on exhaust port?

Where is this oil coming from??? Above it is dry so I don't think it is from the valve cover. No drips, just what you see. It is on all 4 cyl.

Fresh motor... maybe 50 miles on it.

Attached Thumbnails WTF oil on exhaust port?-c67dcafb-2311-4fe2-85f6-f58af0c9572b-2726-0000051cd0344a56.jpg  
Old Sep 25, 2012 | 08:22 PM
  #2  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,197
Total Cats: 1,398
From: Oregon City, OR
Default

Weird. My head does that, but it just comes out as smoke, you can't see it until you take the manifold off and see the slightly oily valve stem. Is there smoke?
Old Sep 25, 2012 | 09:01 PM
  #3  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

Smoke after decel once I open the throttle back up. Quite a bit of it. Pretty sure I did a **** job re-building my T25. New valve seals and a shop built bottom end make me suspect the turbo or PCV as well. I do have an exhaust leak but I thought it was on the manifold-to-turbo side (****** gasket)

who knows.
Old Sep 25, 2012 | 09:48 PM
  #4  
hustler's Avatar
Tour de Franzia
iTrader: (6)
 
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Default

It's coming from your blown engine.
Old Sep 25, 2012 | 09:52 PM
  #5  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

No No hustler this car has a turbo... you wouldn't understand
Old Sep 25, 2012 | 10:42 PM
  #6  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,197
Total Cats: 1,398
From: Oregon City, OR
Default

Originally Posted by 240_to_miata
No No hustler this car has a turbo... you wouldn't understand
I lol'd IRL.

I personally have good luck with rebuilt heads (previously mentioned stem leak head has a lot of track abuse on it), but I know a lot of people have had bad luck with shops rebuilding heads. Don't rule it out.

The smoke on decel sounds more like what you said, PCV or turbo seals. Although I used a Gpopshop rebuild kit on mine with great success. And mine smokes on start up, after it's had a chance to sit and seep through the leaky #4 valve seal.

Decel smoke sounds like a recently rebuilt engine with lots of compression sucking past a dying PCV valve. Replace that first if you haven't already. Can you suck on it?
Old Sep 26, 2012 | 06:33 AM
  #7  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

I am going to replace/test it and see. I am still just confused on how the oil would be forming around the port. I cant physically feel an exhaust leak from there, but then again I do have one SOMEWHERE so I am not sure.
Old Sep 26, 2012 | 12:26 PM
  #8  
hustler's Avatar
Tour de Franzia
iTrader: (6)
 
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Default

Originally Posted by 240_to_miata
No No hustler this car has a turbo... you wouldn't understand
You can talk **** when you run within an hour of the SM record at your local track, homofag.
Old Sep 26, 2012 | 12:30 PM
  #9  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

:waits patiently for the post where he finally replaces the bad oil rings:
Old Sep 26, 2012 | 12:51 PM
  #10  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

LoL hustler easy... I never claim to be fast. My Turboed shutbox with me driving isn't even hitting spec times at limerock.

I'll do a leak down to shut everyone up on the motor issue... But no one has helped me figure out why oil would form OUTSIDE of my manifold.
Old Sep 26, 2012 | 01:02 PM
  #11  
hustler's Avatar
Tour de Franzia
iTrader: (6)
 
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Default

Originally Posted by 240_to_miata
LoL hustler easy... I never claim to be fast. My Turboed shutbox with me driving isn't even hitting spec times at limerock.

I'll do a leak down to shut everyone up on the motor issue... But no one has helped me figure out why oil would form OUTSIDE of my manifold.
Oil wicks-up through that "joint".
Old Sep 26, 2012 | 01:08 PM
  #12  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

Makes sense. I just figured it would be a large exhaust leak if oil was also able to wick up. I will first test the PCV and then get my hands on a leak down. Because the smoke comes when I open back up the throttle plate I really suspect its my turbo. I just really don't think(and hope) a professionally built motor would have ring or valve seal issues

Thanks for the answer
Old Sep 27, 2012 | 07:00 PM
  #13  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

-compression came in at 190-195 all around (supertech 8.6:1)
-charge pipes are bone dry.
-disconnecting the PCV hose from the IM and running a breather did nothing. My PCV is leaking though... so thats probably not helping

I still need to do a leakdown to CONFIRM its not the rings, but right now it looks like its either the valve seals (brand new) or the turbine. I suspect its the turbine because I had a hell of a time rebuilding it this time. The brass bushings were .001" oversized in my kit so I re-used my old ones (measured within spec). I also took my oil ring off the turbine side of the shaft only to realize I didn't have a replacement. I am not happy with how it went back on. I think THAT is the failure point.

CHURBO next year. for now I will probably continue to puff smoke while I pass emissions on the stock ecu/maf/inj/exhaust, etc.
Old Sep 27, 2012 | 07:25 PM
  #14  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,197
Total Cats: 1,398
From: Oregon City, OR
Default

What rebuild kit did you use? My gpop shop had awesome bearings and multiple rings in case the first one didn't fit.
Old Sep 27, 2012 | 07:41 PM
  #15  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

gpopshop. Never had an issue previous times with the brass bushings...but this time I mic'd them way oversized. I tried installing them and literally would have had to press them in. As for the oil ring, I might have a pic of which one it was, but there wasn't a similar one in the kit.

Either way, I am not crying about an upgrade.
Old Sep 27, 2012 | 08:06 PM
  #16  
Faeflora's Avatar
Elite Member
iTrader: (2)
 
Joined: Jan 2007
Posts: 8,682
Total Cats: 130
From: Los Angeles, CA
Default

your fresh motors fuked yo

i hope it is not built cus if so it doesnt deserve a log and t25 of fail
Old Sep 27, 2012 | 08:08 PM
  #17  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

LOL thanks Fae. Yes its built. It needed a rebuild and eventually it will see more than a log mani and t25.

Motor is fine, turbo is fucked, you guys are all bullies. . . lol
Old Sep 27, 2012 | 08:08 PM
  #18  
flounder's Avatar
Elite Member
 
Joined: Mar 2010
Posts: 1,524
Total Cats: 31
From: Detroit
Default

lol at homofag.
Old Sep 27, 2012 | 08:18 PM
  #19  
Faeflora's Avatar
Elite Member
iTrader: (2)
 
Joined: Jan 2007
Posts: 8,682
Total Cats: 130
From: Los Angeles, CA
Default

Originally Posted by 240_to_miata

Motor is fine, turbo is fucked, you guys are all bullies. . . lol
Please make motor happy and put goodie turbo on now
Old Sep 27, 2012 | 08:24 PM
  #20  
240_to_miata's Avatar
Thread Starter
Elite Member
iTrader: (2)
 
Joined: May 2007
Posts: 2,617
Total Cats: 16
From: Cromwell, Connecticut
Default

First I need to torture my motor by more or less going to stock to pass emissions... Then I will treat her well.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Full_Tilt_Boogie
Build Threads
84
Apr 12, 2021 04:21 PM
Corky Bell
Prefabbed Turbo Kits
18
Nov 22, 2016 09:01 PM
stoves
Suspension, Brakes, Drivetrain
5
Apr 21, 2016 03:00 PM
Aroundcorner
Miata parts for sale/trade
2
Oct 1, 2015 03:20 PM




All times are GMT -4. The time now is 10:45 PM.