Notices
Series I Trouble Shooting This is the place to learn more about or discuss any issues you're having with your RX-8

OMP Lines - Is there a check valve or should they flow freely?

Old Apr 14, 2014 | 06:20 PM
  #1  
ugabuga's Avatar
Thread Starter
Registered
 
Joined: Sep 2012
Posts: 54
Likes: 1
OMP Lines - Is there a check valve or should they flow freely?

So I have another thread about removing and cleaning my oil nozzles. Looks like they are ok. I removed the lines too and looks like the lines are all clogged.

I tried blowing through them and nada. Should they flow freely in either direction? I don't see why not.

I was able to stick a thin wire in the end where they connect to the OMP but the other side that goes to the injectors, the wire goes in the banjo bolt up to certain point and no furter ... feels like metal so I didn't push it. Is there a check valve in the banjo (not the bolt, the loop thing that goes arond the banjo bolt)
Reply
Old Apr 14, 2014 | 11:39 PM
  #2  
IRPerformance's Avatar
Former Sponsor
iTrader: (6)
 
Joined: Mar 2014
Posts: 129
Likes: 2
From: Monroe Township, NJ
The check valve is in the oil injector. The opening in the line itself is pretty small so it is difficult to blow though.
Reply
Old Apr 15, 2014 | 08:53 AM
  #3  
ugabuga's Avatar
Thread Starter
Registered
 
Joined: Sep 2012
Posts: 54
Likes: 1
Yes I knew that but what about the banjos?
I was able to stick in a fairly good size wire without any resistance from the side that connects to the OMP. The other side I get to a certain point and feel metal, so the wire can't go all the way through. If they are not clogged, the line is pretty wide. I shouldn't have any problems getting even a small amount of air through.

I tested with the other end submerged in water. Not even a bubble!
I guess I will soak them in degreeser while I check out the prices at the local dealer.
Reply
Old Apr 15, 2014 | 11:04 AM
  #4  
logalinipoo's Avatar
Driving my unreliable rx8
 
Joined: Oct 2012
Posts: 2,051
Likes: 7
From: Alvarado, Tx
Ir is correct. I would blow brake cleaner in them from the pump side to clean it out.
Reply
Old Apr 15, 2014 | 12:36 PM
  #5  
ugabuga's Avatar
Thread Starter
Registered
 
Joined: Sep 2012
Posts: 54
Likes: 1
Yeah that's what I plan on doing. Wasn't sure if brake or carb cleaner would be safe, but then again I have nothing to loose. I didn't have any carb cleaner last night, just brake cleaner and from what I've read carb cleaner is a little less harsh, especially on rubber parts.

Will try tonight and let you guys know how it goes. Otherwise ... $200-300 down the drain
Reply
Old Apr 17, 2014 | 11:10 AM
  #6  
IRPerformance's Avatar
Former Sponsor
iTrader: (6)
 
Joined: Mar 2014
Posts: 129
Likes: 2
From: Monroe Township, NJ
Carb/brake cleaner is fine.
Reply
Old Apr 23, 2026 | 04:56 AM
  #7  
rx-8up's Avatar
New Member
 
Joined: Apr 2025
Posts: 1
Likes: 1
digging this one back from the grave but i wanted make sure it was corrected for anyone with same question moving forward.

the banjo barbed connector on the injector side most definitely does have a ball check valve contained within and should limit oil to pass in one direction only... i found this out by taking the omp lines apart. Not sure where IR got his info as he didnt mention. random thread below confirming my suspicion.

https://www.rx8club.com/australia-ne...beware-217377/
Reply
Old Apr 23, 2026 | 01:09 PM
  #8  
200.mph's Avatar
FULLY SEMI AUTOMATIC
iTrader: (9)
 
Joined: Aug 2008
Posts: 5,952
Likes: 3,416
From: BALLS DEEP
i would like to mention that if using brake cleaner on plastic/rubber (not sure what the actual oil lines are) use non chlorinated stuff. ive seen the regular stuff eat rubber o rings
Reply
Old Apr 24, 2026 | 11:31 AM
  #9  
MincVinyl's Avatar
CEO of Morons Inc.
 
Joined: Jun 2017
Posts: 654
Likes: 224
From: New England
Yeah what material is in the oil injectors, I would be concerned with dissolving something you really dont want to.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gwailo
New Member Forum
38
May 14, 2024 06:57 AM
Sifu
RX-8 Parts For Sale/Wanted
3
Aug 30, 2015 10:51 PM


Thread Tools
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 08:22 AM.