Yea yea I know, another manifold thread on the manifold swap, but i need some help.Im going to be doing the swap soon, just gotta wait for some things to come in and get the fontana flange still. Im gona be using a 2.3 lo manifold and my 58mm 2.4 tb.
Like most 2.3 manifolds Ive seen, mine has 2 small nipples on the front along with the sensor thats not needed. The first nipple is for the fpr, but what is the other one for? Ive seen pics and it goes behind the manifold, but where does it plug? And for the larger nipple on the back of the manifold, do I connect a breather to that or run it to the welded on fitting on my intake?
I think I need different size vaccum line, but wheres a good place to get longer lengths of it? Most part stores around me only have short sizes of fuel line.
Sorry for the dumb questions. I know this has been covered 6930586979404967 times but I see all different looking setups and some manifolds are different than others. Plus the ny-jbodies article isnt still up and the quad4 forum article still left me with questions.
Ok I think the other nipple is for the map right?
Just make sure all of the lines that u take off are connected to either the manifold or the tb, and put some caps on the extra holes or plug em. What i did was i ran all the vac lines to the throttle body and i plugged the map in to the back of the manifold. It got rid of all the lines in front of the mani and it really cleaned things up.
Here are some pics....
http://www.j-body.org/forums/read.php?f=46&i=282740&t=282740#282740
i am going to cut the nipples on the front of the mani when i go to paint....
first one on the left is the fpr..next one over is the MAP sensor...theres one on the back for the crank case vent on the quad..if your engine is 2.4 just plug that off..dont use a breather that would be classified as a "vacuum leak"
"dont use a breather that would be classified as a "vacuum leak"
You sure? Mine has a filter on it, I have no vacume leaks..
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ
WHITECAVY wrote:"dont use a breather that would be classified as a "vacuum leak"
You sure? Mine has a filter on it, I have no vacume leaks..
That means you are letting in air past the throttle body/IAC (or forcing it out under boost). I doubt you have a filter connected directly to the manifold...If you do have another filter, it should be connected directly to your pcv.
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"Youth in Asia"...I don't see anything wrong with that.
Yea most pics I see have a breather coming from there, either sticking out between the manifold runners or off to the side.
Brian Whalen wrote:WHITECAVY wrote:"dont use a breather that would be classified as a "vacuum leak"
You sure? Mine has a filter on it, I have no vacume leaks..
That means you are letting in air past the throttle body/IAC (or forcing it out under boost). I doubt you have a filter connected directly to the manifold...If you do have another filter, it should be connected directly to your pcv.
Brian, thats where my filter is lol..
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD
AUTOMATIC!!
328 HP
306 TQ
Ok so I ordered my flange from chris, and got some vaccum line. Gona go get the bolts and gaskets tomorow, few questions:
1. I use the 2.3 tb gasket with my 2.4 tb right? I know Ill have to cut it a little bigger since my 2.4 tb is bored to 58mm, and Im gona port match my tb opening on the manifold to 58mm.
2.Why do alot of people put a breather on the hose that originaly plugs into the stock intake bong, instead of running it back to their intake if they have an aftermarket pipe? I know you couldnt do that if you use your stock s-tube, but does it matter? Im prolly gona run it back to the intake so I wont have to plug the spot on the intake.
3. Is it absolutely necessary to replace the 5 manifold bolts when using the flange? Chris Fontana said that the stock bolts would work fine, but would this cause a problem? I know I have to get longer studs so you dont have to tell me that.
Thanks for the answers in advance. I know theres been hundreds of threads on the manifold swap, but it seems like something always go wrong for me when I do things like this so I just wana be careful.
Yes you use the 2.3 tb gasket. I have a 59mm tb and i think the opening in the mani is 60mm so i dont think youll have to do anything to the mani. And as for the bolts i had to use longer ones....the stock ones are a little short and i wanted to make sure there was enough threads so i could torque them properly. Also remember that you have to have 2 manifold gaskets!!
If u have any questions my aim sn is futbolman82...
Oh and someone can correct me it i am wrong but i think the pcv off the block doesnt go to the s tube.... it goes to the plastic @!#$ thats connected to the tb after the s tube. Thats why people just plug or put a filter on the pcv. I know i didnt like the @!#$ coming out of the pcv going in to my intake!!
Yea the pcv hooks into the stock intake bong on the tb, but if you get an aftermarket intake pipe most of them provide vaccum line to plug it into the intake pipe.
And I know I need 2 gaskets. Depending on the price Im prolly just gona get 1 2.3, then use some gasket maker on the head side of the flange.
What i did was i got a short ram intake off ebay, it doenst have the hole for the pcv....where are u going to run the pcv to??
Woah.. I made my intake from parts off of airflowonline.com and I just left my PCV hose open. I wasn't aware that there would be any issues at the time, nor had I run into any.
What might/could happen to an engine without a properly connected PCV hose?
-Matt
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WhitePhatt wrote:Woah.. I made my intake from parts off of airflowonline.com and I just left my PCV hose open. I wasn't aware that there would be any issues at the time, nor had I run into any.
What might/could happen to an engine without a properly connected PCV hose?
-Matt
This is a bit of an extreme situation, but...
Dirt, grime and other @!#$ gets into your crank case. some of that may get past the screen on the oil pump pick up and eventually get lodged into the oil passages. Then you get a decrease in oil pressure causing you to spin rod/crank bearing, grind cams, lifters, chain, etc, Your oil filter can only do so much. At the very least, use a pcv breather filter so that large particles don't get into your crank case.
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"Youth in Asia"...I don't see anything wrong with that.
I was thinking about putting a t in the line that goes to the timing cover and running both pcv there.....couldnt hurt anything and u dont have to use a breather filter and it would make it so u dont have to have @!#$ going in to your intake!! Any thoughts??
I have a question about the exhaust gasket with out egr, i all ready put it on my car but not the intake mani. yet i got a check engine light because not enough egr flow if i disconnect the neg. cable and erase thta code will my car pass emmission? with that gasket on and no check engine light?
Bulldog wrote:I was thinking about putting a t in the line that goes to the timing cover and running both pcv there.....couldnt hurt anything and u dont have to use a breather filter and it would make it so u dont have to have @!#$ going in to your intake!! Any thoughts??
The point of the breather or running the line to the intake is so that air that bleeds past the piston rings doesn't get pressurized in the crank case. Running both lines to your timing chain housing doesn't eleviate this because, the housing shares the same mass of air as the crank case... So when the crank case pressurizes, the timing chain housing will pressurize as well.
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"Youth in Asia"...I don't see anything wrong with that.
When using the 2.4 tb do I need to drill out the bolt holes on the manifold or the tb? It looks like I might just need to drill one hole on the manifold. What did you guys who used the 2.4 tb do?
