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LS6 intake install

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Old Nov 2, 2011 | 04:38 PM
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Default LS6 intake install

Hi folks,

If I find an LS6 intake, and install it on my 2000 coupe, what all do I need to do so?

Is it a direct interchange or do I need more than just the intake itself?

If this question has been asked before, I apologise.

Ron
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Old Nov 2, 2011 | 04:59 PM
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Direct fit, but you'll either need the ls6 front coolant crossover lines and rear plugs or you'd have to modify the intake if you want to reuse the ls1 coolant crossover line
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Old Nov 2, 2011 | 09:24 PM
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also, be careful on the small vacuum line in the back. if you dont get that back on right your AC vents wont switch from top to defrost to bottom. a lot of people put a length of rubber tubing on the hard plastic line to make things easier. there are pictures here on how to modify the intake. you basically have to remove the casting fins from the bottom of the intake.
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Old Nov 2, 2011 | 09:58 PM
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Excellent. Thanks a ton. I remember the underside mod.
And extending the vacuum line is a great tip.

My first LS engine to play with. Now I just need an LS6 intake......

BTW, what is the deal with the LS6 tray under the intake that can be added to the LS1? Part of the crancase ventillation?

Ron
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Old Nov 2, 2011 | 10:53 PM
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Originally Posted by RonSSNova
Now I just need an LS6 intake......
It does not have to be off an LS6. All 2001-04 LS1 and LS6 intake manifolds are the same.
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Old Nov 2, 2011 | 10:57 PM
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Originally Posted by lucky131969
It does not have to be off an LS6. All 2001-04 LS1 and LS6 intake manifolds are the same.
Right arm.

Just check the underside for the obvious difference to yours. There have been cases where some have tried to sell LS1s as "LS6"s (later models).
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Old Nov 2, 2011 | 11:12 PM
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Yep, I know that. Which is why it puzzles me that they are so expensive used.

Ron


Originally Posted by lucky131969
It does not have to be off an LS6. All 2001-04 LS1 and LS6 intake manifolds are the same.
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Old Nov 3, 2011 | 12:27 AM
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Ron, I've got one sitting in my basement not doing me any good.. I had it on my '99 Z28.. It's pre cut on the bottom to allow your LS1 coolant lines. Also has a new MAP Sensor on it.. Shoot me a PM if you want it
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Old Nov 3, 2011 | 07:04 AM
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Originally Posted by RonSSNova

BTW, what is the deal with the LS6 tray under the intake that can be added to the LS1? Part of the crancase ventillation?

Ron

that is the valley tray. it has to do with the pcv system. the ls6 one is better than the ls1.
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Old Nov 3, 2011 | 11:33 AM
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While the intake is off---I would also switch the LS1 "valley cover" to a newer "LS6 vallry cover " These engines are notorious for sucking up oil into your intake manifold via your PCV sytem----
Take off or open up your throttle body and look inside of it with a flashlight--You'll be shocked to see how oil soaked it is---If its dry then that is very rare-- LS6 valley is about $75 and takes some re-routng of your PCV lines but will prevent oil fouling of your spark plugs-and contamination of your intake charge-----More HP ?? well maybe if its real bad and dripping with oil ( I've seen some manifolds that were taken off a LS1 and set on the garage floor standing upright--and they left a puddle of oil 10-12" wide !!!!! )
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Old Nov 3, 2011 | 12:48 PM
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I peered in there when I had the TB off. A little oily, but not bad. The TB on the other hand was filthy.
Is the LS6 valley tray available new?
An oil catch can also sounds like a good idea.
The plan is for heads and cam over the winter, as long as it doesn't get too cold out......yeah right. I'll get a heater.
I am still in the planning phase..........and picking up pieces here and there.

Thanks

Ron
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Old Nov 4, 2011 | 09:49 AM
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Originally Posted by rmata
Direct fit, but you'll either need the ls6 front coolant crossover lines and rear plugs or you'd have to modify the intake if you want to reuse the ls1 coolant crossover line
I just installed mine a few ago, i opted to keep the same coolant lines. All i needed to do was knock off the fins on the underside with a chisel, then i took a hi speed grinder with a sanding disk and smoothed them down flush. The intake bolted down perfectly. Next on my mod list is a ported TB. Lol
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Old Nov 4, 2011 | 10:25 AM
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http://ls1howto.com/index.php?article=5
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Old Nov 4, 2011 | 10:28 AM
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Originally Posted by Tech
I should have looked here!

Doh!

Ron
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