npp in a box question
Thread Starter
Racer
Joined: Mar 2008
Posts: 389
Likes: 19
From: Cape coral Florida
npp in a box question
I have been trying to install npp in abox on my 08.The vacuum port is on the rear of the engine.As per instructions I have been unable to get this cap off the vacuum port tried all the hints that were posted before it's a real PITA took coil pack off and as much as I tried no luck.Called the dealer he tells me I can put a tee in the brake vacuum booster line and pull vacuum there.Anyone with knowledge tell me if that would work
Anyone with some ideas would be greatly appreciated don't want to have to pull the intake off to do this mod which is what the dealer says he would have to do to much $
Anyone with some ideas would be greatly appreciated don't want to have to pull the intake off to do this mod which is what the dealer says he would have to do to much $
Drifting
Joined: Oct 2007
Posts: 1,565
Likes: 2
From: The Great Pacific Northwest...........I carry a gun cause a cops too heavy.
Yes, you could pull vacuum using the brake booster line as it gets its vacuum from the intake manifold. Its all from the same source so I see no reason it wouldn't work just fine. Good luck, It'll be well worth the effort.
Thread Starter
Racer
Joined: Mar 2008
Posts: 389
Likes: 19
From: Cape coral Florida
Yes I have the ls3 and it has been real trying.The cap has two little like ears on it and they have broken off and the cap is still on Just great I'm kinda in a muck as to what to do
Le Mans Master
Joined: Oct 2005
Posts: 6,503
Likes: 2
From: Oklahoma City OK
When adding NPP to my LS3 I broke off the ears on the rear nipple and kept working that little thing until it came off. I think i was able to get some small plyers back there and it finally gave way. Plugged in the hose and all was good.
Melting Slicks
Joined: May 2004
Posts: 3,017
Likes: 2
I used an exact knife duct taped to a nutdriver. That gave me the length to get back there. I used the little plastic bar for leverage. Remember it is supposed to look like a barb fitting when you get done. Some have cut too close to the manifold taking the barb off..
Here is the Tee cut off, but held on by duct tape for illustration..
Here is the Tee cut off, but held on by duct tape for illustration..
Le Mans Master
Joined: Oct 2005
Posts: 6,503
Likes: 2
From: Oklahoma City OK
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Le Mans Master
Joined: Sep 2001
Posts: 5,857
Likes: 84
From: Gainesville VA
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
I did it by driving up the front on ramps (race ramps) and jacking the rear and putting jack stands under the rear recommended jacking points. Plenty of room to runt the vacuum lines through the torque tube tunnel and tie everything in place.
Instructor
Joined: Oct 2009
Posts: 102
Likes: 0
From: Tennessee
Great! My B&B exhaust is coming today and I'd really like to get it on. Wonder if my regular jack will fit under the back or if I'll have to buy a low profile. I have ramps, but I'll definitely have to get some 2x4s to get the vette on there. It is for sure going to drag!
Advanced
Joined: Feb 2014
Posts: 68
Likes: 4
From: Monterey, Ca
Mine is an 07 with LS2. Been feeling around back there and don't feel a thing. Could i get a picture of the 12mm socket method?
I'm also looking for suggestions of how to get my fat #^& under the thing to do Anything at home.
I'm also looking for suggestions of how to get my fat #^& under the thing to do Anything at home.
Burning Brakes
Joined: Jul 2014
Posts: 781
Likes: 84
From: Dayton OH
Advanced
Joined: Feb 2014
Posts: 68
Likes: 4
From: Monterey, Ca
Finally found the dang thing. Loosened the coil pack on the pass side and used a hacksaw blade and cut it off. I accidentally broke off the little tab on the right side which made sawing it off a piece of cake.
Now i'll go find the bandaids.
Now i'll go find the bandaids.
Burning Brakes
Joined: Feb 2006
Posts: 861
Likes: 33
From: San Antonio Texas
P.S. I know if I turned my car on I'd have a "vacuum leak" ... but what does that mean? Is my car undrive-able until I get this hose connected?
Last edited by vara411; Sep 20, 2015 at 04:18 PM.
Le Mans Master
Joined: Oct 2014
Posts: 8,672
Likes: 2,726
From: Atlanta GA
Vara , if u opened up the port , then yes you cannot leave it open
if u need to drive the car , just get a small length of vacuum line hose , plug the end with the appropriate size bolt or what ever you can put in the hose and then slide the hose on the nipple
this will plug your vacuum leak till you get time to run the hose
Dave
if u need to drive the car , just get a small length of vacuum line hose , plug the end with the appropriate size bolt or what ever you can put in the hose and then slide the hose on the nipple
this will plug your vacuum leak till you get time to run the hose
Dave
Last edited by Dcasole; Sep 20, 2015 at 08:16 PM. Reason: edit
Burning Brakes
Joined: Feb 2006
Posts: 861
Likes: 33
From: San Antonio Texas
Vara , if u opened up the port , then yes you cannot leave it open
if u need to drive the car , just get a small length of vacuum line hose , plug the end with the appropriate size bolt or what ever you can put in the hose and then slide the hose on the nipple
this will plug your vacuum leak till you get time to run the hose
Dave
if u need to drive the car , just get a small length of vacuum line hose , plug the end with the appropriate size bolt or what ever you can put in the hose and then slide the hose on the nipple
this will plug your vacuum leak till you get time to run the hose
Dave