simcom Posted May 6, 2004 Share Posted May 6, 2004 Hi, could someone tell me what exacly is this PCV valve and where it's located??? Quote Link to comment Share on other sites More sharing options...
calean007 Posted May 6, 2004 Share Posted May 6, 2004 Usually they are located on top of the engine valve cover(Block) and it has a single hose attached to it. To test if it works you can do one of two things. Detach it and shake it. If you hear a rattle, it's good. If not, well replace. they are about 2.00 and Fram makes them. You can also with the engine running take the valve out of the valve cover and put your finger underneath the PCV valve. If you feel a strong suction, it's good too. Otherwise replace. I don't know the exact location as I haven't looked under my LS 400, but I think it's going to be where I stated... Quote Link to comment Share on other sites More sharing options...
99lsguy Posted May 6, 2004 Share Posted May 6, 2004 Usually they are located on top of the engine valve cover(Block) and it has a single hose attached to it.To test if it works you can do one of two things. Detach it and shake it. If you hear a rattle, it's good. If not, well replace. they are about 2.00 and Fram makes them. You can also with the engine running take the valve out of the valve cover and put your finger underneath the PCV valve. If you feel a strong suction, it's good too. Otherwise replace. I don't know the exact location as I haven't looked under my LS 400, but I think it's going to be where I stated... correct!!! On the driver's side valve cover. Gen III is towards the front of the engine ; Gen I & II's are more in the middle to back side (on top of the valve cover). Quote Link to comment Share on other sites More sharing options...
calean007 Posted May 6, 2004 Share Posted May 6, 2004 Thanks...does this mean I'm accepted into this family? he he Quote Link to comment Share on other sites More sharing options...
simcom Posted May 7, 2004 Author Share Posted May 7, 2004 I have 90 LS. NOW I think I know where it is. Unfortunatelly I don't know how to change it. Do I have to unscrew it, pull or what?? It stucked in this rubber seal, so one is sure...I won't do this by hand...:) Please help. And if I change it, do I have to change that rubber seal?? oh, one more. What do you think about STP complete fuel system cleaner (i think this is a silver bottle), is it OK??? or maybe should I use syn power???? Quote Link to comment Share on other sites More sharing options...
VMF Posted May 7, 2004 Share Posted May 7, 2004 just pull it out, but gently not to brake the seal around it. Quote Link to comment Share on other sites More sharing options...
calean007 Posted May 7, 2004 Share Posted May 7, 2004 As far as a fuel additive, you don't need all those fancy advanced crap bottles. I goto Wal-Mart and get the house brand equivalent of regular STP and use it in both my Honda and Lexus. It works just as good. For the valve, just pull it out but be careful about and don't break it in half. It's just cheap plastic... Quote Link to comment Share on other sites More sharing options...
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