Miata Turbo Forum - Boost cars, acquire cats.

Build Threads Building a motor? Post the progress here.

Aidan's loose oily bunghole actually runs a track lap

Thread Tools
 
Search this Thread
 
Old 05-16-2017, 09:52 PM
  #9541  
Senior Member
iTrader: (2)
 
wackbards's Avatar
 
Join Date: Nov 2015
Location: Seattle
Posts: 1,426
Total Cats: 266
Default
What's your air/oil separator situation? Is it plumbed back to draw vacuum from the intake manifold? You could splice in a clear piece of tubbing to see if it's drawing a ton of oil into the manifold.
wackbards is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-16-2017, 10:33 PM
  #9542  
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Posts: 2,381
Total Cats: 314
Default
What's the intake runners look like before the head. Any staining or film that you can feel?
bahurd is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-16-2017, 10:35 PM
  #9543  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
There is a coating. But it's mostly dry carbon (I didn't clean the intake mani that well before installing.) Not a lot of wet. I know some oil is getting through. But just picked up a new separator.
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 12:18 PM
  #9544  
Moderator
iTrader: (12)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 20,650
Total Cats: 3,011
Default
Supertech valve stem seals?
sixshooter is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 01:42 PM
  #9545  
Elite Member
iTrader: (4)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 4,648
Total Cats: 544
Default
Sorry I'm a bit new to the Supertech valve stem seal issues since it wasn't on my radar till now. They are known to fail prematurely?
psyber_0ptix is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 01:43 PM
  #9546  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
See here

https://www.miataturbo.net/engine-pe...ls-leak-93186/
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 03:27 PM
  #9547  
Elite Member
iTrader: (2)
 
ridethecliche's Avatar
 
Join Date: Aug 2016
Location: New Fucking Jersey
Posts: 3,890
Total Cats: 143
Default
Re: Rice sound for det.

You should only be able to hear it with det cans and it shouldn't happen during decel right? I think my intake filter vibrates at certain rpms due to the resonant frequency and it has scared the crap out of me before because it sounds like an angry swarm of bees.
ridethecliche is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 05:12 PM
  #9548  
Supporting Vendor
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Lake Forest, CA
Posts: 7,950
Total Cats: 1,003
Default
I think your car is definitely detonating on decel.
__________________
Ed@949Racing/Supermiata
www.949racing.com
www.supermiata.com
turbofan is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 05:17 PM
  #9549  
Senior Member
 
farpolemiddle's Avatar
 
Join Date: May 2016
Location: Lents, Oregon
Posts: 584
Total Cats: 95
Default
I too am interested in if this is a Supertech valve stem seal issue since I was planning on doing mine soon.
farpolemiddle is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 05:27 PM
  #9550  
Elite Member
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
Default
You should come visit the sthupertech valve stem seal thread: https://www.miataturbo.net/engine-pe...ls-leak-93186/
EO2K is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 06:09 PM
  #9551  
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Posts: 2,381
Total Cats: 314
Default
Curious @aidandj did you happen to measure your valve guides when the head was refreshed and also seat to guide runout? Valves are new right?
bahurd is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 06:11 PM
  #9552  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
Head is used. Ran fine before rod knock. I lapped the valves and called it a day.

It was cleaned and decked obviously.
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 07:55 PM
  #9553  
Elite Member
iTrader: (2)
 
ridethecliche's Avatar
 
Join Date: Aug 2016
Location: New Fucking Jersey
Posts: 3,890
Total Cats: 143
Default
Originally Posted by turbofan
I think your car is definitely detonating on decel.
Given my luck the past few days, I'd believe it.
ridethecliche is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:48 PM
  #9554  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
Cool.

Name: RDuUD0D.jpg Views: 9 Size: 1.70 MB
Name: zEyA17W.jpg Views: 9 Size: 2.12 MB
Name: 2cBJleb.jpg Views: 9 Size: 1.89 MB
Name: cnq2l0m.jpg Views: 9 Size: 2.09 MB
Name: RC6uR3k.jpg Views: 9 Size: 1.97 MB
Name: gl0UwNJ.jpg Views: 9 Size: 1.10 MB
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:48 PM
  #9555  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
Exhaust side seems fine

Name: tW8YOa8.png Views: 9 Size: 1,012.3 KB
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:50 PM
  #9556  
Elite Member
iTrader: (37)
 
EO2K's Avatar
 
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,441
Total Cats: 1,899
Default
The **** is that ****? FOD?
EO2K is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:54 PM
  #9557  
Supporting Vendor
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Lake Forest, CA
Posts: 7,950
Total Cats: 1,003
Default
what he said ^
__________________
Ed@949Racing/Supermiata
www.949racing.com
www.supermiata.com
turbofan is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:55 PM
  #9558  
SADFab Destructive Testing Engineer
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
Total Cats: 1,866
Default
Not sure yet. Currently trying to decide if I should get some new ones overnighted, or toss some stock shim over buckets in. Looks like 4 or 5 total are damaged.
aidandj is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 08:56 PM
  #9559  
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,479
Total Cats: 104
Default
I forgot you were on SUBs and I was just going to say to flip those shims over and go.
Leafy is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 05-17-2017, 09:07 PM
  #9560  
Elite Member
iTrader: (21)
 
rleete's Avatar
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 6,593
Total Cats: 1,259
Default
Looks like metal deposition, rather than damage. What do your pistons look like?
rleete is online now  
Reply
Leave a poscat 0 Leave a negcat



Advanced Search
Quick Reply: Aidan's loose oily bunghole actually runs a track lap


Reply Closed Thread Share

All times are GMT -4. The time now is 09:14 AM.