proxlamus© Posted May 6, 2007 Share Posted May 6, 2007 Well.. I have been having really bad problems with my Holset HY35W blowing oil out of the turbine oil seal.. First I checked my crankcase pressure and there was so much pressure, the oil was not draining out of the turbo, so it backed up and went out into the turbo. Typical signs include burning blue smoke once the car is warmed up and the exhuast is burning the oil. FIRST thing to check is the PCV setup. I added one with some good results, just not perfect. Rather than spending $15 from ATPturbo or another company and finding the right thread pitch and length and size of the oil inlet, I said screw it and fab up my own. I used the stock banjo bolt that came on the 280ZX turbo's and I am still using the stock oil lines. (12mmx1.5 pitch BTW in BNPT (yes british)) I went ahead and cleaned, wire brushed and de-greased the banjo bolt. I then welded up the opening. I took a 1/16 (.060) drill bit and drilled through the weld. Tada, my own oil inlet restrictor. I can increase or decrease the size if I choose. (yeh it looks ugly but hell it works) Now I called Garret and they recommended an inlet size of .035 for their ball bearing turbos. ATPturbo sells a inlet restrictor of .060. Depending on the turbo the size of the inlet will differ. Remember too small, you'll run the turbo dry on oil and damage the seal from oil starvation. Too big you'll blow the seals out from excess pressure. DO YOUR HOMEWORK! Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted May 6, 2007 Share Posted May 6, 2007 Good thinking. DIY - the way I live my life. Did it fix your smoking habit? Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 6, 2007 Author Share Posted May 6, 2007 Ill be finding out tomarrow, its too dark out tonight to drive it around and look for smoke. But im willing to bet it will fix the problem. Alot of DSM and Honda tech forums have alot of info on using a restrictor with the Holset turbos. So I think this is the best route. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 7, 2007 Author Share Posted May 7, 2007 damn! still smokes.. must be an engine problem. I guess I should pull the turbo and see if the engine smokes then without the turbo Quote Link to comment Share on other sites More sharing options...
Z24O Posted May 7, 2007 Share Posted May 7, 2007 i had a similar problem with my T3 on RB30ET(all factory),no problems until i doubled the boost then smoke +++ on heavy acceleration turned out i needed a much bigger breather in the rocker cover and getting rid of the PCV valve which was too restrictive,ran a 1/2 pipe into a catch can....voila you could test the theory easily by leaving off the filler on the rocker cover,taping a thick rag over the top(to stop oil blowing everywhere)and going for a quick run Quote Link to comment Share on other sites More sharing options...
510six Posted May 8, 2007 Share Posted May 8, 2007 http://www.turbophile.com/technical/diy_catch_can.html It really sounds like you need a air/oil seperator. Mine is very similar to the one pictured with the exception of having my vent run to the fenderwell and using two 5/8 lines.One from the valve cover and the other directly from the stock crankcase ventilation line.This will allow any blowby to be sent to the catch can and then returned to the oil pan. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 10, 2007 Author Share Posted May 10, 2007 Than you 510six.. on the 2 fittings, do I hook one up to the intake manifold?! Quote Link to comment Share on other sites More sharing options...
GrayZee Posted May 11, 2007 Share Posted May 11, 2007 But im willing to bet it will fix the problem. Alot of DSM and Honda tech forums have alot of info on using a restrictor with the Holset turbos. So I think this is the best route. I am curious if anyone else running a Holset has experienced problems? I know Honda's typically use restrictors but then those Vtec engines run extremely high oil pressures. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 11, 2007 Author Share Posted May 11, 2007 Well I am running the STOCK oil lines.. I noticed almost everyone on this board has ran stainless braided lines... hurmm Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted May 11, 2007 Share Posted May 11, 2007 I run stock turbo oil lines too. No restrictor. Mine only burns oil through the valve guides and a tiny bit past the rings. Normal wear. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted March 20, 2008 Author Share Posted March 20, 2008 I should probably update this thread... a properly setup PCV system fixed my smoke problem =) Quote Link to comment Share on other sites More sharing options...
Guest grigsz Posted March 21, 2008 Share Posted March 21, 2008 I should probably update this thread... a properly setup PCV system fixed my smoke problem =) What kind of PCV setup did you do ? Greg Quote Link to comment Share on other sites More sharing options...
Six_Shooter Posted March 21, 2008 Share Posted March 21, 2008 In a car I did an engine swap and turbo build on, I did something similar, but was replaceable/removable. The fitting was not a banjo bolt, but could be adapted. I used an AN to NPT fitting in the turbo itself. I ran a tap into the opening from the "top" (AN end), I don't recall the actual size or thread at this point. Used a bolt and cut it off at about 3/8" long, so that I ended up with essentially a grub screw (Didn't have any handy, so used what was on hand), drilled a small hole .045" or so, again, it's been a while. Cut a groove accross the end, to use with a flat tip screwdriver. Added some lock tight to the threads, screwed in, and voila, removable, or replacable restrictor. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 21, 2008 Share Posted March 21, 2008 What kind of PCV setup did you do ? Yeah, let us know what you ended up doing. It seems to me you just need to make the crankcase vent large enough depending on your engine's amount of blowby. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted March 21, 2008 Author Share Posted March 21, 2008 I just took a 3/8" hose i believe.. and ran it from the crank case breather to a TEE fitting on the intake manifold. (brake booster line was tee'd off) I cut the hose in half in one section to "splice" in the stock PCV valve. Crank breather |==========| PCV valve |==========| Intake manifold = hose | worm gear clamp Works great Quote Link to comment Share on other sites More sharing options...
ktm Posted March 21, 2008 Share Posted March 21, 2008 I did the same thing 6 months ago. I ran a hose from the PCV tube to a push-lock fitting that was -6. I then have a -6 to 1/4-BSPT adapter that is on the bottom of my N42 manifold. I cut the hose and inserted a PCV. Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted May 1, 2008 Share Posted May 1, 2008 I was having issues with oil being pushed through the seals and into the exhaust. I hooked up the PCV valve like this: Crankcase vent ========PCV valve in intake manifold and added the diy weld and drill oil restrictor you described in the first post in this thread. (and broke 4 bits in the process). It stopped the oil from going through the turbo seals, but now its coming through the banjo bolt. ie. pressure is too high before the banjo bolt. I'm using old copper washers so I'm going to try changing them first but if that doesn't work I guess I'll have to add a second resistor before the banjo. Also, what is an appropriate oil pressure? How high is too high? The upper limit I see for oil pressure is approximately 75-80 psi Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted May 6, 2008 Author Share Posted May 6, 2008 crankcase vent ==== PCV valve in intake manifold should be stock =) Quote Link to comment Share on other sites More sharing options...
rossman Posted May 6, 2008 Share Posted May 6, 2008 Doesn't this mean that you are pressurizing/boosting your crankcase? Is your valve cover breather also connected to your intake? Seems like the pressurized manifold would force air past the PCV valve into the crankcase. I must be missing something. Quote Link to comment Share on other sites More sharing options...
TrumpetRhapsody Posted May 6, 2008 Share Posted May 6, 2008 Pretty sure that's the point of the PCV, to not let pressure back... could be wrong though. Quote Link to comment Share on other sites More sharing options...
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