Jump to content
SAU Community

Recommended Posts

Originally posted by DennisRB30

If you get rid of the PCV system your engine will build up harmfull acidic gases which contaminate the oil reducing engine life.

I just got rid of my PCV and vented it straight to the Atmosphere. Is this bad? or is it only bad when you block it of completely. I'm finding alot of oil and shite in the intake. Never really known about the PCV, lol.

  • Replies 153
  • Created
  • Last Reply

Top Posters In This Topic

You can remove the PCV valve(illegal) or block it so it looks operational, but you must have a catch can to filter out the blowby gas/oil otherwise it will get sucked up into the intake/turbo/intercooler/engine.

INASNT have you blocked off the PCV valve or not?

VPW mailorder, there in epping but deliver to your door and yes they come with brackets but there kinda crappy so im making better ones also i had to go buy some hose and some fittings but that cost me like $20, and the catch can was $90 soooo its all good alot cheap than the cusco ones

i've installed my cusco oil catch can good 9-10months ago, but i am yet to fill 1/2 of the can with oil ... is this normal? everything is connected correct got it checked by my mechanic when i was servicing my car last saturday... i've heard some stories like someone losing more than 1litre of engine oil on the track and stuff... i've been to 3 track days with the catch can installed and i didn't lose that rediculous amount of oil... is anything wrong here?

nissaner, theoretical part 2: Your catch can is stuffed and doesnt work:) j/k

If you take off the oil fill cap when at idle, you will soon know if you are getting much blow by - on cars with poor (compression) rings, you will notice air escaping at a fair rate - thats if the pcv valve isnt blocked:p

Guest INASNT
Originally posted by turbomad

You can remove the PCV valve(illegal) or block it so it looks operational, but you must have a catch can to filter out the blowby gas/oil otherwise it will get sucked up into the intake/turbo/intercooler/engine.

INASNT have you blocked off the PCV valve or not?

nope, it feeds back after the the catch can

About catch cans. I bought an AVO unit 'bout a year ago. It has two inlets on the top and one outlet on the side. I use it on my RB20.

I have blocked off one of the inlets, connecting the catch-can only to the exhaust-side cover. The exhaust-side cover is connected to the intake-side cover as normal, which is the connected the inlet plenum as normal.

The catch-can outlet is connected to the pipe between the AFM and turbo as normal.

I still find that I have heaps of oil in my intake pipes. I also noticed that there is never a real build up of oil in the catch can (should there be?).

Am I expecting to much (thinking this should leave no oil in my intake)? Should I connect it up differently? I'm asking coz I feel like I've wasted my money - but you guys rekon catch-cans are ok.

if you've still got the breathers connected to the plenum, then the catch can probably won't do much. You've given the air two paths to take, and going straight into the plenum is much easier than going through the filter in the catch can. So there probably isn't much air going into the catch can, thus the lack of oil. I think if you block off the line going into the plenum things may improve. Also make sure that the catch can actually contains some filtering material. Some of them rely on the assumption that you'll have one of thos cute little k&n's attached to the outlet to do all the filtering. If this is the case with yours, then without the little filter all you are doing is running the blow-by through a can, which won't do much at all.

Thanks Belly_up,

Once again for the people in the cheap seats - you reckon I should block off the line between the plenum and the intake-side rocker cover (I'd remove the valve and replace it with a brass plug).

I should then run one line from each of the rocker covers to the two inlets on the top of the catch can. I should then assess whether the can has filter material in it, if it does, I can plumb back to the inlet piping, if it doesn't I should put a filter in it.

Does that sound like what you mean?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
    • OK, so a bunch of trim needs to come off to get to the rear shock top mounts. Once the seat is out of the way, the plastic trim needs to come off. Remove 2 clips at the top then slide the trim towards the centre of the car to clear the lower clip Next you need to be able to lift the parcel shelf, which means you need to remove the mid dark trim around the door, and then the upper light trim above the parcel shelf. The mid trim has a clip in the middle to remove first, then lift the lowest trim off the top of the mid trim (unclips). At the top there is a hidden clip on the inner side to release first by pulling inwards, then the main clip releases by pulling the top towards the front of the car. The door seal comes off with the trim, just put them aside. The the lighter upper trim, this is easy to break to top clips so take it carefully. There is a hidden clip towards the bottom and another in the middle to release first by pulling inwards. Once they are out, there are 3 clips along the rear windscreen side of the panel that are hard to get under. This is what the rear of the panel looks like to assist:
×
×
  • Create New...