NEED HELP. Efr6258 leaking oil on compressor side
 

I've got a efr6258 on a kraken low mount. Been having oil getting into compressor side and into intercooler pipes. I've tried everything.

Currently have both vavle cover ports going to a VTA catch can (lines are -10). Oil feed is -4
oil drain is 5/8 barb going to a 45° degreee -10 fitting on the pan. I've drilled out the fitting so both sides are 1/2inch.
https://cimg2.ibsrv.net/gimg/www.mia...8e7a4a3d55.jpg

any suggestions?

I’ve got a similar issue going on with my 6758, I have a thread about it somewhere if you want to search. My motor makes 100psi cold, 30 hot at idle, 40+ anything above idle. BW says to keep it under 60psi. I’ve currently got a turbosmart oil pressure regulator that’s supposed to keep it at 40psi. didnt seem to work, but noticed the OPR’s return was similarly restricted like my turbo drain, so I enlarged it to hopefully drain back more to the pan. Time will tell, but I still think there’s an issue with the CHRA.

Yeah my oil pressure is always under 50 psi. Ive read up on your thread. It sounds like yours still isn't fixed??

Throw a pressure transducer in there (can be temporary) and monitor/log crank case pressure over all operating conditions. Make sure you use one that has a smaller dynamic range (a -15-30 psig would be my recommendation). Anything over a psi or 3 can be problematic.

Edit: you can use a hose stuck on the dipstick tube for this

Correct, although the latest round of fixing is yet to be truly tested. The OPR looked like it was designed to regulate 60psi down to 40, not 100. I may try the above suggestion, and then it's sending the turbo somewhere.

You can run a restrictor before the OPR. This does 2 things... 1) limits the flow to not overwhelm the regulator, and 2) reduces "wasted flow", the OPR is a shunt. 100psi through an an6/an4/an3 unrestricted is going to be a ton of flow.

My car is only 45-50 psi max with no OPR. Maybe I should run 2 catch cans, one to each port? Instead of 1 catch can for both ports.

the size of the hose/fittings (ID)/baffle passages are way more important than the number of catch cans. EX side going to the pre-turbo intake (no VTA) actually can pull vac on the crankcase during the period most likely to create blow-by.

https://cimg4.ibsrv.net/gimg/www.mia...c416171312.jpg

You haven't been blowing intercooler pipes off have you? When I turned up the boost on my Garrett turbo, I blew off the first 90 degree turn coupler a few times. One time I didn't immediately pull over and fix it due to the lack of tools, and I noticed oil had started to pool up in the compressor outlet. I fixed it, wiped it down, and then checked for oil later and there wasn't any there.

Just something to consider, even though your situation is very different.

Update
 

Did a compression and leak down test. Both passed perfectly. 0 leakdown.

I hooked my boost guage up to my dip stick tube and went for a drive. The guage never moved once, not even the slightest. Is it possible my drain isn't sufficient? What else can I try?

No i have not been blowing intercooler pipes off. Never have.

well, you are starting to get into potential defect area. Did you confirm that the drain wasn't blocked inside the pan by the pickup tube, or sit below the full oil level? Is your air filter restrictive enough to get negative pressure in the compressor housing while off-boost?

It's not blocked inside the pan or sit below the level. Checked those already. Air filter was new last fall and high flow.

a defective EFR that has compressor side oil problems is not unheard of. I know of 2 such cases locally.

You don't park nose down on a hill do you?

No I park on a flat level ground.

Speak more.

not much to say really... both were used on TSE kits, installed to spec, one was a 67 the other a 62. Both were passing oil out the compressor side. The 67 was immediate (first run) and was replaced via RMA with BW. The second was a latent that manifested later (6 months) and required some convincing by the local shop specializing in servicing turbos (mostly diesel) to get a new supercore gratis (I think Andrew might have stepped in on this one as well). I was not directly involved with either of the interactions with BW, but was very familiar with the builders and the cars. They were both high end and very well done.

I have also run into a wall getting my EFR6758 serviced. All the usual shops are refusing due to the lack of service parts.

The official line from Borg (and pretty much every shop I called) is that the EFR is not serviceable.

I am having a new compressor wheel installed and balanced on my backup 67, if the shops did not flat out refuse the work, they offered no guarantee that the unit would survive disassembly for balance.

Hmmm.
https://cimg4.ibsrv.net/gimg/www.mia...4e3386afe.jpeg
Hmmm. Just got this and Kraken low mount, and sure don’t want to put it on and have leaks. I’m considering about putting 40-60 psi on it and spinning it w compressor to check. Thoughts?
Obv 40-60 oil into oil port

SOLVED
 

So today I decided to do a compression test. 149 dry and 215psi with oil. My issue is definitely a result of having over 60psi increase from oil meaning my rings are not sealing. I only ever did a dry compression test and leakdown test, both showed perfect numbers... I'll need to have my new rebuilt motor rebuilt again unfortunately. I'd recommend to anyone else to also do this test.