pcruz620 Posted April 16, 2012 Share Posted April 16, 2012 Hi everyone. I'm trying to swap an l28 into my early 260z. I've read that I can pretty much take off all of the smog equipment but I just wanted to make and ask you guys if it's okay to plug up this connection from the smog pump to the block. Is that okay?...Also, does anyone know any good faq pages or pictures that can help me out in this subject? I'd really appreciate it. Thanks! Quote Link to comment Share on other sites More sharing options...
rossman Posted April 16, 2012 Share Posted April 16, 2012 if it's okay to plug up this connection from the smog pump to the block. Is that okay?... No it's not ok. That pipe is the crankcase vent. Plum it to the PCV Valve. Optionally, you could plumb the crankcase vent tube to a catch can or simply mount a small filter to it. In any case, your crankcase must breath else the pressure that builds up inside will blow out your seals. Quote Link to comment Share on other sites More sharing options...
pcruz620 Posted April 16, 2012 Author Share Posted April 16, 2012 Hey thanks Rossman. I'll definitely have more questions as my friends and I take down and rebuild my Z. I'm kinda green when it comes to this stuff and my mechanic friend is more of a Honda guy and isn't too familiar with Datsuns. Quote Link to comment Share on other sites More sharing options...
Leon Posted April 16, 2012 Share Posted April 16, 2012 All US street-legal automotive engines since about 1965 have PCV, whether it's a Honda or a Nissan doesn't matter. That crank-case vent has nothing to do with the smog pump, and should be connected to your intake manifold via PCV valve, as Ross alluded to. Download the FSM at xenons30.com and you should have most of the info you need. The rest is in the archives, so use search tools (I prefer Google) to your advantage. Quote Link to comment Share on other sites More sharing options...
Gollum Posted April 16, 2012 Share Posted April 16, 2012 (edited) A long long time ago, in a galaxy far far away.... ...there were engines with no crankcase ventilation, and they all had high clearance seals and leaked oil. There's a very good reason most engines from the 50's and earlier SHOULD leak oil, and that it's a sign of things working RIGHT. Use a PCV valve, your engine will thank you, and you'll have less fumes in your cabin as you drive down the road. Edited April 17, 2012 by Gollum Quote Link to comment Share on other sites More sharing options...
rossman Posted April 16, 2012 Share Posted April 16, 2012 You guys crack me up! Hmm, now were is that PCV valve... Quote Link to comment Share on other sites More sharing options...
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