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Possible New Renesis Engine Failure Theory?

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Old 06-22-2011, 06:49 AM
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Originally Posted by Rudolph
This is what I was looking for. Thanks!

Now let's hope I misread the dipstick and the car is actually burning oil...time to drive hard to accelerate the results!
Old 06-22-2011, 07:43 AM
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Looking at buying and RX8...

How often should the oil lines/OMP/oil injectors be replaced?

(will be my first time owning a rotary!)
Old 06-22-2011, 07:53 AM
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Originally Posted by maxchao
Interesting Rudolph. In that case it would justify my slow 4 stroke oil consumption. I had oil change on 6/2, then I premixed 1 oz per gallon when I had autocross on 6/5, and after that I returned to 1/2 oz per gallon. I checked dipstick on 6/9 and I think I might have read the wrong side of dipstick lol so I thought the level is 3mm below full but it might have been 3mm before the 'top' of the wrong side of dipstick. I then took a long distance highway drive ~400 miles and when I returned the oil level is 3mm below full (this time I'm sure). Yesterday I waited an hour after the engine shut off before I checked the dipstick and it's in the same spot. Then I posted here. Then I thought maybe the oil level increases with time so today I checked again and it's at around 8mm below full.

So if 1. I misread the dipstick the first time 2. The oil consumption on highway is really low 3. oil level on dipstick increases with time after the engine is shut off and 4. premix got into the 4 stroke, then it is still burning oil. I have been driving the car a little soft lately because the weather maybe that will contribute as well. Anyway I will change the injector when I get a chance but I guess it can wait a little longer. (moving to a place with garage now. )

Quite a lot of assumption and quite a lot of rambling. Sorry guys. :P
before replacing your OMP injectors I would try to run some seafoam trough them. That might do the trick..use the OMP line from the throttle body boot:

https://www.rx8club.com/series-i-tech-garage-22/optional-ports-seafoam-omp-nozzle-cleaning-217177/


Last edited by Nadrealista; 06-22-2011 at 07:58 AM.
Old 06-22-2011, 09:03 AM
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Originally Posted by Nadrealista
before replacing your OMP injectors I would try to run some seafoam trough them. That might do the trick..use the OMP line from the throttle body boot:

https://www.rx8club.com/showthread.php?t=217177

Old 06-22-2011, 09:25 AM
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Originally Posted by MarkLinRacing
Looking at buying and RX8...

How often should the oil lines/OMP/oil injectors be replaced?

(will be my first time owning a rotary!)

There is so set answer for this but mine were done at about 124,000. The lines were very brittle and broke and the oil injectors failed testing.
Old 06-22-2011, 09:47 AM
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Originally Posted by 9krpmrx8
is picture I posted not clear enough? there is slight vacuum on that line so you can suck in seafoam with it and it should clean the omp injectors..I think doing it is a good preventive maintenance to ensure fully operational OMP nozzles.

from my other thread:
"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumtion wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compresion tester here."

Last edited by Nadrealista; 06-22-2011 at 09:49 AM.
Old 06-22-2011, 10:24 AM
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Sorry buddy, but have you ever had one of these injectors in your hands? If it fails the vacuum test it fails the vacuum test it is because the internal seals have failed. Putting seafoam in them is not likely going to help fix them and sure as hell will not prevent them from dieing. Not to mention there is no real vacuum there. And even if you poured seafoam down in there I doubt it would have enough pressure to make it all the way through the injector. But I have them laying around, I will do an experiment just for you.

Go back and read pages 1-2 of this thread.

Last edited by 9krpmrx8; 06-22-2011 at 10:29 AM.
Old 06-22-2011, 11:21 AM
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I slightly free'd one up by spraying it with carb cleaner and letting it sit overnight. Even then it still wasn't completely free, once these things get stuck they are pretty much cooked.
Old 06-22-2011, 11:22 AM
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what if they are not working properly due to the oil/crud/carbon deposits..either way it will not hurt him to try it before replacing parts. running seafoam trough the OMP nozzles will clean them and their respective lines. it is simple and easy to do..all it takes is a can of seafoam and some time. I would do it 3 times couple days apart by using the 1/3 of the bottle each time since these deposits can be stubborn and it might take more then one try to dissolve them.

Last edited by Nadrealista; 06-22-2011 at 11:28 AM.
Old 06-22-2011, 11:54 AM
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Originally Posted by Nadrealista
what if they are not working properly due to the oil/crud/carbon deposits..either way it will not hurt him to try it before replacing parts. running seafoam trough the OMP nozzles will clean them and their respective lines. it is simple and easy to do..all it takes is a can of seafoam and some time. I would do it 3 times couple days apart by using the 1/3 of the bottle each time since these deposits can be stubborn and it might take more then one try to dissolve them.

You need to take a good look at the system man, you are missing some info. Even if you can get the seafoam to the injectors (highly doubtful) there is no way for the seafoam to get into the omp lines. Not mention the plastic vacuum block that all the OMP vacuum lines feed off of is also prone to getting brittle and I am not sure how well it would take to having seafoam sitting in it.
Old 06-22-2011, 12:10 PM
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read this again:

from my other thread:
"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumption wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compression tester here."
Old 06-22-2011, 12:52 PM
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Originally Posted by Nadrealista
read this again:

from my other thread:
"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumption wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compression tester here."

Whatever man, you are just not getting it. You have never taken this stuff apart so maybe that is why you don't see it.
Old 06-22-2011, 02:56 PM
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The oil nozles have a ball and seat type valve in them....

I had good luck cleaning them in an ultrasonic bath and then carefully blowing them out with compressed air

You have to be careful with the air though..you can easily stick the valve open with too much air pressure. If they don't hold vac...try carefully blowing air in them to loosen the ball and you can be good to go. I had 6 of 8 fail the vac test....and the cleaning got them all working properly. I then used some high temp silicone to lubricate the ball valve So far they seem good to go
Old 06-22-2011, 03:08 PM
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Originally Posted by dannobre
The oil nozles have a ball and seat type valve in them....

I had good luck cleaning them in an ultrasonic bath and then carefully blowing them out with compressed air

You have to be careful with the air though..you can easily stick the valve open with too much air pressure. If they don't hold vac...try carefully blowing air in them to loosen the ball and you can be good to go. I had 6 of 8 fail the vac test....and the cleaning got them all working properly. I then used some high temp silicone to lubricate the ball valve So far they seem good to go
Yeah I was going to cut one open this weekend just to see exactly what was inside but either way they can't be cleaned by pouring sea foam down the vacuum hose while the engine is running.
Old 06-22-2011, 03:44 PM
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I say they can..read in bold letters:

"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumption wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compression tester here."

it is clear that seafoam was getting into combustion chamber trough the OMP nozzles, hence they can be cleaned with it..
Old 06-22-2011, 03:50 PM
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Originally Posted by Nadrealista
I say they can..read in bold letters:

"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumption wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compression tester here."

it is clear that seafoam was getting into combustion chamber trough the OMP nozzles, hence they can be cleaned with it..

Okay If you say so.
Old 06-22-2011, 08:08 PM
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Originally Posted by Nadrealista
I say they can..read in bold letters:

"okay so i tried the OP's idea out and heres my results. I took the vacuum line from the intake accordion that leads to the OMP nozzles. i noticed it had some suction to it but NOT like normal engine idle vacuum from behind the throttle plate. but with my thumb over it it definetly had some kind of suction to it. SO i poured about one tablespoon in it and went to the back of the car and smelled the seafoam being burned so i went and poured about an ounce of seafoam into the vacuum line. the engine started to stumble very slightly so i put my thumb over the tube again and let it build negative pressure and then released my thumb to let the seafoam continue thru the nozzles. Results oil consumption wise is that my oil level dropped more than normal. BUT by normal that was MY car which has had low oil consumption so now i have stopped premixing and just let it be. as for idle it idles a little higher than 800 now. prior was steady at 775-800ish now its solid above 800-875ish. sorry no compression tester here."

it is clear that seafoam was getting into combustion chamber trough the OMP nozzles, hence they can be cleaned with it..

It might help...but it won't clean them out completely. It can't access the area the oil feed comes from....the only real way to clean is the ultrasonic bath...like they clean fuel injectors

Last edited by dannobre; 06-26-2011 at 08:38 AM.
Old 06-22-2011, 08:37 PM
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as i understood it the vacuum was built from in intake side of that hose... not the OMP side.
Old 06-22-2011, 09:53 PM
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Well I will let you guys fight and mean while wait to see if I'm really burning oil...lol
Old 06-23-2011, 09:00 AM
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I am going to try it myself. my point is: if you clean OMP whenever you seafoam your car (which should be at least once a year) that will prevent OMP clogging in the first place..just like with everything else prevention is the way to go!
Old 06-23-2011, 09:09 AM
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Originally Posted by WingleBeast
as i understood it the vacuum was built from in intake side of that hose... not the OMP side.

Yeah well another noob in his thread tried it and it worked. What do you know?
Old 06-23-2011, 09:30 PM
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I can see what he is saying ... I think I would agree as long as it is only in the preventative maintenance category
Old 06-23-2011, 09:55 PM
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lol I like the way my coworker look at me when I tell them I'm worried that my car is not burning oil
Old 06-24-2011, 08:14 AM
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Hey 9k,
In your first post you recommend replacing the omp oil lines, with what?
Did you use the same OEM lines purchased from the dealer or did you use something else?
(admittedly I've not spent the time to read this entire thread)

I've got my OMP table cranked and my oil consumption (or lack there of) is has me ... well ... lets just say I'm keeping an eye on it. (I am heavily premixing atm)

I've been to onlinemazdaparts.com and mazmart.com and can't find the oil injectors.
Where do you get these things or are they called something else in the parts world?

Thanks .... I'm playing my lazy card today (I had one saved up)
Old 06-24-2011, 08:37 PM
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Think they are N3H114631B, someone let me know if that's not right and I'll delete this post!

Also see................... http://www.jimellismazdaparts.com/sh...&searchString=

Then I found this as well...............



Attached Thumbnails Possible New Renesis Engine Failure Theory?-oil_nozzle1.jpg   Possible New Renesis Engine Failure Theory?-oil_nozzle2.jpg  

Last edited by Mazurfer; 06-25-2011 at 08:41 AM.


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