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98 Ls1 Catch Can Install Help

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Old Jan 3, 2017 | 03:57 PM
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Default 98 Ls1 Catch Can Install Help

Hey guys. I have been reading a tonne of catch can install s and 98 catch can systems but I am still not clear how to put this thing in.

98 has the pcv valve between the 2nd and 3rd fuel injector. The pipe from the intake to the valve is either metal or hard plastic and looks like 1 piece.

In my eyes, do i have to cut the one piece tubing in 2 places and remove the smooth elbow in the pipe and then run rubber hose with worm clamps from pvc side to can and then can to cut pipe just before manifold?

Is this pipe 1 piece to the manifold? Is there a connector at the manifold that separates from the pipe im talking about? I tried pulling it out of the manifold but i was scared to break it so I didnt pull too hard.

Am i making sense? Can someone shine some light on this please?
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Old Jan 3, 2017 | 04:08 PM
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Remove all the old pcv lines except for the one runnin from the tb to the passenger valve cover. Next cap off the rear passenger side valve cover port. Run a line from the dirty side of the can to the rear hole on the drivers side valve cover. What catch can do you have? If you don't have one with an internal pcv your pcv valve will go online here. The other port on the catch can just goes straight to the intake port behind the tb
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Old Jan 3, 2017 | 05:32 PM
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Do I have to remove all the old pcv lines in order to use my catch can?

I have the Norris catch can with no pcv. If i remove all the lines, how would i connect to the manifold? Is there a nipple that sticks out to connect once the old is removed or will there be a gapping whole.
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Old Jan 3, 2017 | 07:23 PM
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Yes you need to remove all the pcv stuff, there is a nipple on the manifold you'll connect the hose too
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Old Jan 4, 2017 | 11:57 AM
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This is how mine is routed. From the intake manifold to the can, from the can to a pcv valve, from the valve to the drivers nip. From the passenger nip to a check valve that only allows fresh air in, from the check valve to the throttle body. Crappy pic for reference. All of that is mentioned in reverse order of flow, sorry I work 3rd shift.

Mine was a 98, has 243 heads now. Also save the hard plastic lines and re use them for easier hose routing.

Edit: I also saved and reused the pcv valve holder for extra ease of maintenance.
Attached Thumbnails 98 Ls1 Catch Can Install Help-img_20161107_143155.jpg  
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Old Jan 4, 2017 | 03:46 PM
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That's essentially the same way I told him to route it just different placement of the lines. It doesn't matter which doesn't to the pass and which goes to the drivers side. Pcv placement I only prefer between the can and intake for ease of accessibility
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Old Jan 4, 2017 | 05:36 PM
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Thanks for the advice guys, things are making more sense now. The hard tubing and not noticing a nipple at the manifold was throwing me off.

I will leave everything behind my pcv valve alone. Change the pcv valve and run 3/8 fuel line to my catch can and then tubing from can to manifold. Should work fine, I don't notice my car burning much oil as it is setup right now.

I was thinking of trying out wrapping my can in exhaust wrap to keep it a little cooler if I have time to burn.
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Old Jan 4, 2017 | 09:35 PM
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Originally Posted by WS6wanted
Thanks for the advice guys, things are making more sense now. The hard tubing and not noticing a nipple at the manifold was throwing me off.

I will leave everything behind my pcv valve alone. Change the pcv valve and run 3/8 fuel line to my catch can and then tubing from can to manifold. Should work fine, I don't notice my car burning much oil as it is setup right now.

I was thinking of trying out wrapping my can in exhaust wrap to keep it a little cooler if I have time to burn.
I would advise taking the foam off of the pcv lines and replacing the softer parts. It's not all plastic if I remember correctly and mine were rotted pretty bad. I used silicone runs of hose to fill in where the old soft hoses were. There was a piece from the drivers valve cover to the corner of the intake on the passenger side, then there's a 90° plastic tube, then another small run of silicone hose, then the pcv holder, then silicone hose to my catch can. I think I remember cutting the plastic pieces to fit my setup, and painting them black so they didn't stick out. I only re used the plastic pieces so that they would clip onto the intake via those plastic clips and keep everything nice and tucked close to the intake.
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Old Jan 5, 2017 | 04:35 AM
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Was your elbow coming off the driver side valve cover and the pcv holder rotted at all? You just had to replace straight pieces of soft rotted hose? Do you remember the size, was it 3/8 silicone and hose clamps you used?

B][/B]
Originally Posted by SlasherVRGR
I would advise

taking the foam off of the pcv lines and replacing the softer parts. It's not all plastic if I remember correctly and mine were rotted pretty bad. I used silicone runs of hose to fill in where the old soft hoses were. There was a piece from the drivers valve cover to the corner of the intake on the passenger side, then there's a 90° plastic tube, then another small run of silicone hose, then the pcv holder, then silicone hose to my catch can. I think I remember cutting the plastic pieces to fit my setup, and painting them black so they didn't stick out. I only re used the plastic pieces so that they would clip onto the intake via those plastic clips and keep everything nice and tucked close to the intake.
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