I blew off an intercooler hose last night and found tons of oil inside of the pipes, pulled off the IC and dumped a puddle of oil out of it. It seemed to make its way all the way up to the throttle body there was so much. Oil all over the IAT and it even seemed like oil was being blown off.

I talked to a friend with a begi S kit with a 2560, and he mentioned that he had oil in his pipes as well.

Is it possible the oil restrictor is not restricting enough?

Suggestions?

 

Make sure there is no restriction in the oil drain. It's gravity fed only...You are not allowed to level the drain or worse , go upwards..
The valve cover breather hose is going through the inlet off the turbo??
If so, put a air filter on it and plug the hole on the turbo inlet.

Is the compressor side off the turbo dirty? (only when above is not the case)
Then it might be an oil pressure problem like you mentioned.

 

The drain is smooth with no kinks and always goes downhill. I can see how that would affect it though. And no the breather hose doesn't go to the inlet anymore, I disconnected it and plugged in port on inlet pipe.

I don't think the compressor side is dirty, but Ill take a look. Pretty much everything below it was covered in oil though since I drove a little while to get home and fix the hose.

 

The cam cover breather hose does NOT go to the Compressor intlet tube?
Stephanie

 

Correct. He removed it so the turbo wouldn't suck oil in from the cam area. Same thing with his friend's S kit with 2560 when it was installed.

 

So both Compy and his friend have removed their cam breather hoses and they both have oil in their intercoolers. Clearly, it's not coming from an excess of oil vapor within the crankcase.

On the other hand, by removing the breather connection to the manifold (vacuum side) of the intake haven't they allowed the pressure within the crankcase to increase to at least ambient air pressure (AAP)? And wouldn't manifold vacuum normally reduce nominal crankcase pressure in a healthy engine with little ring blowby to something below AAP?

So, it is possible that with higher than normal pressure within the crankcase the normal flow of oil from the turbo center housing isn't everything is should be and that the excess oil is leaking into the inlet side of the turbo?

 

According to BEGi S3 instructions the hose does go to the inlet tube. See the instruction excerpt below:

Cam Cover Breather:
The parts needed are located in the Compressor Inlet Tube parts bag. The
original breather hose will provide a perfect segment to go from the cam
cover to the right side of the Compressor Inlet tube. The segment must
include the 90o. Screw the 1/8NPT street elbow into the threaded bung
on the Compressor Inlet Tube. Point the open end towards the firewall.
Screw the 1/8NPT X 3/8 Hose barb into the brass elbow. Line the cam
cover breather hose with the fitting off of the cam cover and the hose
barb. Cut the hose as needed. Slide the 5/16 hose clamps onto each end
of the hose. Push the hose onto both barbs. The street elbow / hose barb
end may require some adjustment so there is not any sharp bends or kinks
in the hose. Once the hose is lined up well and free from any
constrictions, tighten the hose clamps Refer to figure # 71.

 

That's partially my point. And while one of the primary reasons breathers are plumbed that way in a stock car is to reduce emissions, it might have an additional positive effect on assisting the oil to leave the turbo center housing.

This is, unfortunately, 100% speculation on my part, but perhaps it's worth chewing over a bit just in case their might be a tiny smidgen of truth in it.

 

It would be nice, however the turbo still spit oil before and after the hose was pulled. I know this because I didn't remove the breather hose until I blew an IC pipe. Everything became covered with oil. I then cleaned it all up and reattached the pipe, and after seeing all the oil, pulled the hose. Then another unfortunate stroke of luck, same hose blew again (something is wrong with the clamp), and everything got covered with oil once again.

Sorry to not clarify that until now.

 

Wow you are really reaching here. Interestingly enough, while Compy's car doesn't have a real oil pressure gauge the friend's car does and his oil pressure readings are not above normal and certainly not enough to overflow the turbo line.

I run both my turbo Miatas with no line from the valve cover to the turbo intake and guess what. Not a drop of oil comes out of my turbo into the intercooler piping.

Additionally, vacuum from the manifold when not in boost is still provided to the top of the head via the PCV valve.

 

Hm, your 2560, the one I and my friend have that has oil issues, did not come from begi right? Only the 2554?

 

does the oil come from the breather line or the turbo....figure that one out first.

 

Reaching is one of my specialalities.

And I'll be damned, there are two vacuum lines from the breather to the intake tract.

Hey, it was a shot and probably something much simpler and more conventional is the cause, like a failed oil seal in the center housing.

 

It is normal to have some oil in the intercooler tubes. In fact, it is a good thing. It will coat the inside of the metal tube and help prevent rust.
Stephanie

 

Turbo.

 

Ill assume that is sarcasm. I use silicone pipes. It would be funny if it was some oil and not pouring out of the IC and reducing the octane of my gas by filling the intake with oil.

 

No sarcasm, I just did not read your entire signature. I saw the S3 and tuned out... Sorry.
Stephanie

 

we don't take well to sarcasm here.

 

I know, I am so ashamed.....
Stephanie