Brettus

iTrader: (2)

Yup - very bad idea to run all three to the catch can .

04 Green : Why did you do that ?

Mazurfer

Well.....he said "to prevent a bad check valve from filling the intake with oil", not that I subscribe to this particular line of reasoning.

Hell, I don't even know if there is a check valve in any of those lines......I've never researched it.

Brettus

iTrader: (2)

Well - there are check valves on the omp injectors so ...

But both the jet air and OMP lines suck air into the engine (which needs to be metered ) so effectively 2 vac leaks .

04Green

iTrader: (1)

The reason was a couple of threads that looked like bad check valves filling intake with oil. If the valve on the block other than the injectors goes bad, it will pump in oil. I do think the injector valves would cause a problem. Too little oil coming that up that path. Right now, it is plumbed to the intake, I need a few feet of tube and it will be hooked back up.

Also, I had no idea that much air was going that direction. It was really a surprise.

Grimm0ne

iTrader: (3)

this and well finding oil in my air filter box (what a pitta to clean) as the dealer i got it from over filled the oil....

so i got a weapon r tank, and will in stall it, as this post helped me deside to get one. I didn't have one on the 4g63t but the 8, i got some bling now lol.. (untill i get it powered coated nordic green)

thanks.

John Illingworth

I now I am going to sound like a nubb. But you said that 06 and newer was re routed to fix this issue but would it still be worth installing a catch can on an 06 or newer or would it have no benefit?

Mazurfer

My understanding is that there would be no benefit. Your hose from the filler neck should not run over to the intake.

RJayX-8

Just putting in my 2 cents, i work as a Tech at a Mazda dealer and we had a few 8's come thru the shop with oil in the intake and filter, and after a 1-2hrs of diag. we found that the front rotor had a bad apex seal (not completely blown) that was allowing oil to back feed up thru the intake. don't see it to often but it can be a possibility and depending on the weather your not going to notice any performance changes until the outside temp starts to rise, majority of the motors we do on 8's happen around the time the weather starts to break.

Z0oMzo0m

iTrader: (4)

Read through, didnt see it on this thread, but on another one. i have an 07, and my oil line on the filler neck goes to the 2 nipples on the lower intake manifold. (it has a white line on the hose) On my mazdaspeed intake, it has all black line, blue line and i think yellow.

Oil going to my SSV from oil filler neck = bad doesnt it?

https://www.rx8club.com/showthread.p...ld+vacuum+hose

nvm i found another link that gives more in detail.

van

iTrader: (2)

With the 06+ they've relocated it further down into the maintenance ports. The problem is still there, just won't be as noticeable. A catch can is still definitely a benefit.

Rx8Les

iTrader: (3)

Great DIY... This doesnt have to do with the Oil catch can, but what is this that i pointed on the picture???

scolon

iTrader: (2)

I believe that's the Racing Beat water temp. sensor.

Edit: link

comebackqid

iTrader: (13)

thanks for the DIY op.
My cousin and I just clean the SSV valve, put on a SOHN adapter, and mounted 2 oil catch can one for blow back, one pre mix. good stuff. now time to put in my AFE SS. and have some fun.

Jake33

iTrader: (2)

quick question. does it matter if the top of the can (where the 2 nipples are) is angled down? or do the nipples have to be at an pright posistion to allow proper flow from the oil filler neck? (the hose running from the neck to the can is sloped downwards)

van

iTrader: (2)

^ post a pic. It depends on how much of an angle. Ideally though, you'll want it it to be in an upright position as not to impede flow.

Jake33

iTrader: (2)

windsheild cap is reference for the angle since its level. im really not sure where else to put this thing, its 750ml. might just sell it if i cant find a safe/secure spot.

van

iTrader: (2)

^ Is the can going to be mounted upside down like that?

Jake33

iTrader: (2)

Thats the way I was going to mount it...doesnt seem like.it would work though

Z0oMzo0m

iTrader: (4)

Not going to work if upside down, lol might as well not use it.

Jake33

iTrader: (2)

**** i have no idea of where else to mount this damn thing!

van

iTrader: (2)

^ mounting it upside down defeats the purpose of a catch can. You want the oil to drain from the top of the can to the bottom. The way you have it in the pic, oil will blow right out the breathing hole lol. There is enough room to mount it by the brake master cylinder, BUT you would have to fabricate a mounting bracket.

If you don't want any mounting issues, I'd just get the Weapon-R catch can. It's custom made to fit the RX8, and mounts right in front of the windshield washer fluid bottle.

Jake33

iTrader: (2)

thanks van, ill have to sell mine and grab one of those

GK1707

iTrader: (10)

EDIT: found it... delete post

ShellDude

iTrader: (12)

was gonna say, search n00b btw you can delete your own posts.

posted just this morning: https://www.rx8club.com/series-i-trouble-shooting-95/air-filter-throttle-body-vaccum-connector-232573/

quicksilver34

iTrader: (10)

man i kinda read the post. look at pics. did anyone put oil catch on 2006. if so show me the direction.