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Overheating issue after LS6 intake?

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Old May 13, 2008 | 06:42 PM
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Default Overheating issue after LS6 intake?
I was told by someone that by using the coolant plugs to plug the rear coolant lines, causes the car to overheat.

is this true? and if so, should i just use another front coolant crossover pipe?
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Old May 13, 2008 | 07:37 PM
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Originally Posted by bmxer8699
I was told by someone that by using the coolant plugs to plug the rear coolant lines, causes the car to overheat.

is this true? and if so, should i just use another front coolant crossover pipe?
If that were true , don't you think GM would not have used them on thier cars ?
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Old May 13, 2008 | 07:55 PM
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No you're fine.
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Old May 13, 2008 | 09:47 PM
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ah alright, so just use the rear plugs and be done with it?
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Old May 13, 2008 | 11:32 PM
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I've ran mine with block off plugs in 110 degree heat hard and never had any problems.
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Old May 14, 2008 | 10:49 AM
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I just ground down the bottom of the LS6 manifold to fit over the older LS1 style steam/head vents.

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Old May 14, 2008 | 11:34 AM
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After 147,000 miles I have seen no problem with over heating ..
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Old May 14, 2008 | 12:29 PM
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Lies, all lies!
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Old May 14, 2008 | 01:54 PM
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alright going on today
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Old May 14, 2008 | 03:27 PM
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Can you guys explain the overheating problem, this is the first i have heard about it when installing an LS6 on the LS1.
-Joel
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Old May 14, 2008 | 04:05 PM
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a mechanic told me The rear 2 cylinders have overheating issues if you use the rear plugs.
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Old May 14, 2008 | 04:33 PM
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Originally Posted by bmxer8699
a mechanic told me The rear 2 cylinders have overheating issues if you use the rear plugs.
Get a new mechanic. Theres no reason not to use the plugs. The 2001+ LS1 motors came this way from the factory!
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Old May 14, 2008 | 07:46 PM
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So from what im understanding you can't just install an LS6 and be done with it? I thought for an LS1 all you have to do is trim the bottom/new coolant lines, and thats it. Again im still with the LS1 intake, so this information can help me in the future.
-Joel
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Old May 14, 2008 | 07:48 PM
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From: dfw
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^ you can grind down the ribs of the ls6, or use a front coolant crossover pipe and 2 rear plugs.
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Old May 14, 2008 | 08:08 PM
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From what i understand it was called 'steam vent' and was to go back to the TB, then to the coolant tank which sat higher. If you were getting air somewhere in the system this is how it would bleed out. Otherwise you may have an air pocket somewhere in the system. This is just what i have read and what i understood from it. I ran mine to my radiator in my swap, didnt know i could block it off.
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Old May 14, 2008 | 09:13 PM
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Originally Posted by bmxer8699
^ you can grind down the ribs of the ls6, or use a front coolant crossover pipe and 2 rear plugs.
So if you run the LS6 coolant pipes, and cover off the rear thats were people are encountring the overheating problem. So for those that just grind down the tabs under the intake, they don't un into this problem correct?
-Joel
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Old May 14, 2008 | 09:53 PM
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correct,^^

as for the overheating issue, i will find out after it stops raining and i can go thrash on my car,
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Old May 15, 2008 | 01:31 AM
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Oh Ok, thanks for the info.
-Joel
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