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Head Gasket Issue

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Old Aug 7, 2010 | 03:04 PM
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Default Head Gasket Issue

Running a 91mm turbo 408. Water seems to be seeping out of the head gasket(one drop about every 30 seconds) when at idle and also after the car has been turned off. I double checked the torque on the bolts and all were good.

So for peace of mind I am going to change my head gaskets. What brand is recommended?
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Old Aug 7, 2010 | 03:13 PM
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I have been having good luck with the Cometic Gaskets, but I have yet to go over 12psi. I understand the problem is not the head gasket but the heads and the 4 bolt per cylinder. The LS1 heads are supposed to handle more boost then the LS3 heads before they push water. I hear 17psi is about all you can expect out of the LS3 heads. Some people have tried to Oring the block, I am not sure how much more boost if any more boost they were able to handle before issues crop back up.

What boost pressure are you running?
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Old Aug 7, 2010 | 03:41 PM
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what heads and what fasteners?
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Old Aug 7, 2010 | 03:42 PM
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Originally Posted by Texas_WS6
What boost pressure are you running?
i was wondering the same thing
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Old Aug 7, 2010 | 04:14 PM
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arp bolts....When it was supercharged it was running 15 psi and since switched over to turbo and haven't pulled any boost yet...just idling and about a week ago we noticed a small puddle under the car and checked to see where it was coming from and the head gasket is the only option it can be. It kinda came out of nowhere.
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Old Aug 7, 2010 | 07:46 PM
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Mine did this the first time I ran it. I checked and checked and found the coolant line were the 1/4" (or so ) hose goes into the cross over tubing was the cause. If you have not put it under boost yet, it might be something symple like that.
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Old Aug 7, 2010 | 11:12 PM
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Originally Posted by STFU racing
Running a 91mm turbo 408. Water seems to be seeping out of the head gasket(one drop about every 30 seconds) when at idle and also after the car has been turned off.
If you are seeping water at idle, head gasket is totally gone. Most likely the rings are bye-bye.
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Old Aug 7, 2010 | 11:39 PM
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Originally Posted by STFU racing
arp bolts....When it was supercharged it was running 15 psi and since switched over to turbo and haven't pulled any boost yet...just idling and about a week ago we noticed a small puddle under the car and checked to see where it was coming from and the head gasket is the only option it can be. It kinda came out of nowhere.
how long did you run 15psi on the sc before you noticed the coolant?
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Old Aug 8, 2010 | 09:57 AM
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so what heads are on this thing?
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Old Aug 8, 2010 | 10:02 AM
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Shawn, whats the max on the L96 heads with cometic gaskets and arp capscrews?
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Old Aug 9, 2010 | 05:02 PM
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who put the heads on?

seen a head gasket put on these engines upside down or backwards do the same stuff. *not me!*

or maybe you got a cracked head *me been there*
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