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Old 09-25-2012, 09:05 PM   #1
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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.

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WTF oil on exhaust port?-c67dcafb-2311-4fe2-85f6-f58af0c9572b-2726-0000051cd0344a56.jpg  
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Old 09-25-2012, 09:22 PM   #2
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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?
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Old 09-25-2012, 10:01 PM   #3
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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.
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Old 09-25-2012, 10:48 PM   #4
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It's coming from your blown engine.
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Old 09-25-2012, 10:52 PM   #5
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No No hustler this car has a turbo... you wouldn't understand
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Old 09-25-2012, 11:42 PM   #6
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Quote:
Originally Posted by 240_to_miata View Post
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?
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Old 09-26-2012, 07:33 AM   #7
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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.
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Old 09-26-2012, 01:26 PM   #8
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Quote:
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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.
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Old 09-26-2012, 01:30 PM   #9
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:waits patiently for the post where he finally replaces the bad oil rings:
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Old 09-26-2012, 01:51 PM   #10
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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.
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Old 09-26-2012, 02:02 PM   #11
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Quote:
Originally Posted by 240_to_miata View Post
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".
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Old 09-26-2012, 02:08 PM   #12
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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
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Old 09-27-2012, 08:00 PM   #13
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-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.
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Old 09-27-2012, 08:25 PM   #14
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What rebuild kit did you use? My gpop shop had awesome bearings and multiple rings in case the first one didn't fit.
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Old 09-27-2012, 08:41 PM   #15
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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.
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Old 09-27-2012, 09:06 PM   #16
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your fresh motors fuked yo

i hope it is not built cus if so it doesnt deserve a log and t25 of fail
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Old 09-27-2012, 09:08 PM   #17
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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
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Old 09-27-2012, 09:08 PM   #18
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lol at homofag.
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Old 09-27-2012, 09:18 PM   #19
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Quote:
Originally Posted by 240_to_miata View Post

Motor is fine, turbo is fucked, you guys are all bullies. . . lol
Please make motor happy and put goodie turbo on now
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Old 09-27-2012, 09:24 PM   #20
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First I need to torture my motor by more or less going to stock to pass emissions... Then I will treat her well.
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