Jump to content
HybridZ

RB26 head oil drain solution


Z24O

Recommended Posts

i'd like 2 sets of your -8 drain fittings and also the crank collars u mentioned for thr rb26.pm me details on your bank and i can wire tansfer the payment to you ASAP.by the way can u ship em to me in Malaysia?thanks

 

guys after being stiffed by dwayne (badgti) who ordered 3 sets of crank collars,oil drains and cam cover fittings and has been promising to pay ever since.....i am going to have to take a loss on the parts i paid to have made up for him

so

US$90 for the crank collars

US$35 for the head oil drains

US$70 for a pair of cam cover breathers

 

i will throw in free shipping if you order a set (4 fittings)

 

sorry to say this will be the last time i offer to source parts i have found useful, to be shipped worldwide, there's always one who spoils it for everyone....thanks badgti from Malaysia

Link to comment
Share on other sites

  • Replies 71
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

I ordered the head drain fitting (-8) from you like a while back, not sure if you remembered. I'm the one who reqeusted the fast shipping. You got the head drain in a -10? If so, let me know either by PM or email I'm interested as this will come in handy for a future build.

 

Thanks

Link to comment
Share on other sites

Hope this thread isn't contravening the forum rules,if so then anyone interested in the 'leftovers' please just PM me

for those that contacted me here are the pics you requested

and paypal is fine

cam cover fittings -10/-8

Rockercoverfittingfordashfittings.jpg

example of them on an engine

IMGP1817.jpg

head oil drain -8

Fitting3.jpg

....fitted

Fitting1.jpg

crank collar

crankcollar.jpg

Link to comment
Share on other sites

I thought the flooding was only an issue with the Rb20's and the 25's???

Why not just get a few Tomei Oil restrictors?? or is this a better method?

i think the discussion at the beginning of this thread gos through the pros and cons:wink:

Link to comment
Share on other sites

  • 4 months later...
Head drain plug now fitted to back of the head with my -8an oil return fitting ready to be welded onto my alloy sump/oil pan were do i fit it ?

 

1) Under the oil line.

 

2) Above the oil level.

 

Picture please of yours fitted.

 

Above oil level. AFAIK, you'd never want an oil drain dumping out below the pan's oil level.

Aside from which, based on what one of the expert head port shops in Japan stated (in an HZ thread, no less), this is more of an air return than an oil drain (kinda like that air vent on a gas can to make the gas pour down the spout much more quickly). I'd plumb it to the right side of the oil pan above oil level if it were mine.

 

Likewise, I have a S2 RB25 and it needs a crank collar as well, so collars are not just an RB26 thing.

Link to comment
Share on other sites

  • 1 year later...

to those who expressed an interest in the oil drains they are US$40 each plus post

quality CNC diy part,easily fitted and removed if you ever choose to sell the head stock

PM me if you want any and specify -8 or -10 (by the way both sizes have been tested on an RB26 at revs and they flowed oil almost identically)

payal is available for payment

 

Are these still available if so what is the price and when can I get some???? -10's

 

Mack McKinney

Link to comment
Share on other sites

I would not have dared to rain on the OP's parade, but now that he seems to be out of steam and this is technical (not classifieds)...

The rear drain (or vent in my opinion) is best done with a fitting made to adapt from pipe-thread to AN. I was specifically peeking around the oil drain galleys on my S2 RB25 when I had it apart to clean everything up. The 'freeze plug' sits at least 1/4"+ off the bottom of the oil galley. If you actually wanna drain oil from it, it's best off to drill and tap a hole so it sits squarely on the bottom of the oil galley. Like I said, however, with the head being slanted and the plug hole being above the bottom anyways, the chance of draining a substantial amount of oil with it is pretty low, IMHO; particularly if you aren't pulling ridiculous forward G's. Just install the head with the plug removed and visualize how high the oil level would have to be to cause it to actually drain oil; even with the forward g-force scenario.

If you look at the front of the motor, the head is slanted to the drivers side and the oil drains are on the drivers side. Likewise, the engine rotates clockwise, so the rotating assembly is going to make the air in the crankcase and oil drain galleys try to rotate clockwise as well. In other words, downward on the drivers side and upwards on the passengers side. At high rpm with the engine spinning so furiously (and with small room to spare in the crankcase) it is probably quite difficult for the air to rush up to the head to displace the large volume of oil constantly trying to drain out by passing the oil going the other way on the driver's side.

With that in mind, it makes sense that the RB needs a big air-exchange path on the passenger side of the engine to help displace the oil that is trying to drain out of the head on the driver's side.

As such, I still think you could drill and tap a hole anywhere on the passenger side and run it down to the sump; ideally above the windage tray.

If you wanna TIG a bung onto the freeze plug, I am sure summit racing has them. I don't know an equivalent year/make/model of freeze plug that would work, however.

Link to comment
Share on other sites

I would not have dared to rain on the OP's parade, but now that he seems to be out of steam and this is technical (not classifieds)...

The rear drain (or vent in my opinion) is best done with a fitting made to adapt from pipe-thread to AN. I was specifically peeking around the oil drain galleys on my S2 RB25 when I had it apart to clean everything up. The 'freeze plug' sits at least 1/4"+ off the bottom of the oil galley. If you actually wanna drain oil from it, it's best off to drill and tap a hole so it sits squarely on the bottom of the oil galley. Like I said, however, with the head being slanted and the plug hole being above the bottom anyways, the chance of draining a substantial amount of oil with it is pretty low, IMHO; particularly if you aren't pulling ridiculous forward G's. Just install the head with the plug removed and visualize how high the oil level would have to be to cause it to actually drain oil; even with the forward g-force scenario.

If you look at the front of the motor, the head is slanted to the drivers side and the oil drains are on the drivers side. Likewise, the engine rotates clockwise, so the rotating assembly is going to make the air in the crankcase and oil drain galleys try to rotate clockwise as well. In other words, downward on the drivers side and upwards on the passengers side. At high rpm with the engine spinning so furiously (and with small room to spare in the crankcase) it is probably quite difficult for the air to rush up to the head to displace the large volume of oil constantly trying to drain out by passing the oil going the other way on the driver's side.

With that in mind, it makes sense that the RB needs a big air-exchange path on the passenger side of the engine to help displace the oil that is trying to drain out of the head on the driver's side.

As such, I still think you could drill and tap a hole anywhere on the passenger side and run it down to the sump; ideally above the windage tray.

If you wanna TIG a bung onto the freeze plug, I am sure summit racing has them. I don't know an equivalent year/make/model of freeze plug that would work, however.

 

To add to what WizardBlack is saying, refer to page two of this thread: http://forums.hybridz.org/index.php/topic/72928-rb-rebuild/page__st__20

 

It explains a lot about this issue from the standpoint of someone who has a great deal of experience with these engines.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...