Colbear96z

Like the title states I'm looking for some help.. My stock pcv hoses on my 2000 ss were in bad shape and leaking. I replaced all with 3/8 fuel hose.

Now my problem is I'm going to be using 5.3 valve covers and the pass rear does not have the nipple for the pcv. Instead of making a tee behing the pass vc , I was just going to run the hose from the driver rear, strait to the pass intake port
Like this.

Problem is when I routed my lines like this on car, and blocked off the pass rear port, it made a hissing noice like it was under a lot of pressure. Wham I shut the car off I could still hear the hissing coming from the pass rear from the block off.

I'm wanting to run the lines like this but WITHOUT a catch can. I can't seem to find any info regarding this.

Colbear96z

And I redid my pcv "housing" like this



And the pcv is inline on the hoses on the back of the pass side cover

SSellers

You have to have a fresh air intake for the system....bad crankcase gases sucked out one side (like you're doing), fresh air in on the other side. Otherwise with just suction you can get too much negative pressure in the crankcase which is what you were hearing hiss...it was actually air trying to get inside. Can be hard on seals also. Just see if you can find a small filter you can clamp to that rear passenger VC nipple, or run hose from it to a point between the throttle body and air filter (that's what green line represents in your diagram). Also when normal fuel hose gets warm enough or is under enough vacuum it can collapse so you may want to consider replacing it with true vacuum hose at some point.

Colbear96z

Thanks for the reply.. Well the thing is I'm wanting to use some 5.3 covers that do not have the pass rear nipple.

The stock ls1 covers are on it now and I have it tee'd.

I just put a lot of time painting the 5.3 covers and wanted to use them. I'm not completely understanding what you went by the green line on the diagram.

Colbear96z

The front nipple on the pass vc is hooked up to the tb like this

SSellers

Is that nipple by the oil fill hooked up in front of the butterfly or behind it?


By green line, I was talking about the one in your diagram that is drawn from the passenger side front nipple to the air intake bellows.

Colbear96z

The nipple by the oil feed tube is hooked up to the nipple on the TB I belive stock they are behing the butterfly.

So your saying you can hook that one up to the smooth bellow, the bellow connecting the maf-tb?

AmarilloWS6

iTrader: (3)

Have you ever considered an LS6 valley cover? It eliminates all of those pesky, annoying, cluttered lines than can (and will) eventually disintegrate. The LS6 valley cover cleans up all of the lines and does a better job than the LS1 PCV does on oil consumption. Here's some pics of mine. I have a catch can on mine. If you don't run a catch can on the LS6 PCV all you do is run a hose from the Valley Cover to the Intake Manifold. The first pic is a before pic with the LS1 Lines. I don't have a pic of just the valley cover on without the intake but the second to last pic shows the set-up done. Notice no crappy lines anymore!!

02BlkZ28

To use that LS6 valley cover dont you gotta grind clearance on your block??

Colbear96z

I've thought about doing the ls6 valley, just don't have the ***** to do it yet lol. I'm just trying to fix what I got for right now.

By the wall I've studied the how to on ls1how too, how hard is really?? I'm just scared to get metal shavings all in the oil

CHADsterss

Nice! My "housing" is the top end of a sparkplug boot that plugs into the coil pack, I just gutted it out and the PCV valve fit PERFECTLY. Probably won't have to worry about the heat ruining it again.

Colbear96z

Got a pic? Mines with a brass reducer and heater hose wrapped in shrink wrap

BrntWS6

iTrader: (7)

I know you said you didn't want to but a good catch can like the RX performance one is well worth it. Even with the LS6 valley you will still get blow by into the intake on a stock car. When I did my H/C I took my LS6 intake off and held it upside down....oil was dripping out.

Get the complete kit with the check valve filter (that's your fresh air) in place of the oil cap and your guaranteed not to get any oil in the intake. The RX cans have a PCV valve built into so you can remove your in-line one if you want, but you don't have to.

demonspeed

iTrader: (7)

It's easy. Just cover the engine bay with towels, stuff some paper towels in the valley, tape off a small "square" around where you'll be cutting, and then use a Dremel while simultaneously running a shop vac to pull as much dust as possible from the work area.

The parts are less than $100 from GMPartsDirect, FWIW. Info from my build thread: https://ls1tech.com/forums/17221814-post15.html

99Bluz28

iTrader: (35)

IMO, the passenger side rear 90* vent tube is only pressed into the hole on the side of the valve cover so with a pair of channel-locks or vise-grip pliers you can remove the tube from the factory LS1 valve cover and install it in the same location on the 5.3 valve cover by drilling a hole in it.

AmarilloWS6

iTrader: (3)

My Vette's an FRC so it's a 99 so I SHOULD have an LS1 block with the part you have to grind, but after taking my stock LS1 valley cover off I found out I have a genuine LS6 block without the extrusion. Early C5's have/had an issue where the starter would rip itself off the block. The first owner of my Vette had that happen and the dealership put an LS6 block in (must have happened shortly after 2000) under warranty. I've put this valley cover in friends LS1's though with the extrusion and it took a few minutes honestly. Very easy mod. My C5 now has very little blow by, and what little does blow by gets caught in my catch can. My intakes dry!

LS6427

iTrader: (2)

If you change your oil every 3,000 miles.....a PCV system is completely useless and not needed. I ran my 427ci for like 4 years without anything at all. EVERYTHING capped off except for two small breathers....one on the LS6 valley cover port and one at the back of the drivers side valve cover. It was perfect.

No oil entering the intake.....just clean air. Oil was always perfectly clean, with ZERO moisture......at every oil change.

PCV systems are not needed.

.