2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Is this the correct intake gasket?

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Old 06-16-2017, 12:25 AM
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Is this the correct intake gasket?

I got a lot done after work in 4 hours considering I had to run out and get 3 longer alternator bracket bolts. My question is, before putting on the intake, is this gasket correct?
I guess I should mention this is my 2.4 that's getting supercharged.




Old 06-16-2017, 01:34 AM
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The pcv orifice is in a different location on the 2.4. I use the zzp paper intake gasket and cut a channel in the gasket for the pcv gasses to pass through. Additionally, i cut a channel into the flange of the manifold to allow the gasses to flow through more easily.
Old 06-16-2017, 08:58 AM
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Originally Posted by Slowbalt2000
i cut a channel into the flange of the manifold to allow the gasses to flow through more easily.
That sounds like a must...

Damn....this will set me back a couple days. Where was that in Beck's build? I was trying to knock this out in 5-6 hours.

EDIT: I ordered some FelPro gasket material from a local store and with my gasket hole punches I will make my own custom gasket and if I am really ambitious, put the intake in my mill to make a channel.... thanks Slowbalt.

Considering 9/10 ths of everyone that initially said they were going to do this in Beck's thread gave up and sold their parts or never bought them, I wonder how many others never ported for the pcv.

Last edited by Henry3959; 06-16-2017 at 10:51 AM.
Old 06-16-2017, 11:55 AM
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Most people just block it off and dont care but on my car, after running for a few minutes it would begin to misfire. Im assuming because the pressure was building in the crankcase.
Old 06-16-2017, 12:08 PM
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No doubt... I was a Chevrolet / Cadillac Tech my first 9 years out of college and remember a Buick that had the old rope seal rear main and it had a (no crap) steady stream oil leak. The PCV hose was soft and had sucked close. Replaced the hose and not a drop leaked.

With this going from NA to boosted I don't want an engine that doesn't have any leaks now starting to hemorrhage oil.
Old 06-16-2017, 12:12 PM
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I dont blame you
Old 06-16-2017, 12:32 PM
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I never did that. I think I'm still using my stock gasket.
Old 06-16-2017, 01:00 PM
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I've done both the channel and just blocked it off and didn't notice a significant difference. Pressure will only build in the crank case if you have the nipple blocked off on the camshaft cover. If you do that combined with a blocked off PCV port on the head you will pop your dipstick every time.
Old 06-16-2017, 01:21 PM
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I'm planning on making a new gasket but I think if I cut the steel gasket like this and channel the manifold to match with a little RTV sealer around it, would be much quicker and probably just as good. Had I known all these other little snafu's I would have had them ready before starting.

Old 06-16-2017, 01:29 PM
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Originally Posted by HGT
I'm planning on making a new gasket but I think if I cut the steel gasket like this and channel the manifold to match with a little RTV sealer around it, would be much quicker and probably just as good. Had I known all these other little snafu's I would have had them ready before starting.
That's the way it seems to go. Have you ever considered a phenolic spacer? They make it easy to make a channel.
Old 06-16-2017, 01:32 PM
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Yes... contacted Tim at ZZP first thing this am for gaskets as they are out of the spacer and still no word. I am already pushing the SC into the front support. I figured that would make it even worse. The 1/16" gasket material will be better than the steel shim gasket but not anything like the phenolic spacer.

Want to next day it to me
Old 06-16-2017, 01:36 PM
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I hear you and are you actually hitting the front support yet or just close? I also have a SC to IM spacer I was considering using and was worried about possibly getting into that support. What would you do if you were hitting? Would you just bash it in a little or actually cut and weld in a pocket?
Old 06-16-2017, 01:38 PM
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Start reading at the bottom of page 2

https://www.cobaltss.net/forums/2-4l...40/index2.html

I am going to pocket it out.... I want this to look like it came this way.
Old 06-17-2017, 01:17 AM
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Made a custom 1/8" gasket today after work from Mr. Gasket material. My gasket punches worked very well. Copper coated both sides before installing the intake. I gave up on getting the factory heat exchanger to fit the single fan Sport. The 2 tubes are meant to come up side of the dual fans. One runs right into the fan shroud and the other into the lower sensor.

Getting the belt on was a PITA. Stage 2 belts are almost too short for the 3.1 pulley. Need to wire the MAF and TMAP tomorrow sometime then I might hack off the Heat Exchanger pipes just so I can drive it Monday untill the ZZP Heat exchanger shows up.



Flash pics suck so I'll have something nicer to show Sunday.

Old 06-17-2017, 01:39 PM
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Damn that all looks really nice. What did you use for a gasket punch?
Old 06-17-2017, 01:53 PM
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I'm sure I got it at Harbor Freight. The 32mm did the runner holes nice. Just had to trim the center where they came together.

Old 06-17-2017, 01:56 PM
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After I get back from the ball game I will start on the connectors and finish replacing the petrified split loom.
Old 06-17-2017, 02:38 PM
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Damn thats pretty sweet. Did you use the stock gasket to trace onto the material?
Old 06-17-2017, 03:14 PM
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Traced the major ports then added the CV port.

Last edited by Henry3959; 06-17-2017 at 08:08 PM.




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