JustAFooL

iTrader: (45)

Going back together with my new 243 heads and didn't label a few things properly. Although the air ad e g r are deleted, I can't figure out a few things. There are 2hoses on top of the valve cover I'm lost on and also the clip on the back of the LS6 intake. Anyone know where a good hope diagram can be found or answer my questions? Google was no help..

03Sssnake

iTrader: (20)

Here is a decent one from LS1 How-to. You will also have a big vacuum line at the back.

JustAFooL

iTrader: (45)

I can't figure out the crossover hose.. Do I need to pull the factory "nipple" off the stock head and put it on the new head then just run a connecting hope between the 2 value covers??

JustAFooL

iTrader: (45)

Big vacuum line at back is one that connects to brake booster, correct??

03Sssnake

iTrader: (20)

yes, brake booster at the back of the manifold. Are you referring to the nipple off the valve covers?

JustAFooL

iTrader: (45)

Yes, my new 243 covers didn't have one and it broke when I was trying to get it out of the old ones. The new value cover looked like it was blocked off anyways where that nipple would go.. doesn't make sense. This is literally the last thing I have to do before I can try to start car!

03Sssnake

iTrader: (20)

Those 243 were probably off an LS6. They eliminated the crossover on that motor and ran only vent tube from passenger side valve cover for fresh air and valley pcv setup to intake mani.

03Sssnake

iTrader: (20)

You can probably find a fitting at the auto parts store and 3/8s vacuum hose and setup your own crossover.

JustAFooL

iTrader: (45)

So what are you saying I need to do?? If the valve covers blocked, I don't understand why I should worry about running it.. thanks for the help by the way..

03Sssnake

iTrader: (20)

You still need to pull/vent the gasses out of the crank case. This was done via the valley cover on the LS6. You don't have the valley cover setup to do that. What year is your car? Were your old valve covers center bolt or perimeter? Will your old valves covers fit? They should if they are center bolt.

JustAFooL

iTrader: (45)

Car is a 98, had perimeter covers. Everything else is the same. Would it work to fit a grommet on the driver side value cover and connect the hose like that to the passenger side valve cover?

03Sssnake

iTrader: (20)

You could put a grommet on the driverside VC. The passenger side has no boss or provision for a grommet, so you will have to tap it and screw in a nipple fitting.

03Sssnake

iTrader: (20)

passenger side vc on my 99

JustAFooL

iTrader: (45)

Looks identical, just run a 3/8 hose to other side and call it a day??

03Sssnake

iTrader: (20)

Yep and T fitting to connect the two sides, so you can run another hose to the fitting the intake manifold (just behind the TB). You need vacuum from the mani...

03Sssnake

iTrader: (20)

Not the best photo, but that vacuum hose running to the front of the intake needs to be connected to the T fitting connect your two valve covers.

JustAFooL

iTrader: (45)

Got ya, t fitting to connect rear nipple valve cover to intake and driver side value cover.. the front nipple on the passenger side connects to throttle body

03Sssnake

iTrader: (20)

yep,

JustAFooL

iTrader: (45)

You saved the day bro .. now I'll know if she goes or blows. If you were around east TN, I'd buy ya 6

03Sssnake

iTrader: (20)

appreciate sentiment, have yourself a sixer when she fires up and consider it even!