JayzVr 106 Posted March 20, 2015 Report Share Posted March 20, 2015 Was fitting my new air filter when I stumbled across this.Loads of gunk in the intake pipe which has come from the pcv valve if that's normal, then I found a mesh/spring in the breather pipe which connects to the pcv valve.What's it for and is it needed and can the pcv be removed. Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Pcv valve can be removed but it's advised to run your breather pipe to a catch can, or straight out to atmosphere with a piece of long pipe down to the chassis rail.That mesh in the pcv valve is intended as a flame trap to stop any unwanted hot oil firing in the inlet tract. Personally I don't really think such a problem is too likely but that's what it's for. It also does a good job of stopping too much oil splatter into the inlet. Mines long gone and at present I've got a piece of samco carrying the crankcase fumes down to the road but a catch tank or fresh clean pcv is by far the better idea. Gwr corrado, bennyk, daveyboy and 2 others 5 Link to post Share on other sites
bennyk 1,238 Posted March 21, 2015 Report Share Posted March 21, 2015 That's interesting, been trying to figure out what to do with mine when I get the charger on there and not to keen on catch cans, are there any problems with just running a bit of pipe off of it? Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 No problems, it's only there to recirculate crank case pressure or blowby as the yanks call it. It's just what down draft the piston rings cause and any compression passing rings in a poor engine. You may find you get oily wishbone because there will always be certain amounts of oil "spit" from the breathers. Hence the oil in the ops inlet tract. bennyk 1 Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 Thanks for the info mate I might just vent it to atmosphere.Cheers Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Catch cans are effectively a means of venting to atmosphere, depending how they're piped up. It just means the oil spit that passes through the breathers is collected instead of making a mess anywhere. Just need to empty them out on service.Some people run a pipe from the rocker cover to a catch tank, then just stick one of those little mini k&n filters on the outlet, others run the outlet back to the inlet tract. The theory being, that the oil is collected in the tank, and only vapor is passed back to the throttle body. Venting to atmosphere does ensure the inlet tract stays dry and oil free. This isn't always possible with modern engines nowadays because the pcv valve is somehow vacuum controlled and monitored through the ecu. There is a lad I work with had one fail on a mk5 gti and it gave him an erratic idle.Here's how mines routed for the time being, my engine bay is In a state of neglect at the minute so don't judge me lol... MJ Vr6, Bealieboy and D11PS 3 Link to post Share on other sites
Bealieboy 1,625 Posted March 21, 2015 Report Share Posted March 21, 2015 And for this mod, you'll require a squeezy washing up bottle, some double sided sticky tape and some toilet roll holders! Useful info big j! JayzVr and redvr6_girl 2 Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Here's one I made earlier Bealieboy 1 Link to post Share on other sites
daveyboy 897 Posted March 21, 2015 Report Share Posted March 21, 2015 Trust sqealieboy to come out with some blue Peter shit Bealieboy 1 Link to post Share on other sites
daveyboy 897 Posted March 21, 2015 Report Share Posted March 21, 2015 I've got a catch can on mine with the same idea as J running a silicone pipe along the chassis leg with a mini K&N on the end to vent the fumes. I just hand the filter on the rocker but you could smell the oil inside the car when you were stood in traffic Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 In the first pic Big J you have the pipe running down and the pipe blanked off, what did you do with the little sensor? Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Unplugged and hanging in the wind lol, I was wondering where the fcuk that came from it was that long ago daveyboy 1 Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 Unplugged and hanging in the wind lol, I was wondering where the fcuk that came from it was that long ago Lol I might just remove mine and put a resistor in it and cable tie it out the way Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Being quite honest I haven't got a clue what the plugs for but mines always run a treat without it, no faults etc. when my fuel pump works that is Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 Being quite honest I haven't got a clue what the plugs for but mines always run a treat without it, no faults etc. when my fuel pump works that isMine ran better last night, I was fitting my new air filter and unplugged it and it ran smooth as any thing, plug it back in then it runs lumpy? Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Leave it out and vent the breathers in that case. New PCV stuff is crazy money for what it is hence why mines te way it is Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 Leave it out and vent the breathers in that case. New PCV stuff is crazy money for what it is hence why mines te way it isI'll unplug it later, might remove it all next weekend as I want to remove the carbon canister as well, do you know where the clear pipe goes? Link to post Share on other sites
Big J 283 Posted March 21, 2015 Report Share Posted March 21, 2015 Down the inner Wing to atmosphere. Nothing's connected to anything under my bonnet but seriously just tuck it away somewhere Bealieboy 1 Link to post Share on other sites
JayzVr 106 Posted March 21, 2015 Author Report Share Posted March 21, 2015 Down the inner Wing to atmosphere. Nothing's connected to anything under my bonnet but seriously just tuck it away somewhere Sounds good to me I want to hide as much as possible as I plan on doing a wire tuck and shaved engine bay in the near future daveyboy and Bealieboy 2 Link to post Share on other sites
CALICO 130 Posted March 23, 2015 Report Share Posted March 23, 2015 I don't think that wire fits to anything I believe the sensor is blank (if its the same one I think your on about) bennyk 1 Link to post Share on other sites
bennyk 1,238 Posted March 23, 2015 Report Share Posted March 23, 2015 Yeah got a sensor on mine that plugs into a blank on the breather hose. Bealieboy 1 Link to post Share on other sites
Bealieboy 1,625 Posted March 23, 2015 Report Share Posted March 23, 2015 (edited) Yep, I confirm that also, I unplugged and cleaned it yesterday and then realised it was a blank. It's something to do with the U.s emissions bs which isn't required in Europe. Edited March 23, 2015 by Bealieboy Link to post Share on other sites
bennyk 1,238 Posted March 23, 2015 Report Share Posted March 23, 2015 Yep, I confirm that also, I unplugged and cleaned it yesterday and then realised it was a blank. It's something to do with the U.s emissions bs which isn't required in Europe. Did that cure the misfire?! CALICO and Bealieboy 2 Link to post Share on other sites
Bealieboy 1,625 Posted March 23, 2015 Report Share Posted March 23, 2015 It ran a bit smoother after!? Big J and bennyk 2 Link to post Share on other sites
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