I'm sorry for the silly question, but I've searched here and on the net trying to figure this out for several days, but to no avail..

Anyhow, I have an IHI RBH5 turbo off a Ford Probe, and my question is, which of the four inlets on the turbo are which?

I know that there's an oil and coolant feed & return, but I don't know which is which- on me.

Again, sorry for the silly question, but I'm pretty new to turbocharging, and I'm just trying to learn as much as I can about it before I boost. Thanks in advance

 

it should be obvious which is which.

post a pic , I can show you...

 

Sorry, I don't have a camera, or else I would post a pic.

I believe that I know which is the oil feed, which is on top and has what looks like a 1/8th NPT fitting on it. (Right beside where the compressor would feed into the charge pipe to the IC)..

At the very bottom on the opposite side of the turbo (the side the wastegate actuator is one) is a larger fitting, I'd assume that's the oil return, right?

Then what I would assume is that the water (well coolant) feed would be the other upper fitting, and the coolant return would be the lower fitting, also on the wastegate actuator side, right?

I know this is a terribly simpleton question , but I don't want to think I know; I want to know I know, because it would be really stupid to screw up something so mundane..
I appreciate your help.

Edit- tried to clarify my post


Modified by UncivilCivic at 1:57 AM 11/1/2003

 

i know how that is, im still not 100% certain of the coolant lines on my 14b (not installed yet). if it helps any, try to smell the holes to see if they smell like oil or coolant..?

 

There will be a feed line hole which will be the smallest hole in diameter. Directly across (180 degrees around) will be the turbos oil DRAIN hole. The threaded holes will be for coolant.

Brad

 

OK, that helps some; the smallest hole is on "top", opposite side of the wastegate. It's threaded (and currently has a 1/8th ID barb on it, presumably from the previous owners' oil feed line. Most pics I've seen of other turbo setups have a braided steel line going here, which I assume is the feed line.

None of the others are threaded though (at least not anymore- I can't say of course what the story was when new), but it would be safe to assume that the largest hole, opposite of the one with the one with the barb on it on the very bottom of the turbo, is the oil return. That sound about right?

Then, the other two are for coolant, and these I would think would run top to bottom too, right? The coolant feed is the upper one, and the coolant return the bottom?

Damn I wish I had a camera....


Modified by UncivilCivic at 3:00 AM 11/1/2003

Edit- OK, check out the link below to homemadeturbo:

http://www.homemadeturbo.com/turbo_projects/d15b2/

In that second picture down, the hole just above the wastegate actuator is the coolant return?
Then right above that is the coolant feed?

Then on the other side of the turbo, the other hole visible in the pic is the oil feed?

And the last hole, the only one not visible from the pic is the oil return?




Modified by UncivilCivic at 3:07 AM 11/1/2003

 

as far as the coolant is concerned it doesn't matter between feed and drain...just hook up the coolant lines...there is not a specific feed/drain on them. oil feed will be the smallest and directly opposite side will be oil drain and will be larger diameter. if the center section is not set right for the feed to be on top and drain on bottom you will have to clock the center section to the appropriate orientation.

 

OK, that helps a bunch. I think I've got it pretty straight now.

Thank you very much for the help everyone!!