LS6 valley cover or Catch Can

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Aug 17, 2016 | 09:00 AM

klinznilk

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LS6 valley cover or Catch Can

Can anyone tell me if it is better to run one version vs the other?

Currently have a 2002 WS6 that is getting heads/cam/intake done which will include a FAST 92 setup and was wondering if i should address the PCV system while im tearing down. Was going to purchase a mighty mouse can but was debating just changing the valley cover to a ls6 style (built in)

Any advise / recommendation would be appreciated as definitely do not want to work on this intake area more than once

Aug 17, 2016 | 10:50 AM

bbond105

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Do both. The LS6 valley cover will let you remove a lot of hoses on your engine and will make it look a lot better.

Last edited by bbond105; Aug 17, 2016 at 01:40 PM.

Aug 17, 2016 | 12:01 PM

dr_whigham

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Both, without question.

Aug 18, 2016 | 12:54 AM

klinznilk

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Thanks guys!

Aug 18, 2016 | 02:32 PM

BREWS02WS6

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Agree. I did only the LS6 valley cover and have discovered oil mist in the FAST, so now I'm getting a catch can.

Aug 19, 2016 | 01:15 AM

bigsticksupra

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if your car had an oil consumption issue before the LS6 valley cover will take care of most of it. i have both but probably didnt really need the catch can as it doesn't catch much and my IM is dry.

Aug 20, 2016 | 08:16 PM

Paul Bell

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Yes, do both, especially if your engine has miles on it. My home-grown catch in my 250K+ miles truck can gets this much at every oil change-and I also have the LS6 PCV setup. My intake is bone dry.

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Aug 22, 2016 | 07:20 AM

IDriveChevy

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Yep I run both to be safe, a few bucks to curb oil consumption is worth it.

Aug 23, 2016 | 09:39 AM

#10

Redbull87

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I thought about doing this on my lq4 since I have a turbo but wondering on the gen 3 lq4 would I need to modify the block like ls1s would need to grind the block?

Aug 23, 2016 | 09:49 AM

#11

Paul Bell

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Only the LS1 blocks needed the grinding mod.

Last edited by Paul Bell; Aug 26, 2016 at 08:14 AM.

Aug 23, 2016 | 10:34 PM

#12

juniorssrollin

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Yep, do both!

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LS6 valley cover or Catch Can-20160820_135447.jpg

Aug 24, 2016 | 12:34 AM

#13

AiDRocks

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Thanks folks! Got another thing to added to the parts cart. LOL

Aug 24, 2016 | 11:21 AM

#14

blackbyrd

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Quote:

Originally Posted by Paul Bell

Only the LS1/6 blocks needed the grinding mod.

I thought all the iron blocks had to be modified to use the ls6 pcv breather port?

Aug 25, 2016 | 07:47 AM

#15

Paul Bell

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Even the aluminum LM4 block in my truck did NOT need to have the lump removed to clear the LS6 plate. It's only the LS1 blocks.

Last edited by Paul Bell; Aug 26, 2016 at 08:15 AM.

Aug 25, 2016 | 08:18 AM

#16

blackbyrd

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thats great news for me, as that was kind of holding me back from that mod

Aug 25, 2016 | 04:01 PM

#17

King23

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I have a 2000 lq4 and it didn't need to be modified so you should be good.

Aug 26, 2016 | 08:16 AM

#18

Paul Bell

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I had to correct myself-why would the LS6 block need to have the lump removed to accommodate the LS6 valley plate??

It's just the LS1 block.

Aug 26, 2016 | 09:40 AM

#19

blackbyrd

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^ i didn't even catch that haha.

I have breathers on both of my valve covers and everything else is capped off, but I have thought about adding the ls6 valley cover, though I have never really had any issues with consumption that I am aware of. I still think it wouldnt be bad with my setup.