Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

Leaking OIL injectors

Old 06-20-2012, 05:06 AM
  #1  
Registered User
Thread Starter
 
Join Date: May 2007
Location: Kiev, UKRAINE
Posts: 24
Likes: 0
Liked 0 Times in 0 Posts
Question Leaking OIL injectors

Hi all!

I've searched for this info, but couldn't find anything.

After taking apart my engine we've found out that all 4 oil injectors are faulty (you can blow through the vacuum hole)

The engine was torn apart because of low compression (~80psi each chamber both rotors).

When we torn apart the engine, inside it looked like all the wear was due to the insufficient oiling.

Two questions:
1) Do i get it right, if oil injectors are faulty, like described above, the engine will not get sufficient oiling, because some oil will be sucked into vacuum tubing?
2) What could be the reason of all 4 (!) injectors became faulty on a nicely maintained car with 52000km odo and oil changed every 5k km? No racing and only genuine oil and parts?

Thanks in advance.
Chief_MC is offline  
Old 06-20-2012, 05:20 AM
  #2  
Flame On!
iTrader: (4)
 
1.3_LittersOfFurry's Avatar
 
Join Date: Jan 2011
Location: New Orleans, La
Posts: 1,897
Likes: 0
Liked 0 Times in 0 Posts
IF you can "suck" air from the vacuum connection it is bad. Air should be able to flow from the vacuum line to the side that screws into the engine.


Originally Posted by ASH8 View Post
1.3_LittersOfFurry is offline  
Old 06-20-2012, 05:22 AM
  #3  
Registered User
Thread Starter
 
Join Date: May 2007
Location: Kiev, UKRAINE
Posts: 24
Likes: 0
Liked 0 Times in 0 Posts
Thanks, but I know the procedure and all 4 injectors are bad. That was not the question.
Chief_MC is offline  
Old 06-20-2012, 09:45 AM
  #4  
Flame On!
iTrader: (4)
 
1.3_LittersOfFurry's Avatar
 
Join Date: Jan 2011
Location: New Orleans, La
Posts: 1,897
Likes: 0
Liked 0 Times in 0 Posts
Sorry the way you described it, it seems like you were blowing air the wrong way for the test.

Not sure why it happened, I'll leave that to someone else...
1.3_LittersOfFurry is offline  
Old 06-20-2012, 09:50 AM
  #5  
Registered User
Thread Starter
 
Join Date: May 2007
Location: Kiev, UKRAINE
Posts: 24
Likes: 0
Liked 0 Times in 0 Posts
Thanks for your response anyway
Chief_MC is offline  
Old 06-20-2012, 11:34 AM
  #6  
Out of NYC
iTrader: (1)
 
nycgps's Avatar
 
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,866
Liked 11 Times in 11 Posts
So. R u actually blowing air thru or sucking air thru?
nycgps is offline  
Old 06-20-2012, 12:46 PM
  #7  
Registered User
Thread Starter
 
Join Date: May 2007
Location: Kiev, UKRAINE
Posts: 24
Likes: 0
Liked 0 Times in 0 Posts
Actually both air comes freely in both directions. They're faulty for sure.
Chief_MC is offline  
Old 06-22-2012, 07:17 AM
  #8  
Registered User
Thread Starter
 
Join Date: May 2007
Location: Kiev, UKRAINE
Posts: 24
Likes: 0
Liked 0 Times in 0 Posts
No ideas?
Chief_MC is offline  
Old 06-22-2012, 01:14 PM
  #9  
Flame On!
iTrader: (4)
 
1.3_LittersOfFurry's Avatar
 
Join Date: Jan 2011
Location: New Orleans, La
Posts: 1,897
Likes: 0
Liked 0 Times in 0 Posts
I think no one will answer because
1) first post you described (IMO) the wrong way to test. But you later stated you can blow air both ways, which does mean they are bad.

2) no one will really know as to "why" it happened. It could be anything really. Maybe it sat up for a long time and they gummed up. Maybe you do a lot of very short trips or do not drive the car a lot and try gummed up... Possibilities are endless really.
1.3_LittersOfFurry is offline  
Old 03-24-2015, 09:03 AM
  #10  
zoom-zoom
iTrader: (1)
 
Joe RX-8's Avatar
 
Join Date: Dec 2004
Location: Johns Creek, GA
Posts: 139
Likes: 0
Liked 0 Times in 0 Posts
Same problem

Just did a rebuild on mine after the engine blew. Engine wouldn't idle well after the rebuild. Often a vacuum leak problem causing this.

Tested the injectors on the engine using a vacuum pump, and all 4 are bad. Pulled them out and they test bad off the engine, too (I know this may be obvious to some of you).

No idea why all 4 would go bad at once. Engine rebuild shop said my bearings were trashed and wondered whether I had ever changed the oil (A: yes, religiously every 3k, plus premix at the track).

Mine's a 2004, 60k miles at rebuild.
Joe RX-8 is offline  
Old 03-24-2015, 09:59 AM
  #11  
Registered
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,739
Liked 335 Times in 270 Posts
Yeah two out of four were bad for me but that won't affect the bearings, what kind of oil did you use?
9krpmrx8 is offline  
Old 02-03-2019, 06:24 PM
  #12  
New Member
 
Join Date: Jan 2019
Posts: 7
Likes: 0
Liked 0 Times in 0 Posts
Can a bad oil injector also cause excessive blue exhaust smoke on some cold startup?? Or ANY startup for that matter ?
Eros Nunez is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Azki23
New Member Forum
12
06-27-2018 03:48 PM
WranglerFan
New Member Forum
4
11-05-2017 09:35 AM
Carbon8
RX-8's For Sale/Wanted
41
04-04-2016 04:05 PM
RevMeHarder
New Member Forum
5
09-22-2015 06:36 PM
WranglerFan
New Member Forum
0
09-05-2015 06:24 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: Leaking OIL injectors


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.