my89xj

for a renix, there's the pcv on the front of the valve cover that releases pressure, can I just put a mini air filter there?

DFlintstone

For the engine you just need it to vent freely and not let crud in. Running it into the air cleaner as designed normally works fine. Being that the life layer on earth is relatively the thickness of the wax on a bowling ball, I'd have it right unless it was fouling up the filter. In the link in my signature Crusier has a mod for the Renix to help that.

my89xj

I use my phone can you send me the link I'm pm you my email.

DFlintstone

I sent them all. In open office format the valve cover mod is in smaller print. It's nearer the bottom. How many miles you talking about on that? You over 200K?

my89xj

Just got it, wow lots of good info, thanks. 89xj 259k

DFlintstone

Cool, some great stuff there. Cruiser worked at Jeep during those years. Anyway, I could have over simplified there^^. Somebody suggested that the position of the CCV outlet in the Air Cleaner might sometimes provide some vacuum for it. Idk about that. With the air inlet on the front, and being up-stream of the filter I don't know if there it much vacuum there or not. For sure you don't want it backed up. One guy was blowing his dipstick out!

Now they call the Positive Crankcase Ventilation system, (PCV), CCV for some reason. Closed crank..vent...Anyway the metered orifice and the tube to the back from the intake should be free. That "vacuum leak" is planed for. Good luck!

my89xj

So basically as long as pressure is relieved, it's ok?

DFlintstone

As far as the engine is concerned, yea, pretty much. It needs crankcase circulation to remove moisture, then there are vapors from gas and oil as well as some combustion gasses that "blow by" the rings. The CCV sucking guarantees there will be circulation weather there is blow by or not. I suppose with no blow-by at all air would actually go IN that front one, circulate, then go out the back, to then be burnt in the engine. Being routed into the air cleaner/intake would be one idem on a smog checklist.

As the engine wears the blow by can go up. Cruisers valve cover mod, (I'm betting), improves the way it exits the valve cover so it's less likely to draw oil along with it. Anyway, I don't want to breathe it, don't want your kids to breathe it, so running it in the intake is a good place for it. Hydrocarbons are pretty bad smog. I remember as I kid the clamping in my chest trying to breath it, stinging watery eyes, "smaze", a smoggy haze. This smog junk has made a big difference and helped ALLOT.

Anyway yea, it needs to releave any pressure. The front and rear seals, as well as the distributor and the dipstick are places it will try to escape otherwise. Then any leaks in the valve cover, pan, timing cover ect would be allot worse.

my89xj

Ok then my current set-up works then, your really helpful man, thanks again.

DFlintstone

Cool!, Thanks.