bodywerx Posted October 20, 2008 Share Posted October 20, 2008 Hi guys, I just got a "new to me" 71 240Z from my father-in-law. It had an engine swap about 2 years ago to a 2.8L 280z triple weber carb setup. I was looking over things on the weekend and noticed a few things, that he did not. On the drivers side under the 1st weber there is a hose coming off the block, looks like a "L" shape, going nowhere. It is not effecting the car in any way that I know of..... Any suggestions on what it is? I will try and take pics if this is not clear? Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted October 20, 2008 Share Posted October 20, 2008 Crank case vent. Usually connected via a hose to a valve in the intake manifold. Quote Link to comment Share on other sites More sharing options...
bodywerx Posted October 20, 2008 Author Share Posted October 20, 2008 Crank case vent. Usually connected via a hose to a valve in the intake manifold. so hanging down against the header is bad then right? Quote Link to comment Share on other sites More sharing options...
Jaspendlove Posted October 20, 2008 Share Posted October 20, 2008 welcome!!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Valmont Posted October 20, 2008 Share Posted October 20, 2008 yes and no - all it means is that trapped exhaust gasses aren't going from the head, and back into the intake to get recycled. Alot of people just cap is off on the intake side, and put a filter on the valve cover side, like on this pic i stole from qwik240z. Quote Link to comment Share on other sites More sharing options...
JSM Posted October 20, 2008 Share Posted October 20, 2008 so hanging down against the header is bad then right? Welcome! If it is hose touching the header yes that is bad. Do not plug that hose in anyway. Put an air filter on it or preferably hook it back up to the intake as intended. Quote Link to comment Share on other sites More sharing options...
bodywerx Posted October 21, 2008 Author Share Posted October 21, 2008 I have a vent on the valve cover. I will look to see if I can hook up the vent to the intake somewhere, again, it is a 280 engine with a triple weber. This is all new to me, thanks. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted October 23, 2008 Share Posted October 23, 2008 Welcome (for the 3rd time)! Some folks (in racing applications) run that hose off the block to a catch can that is vented. Some folks run the top valve cover hose to another catch can as well. It is best to have the PCV valve hooked up to the hose on the block to create a scavenging vacuum on the hydrocarbon gases in the block, however, as stated before, just a breather is fine. Especially since the triples don't have a PCV valve. Quote Link to comment Share on other sites More sharing options...
Guest Asta-Rolf's Sis Posted October 23, 2008 Share Posted October 23, 2008 Ours is also a '71 240z with a 260z engine. Very interested in your progress, so listening. Ours is for sale, but we're on the fence about it. This thread has taught us some stuff, so thanks, and sorry for intruding. Found you through 1971 Datsun 240z queries. We're trying to figure things out as well, and happy we can tune in to your progress. http://www.dropshots.com/astaccs So much to learn. Quote Link to comment Share on other sites More sharing options...
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