Blown Head Gasket
04-28-2010, 09:40 AM
#1
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Blown Head Gasket It looks like I've reached my limit on pump gas, somewhere around 15 or 16 psi one of my gaskets went 
. Now what, I was using GM MLS gaskets, so I'm wondering what I need to do. Do I just get another set and keep rolling or do I need some special type of o-ringing or something done. I plan on boosting this this as much as it will take, what would be my best option?
. Now what, I was using GM MLS gaskets, so I'm wondering what I need to do. Do I just get another set and keep rolling or do I need some special type of o-ringing or something done. I plan on boosting this this as much as it will take, what would be my best option? 
04-28-2010, 11:57 AM
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Forged 383 bottom end, stage two 5.3 heads, dual gold valve springs, everything else is in the sig.
Last edited by SuperC1; 05-01-2010 at 06:08 PM. Reason: correction on the heads size
04-28-2010, 12:40 PM
#7
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I'm using arp head studs already, I'm thinking about o-ringing the heads. I was thinking 15psi was kinda low too but I may have over boosted it a bit. I'm only running 13 degrees of timing.
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04-28-2010, 02:29 PM
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Running olsd, I was thinking that was a possibilty also, only have a 2bar tune, so once it went past 15psi it was in no mans land. Looks like a 3 bar upgrade is in order, along with turning down the boost controller a notch or two. A new gasket may be all it needs, but I may do the o-rings for insurance purposes. I wonder how steel gaskets blow, do they just burn through or what?
04-28-2010, 05:05 PM
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And you dont mention CR...so stating timing is meaningless.
It's unlikely its a gasket IMO.
Unless your CR is very high, 15psi shouldnt be a major problem on a well built engine
It's unlikely its a gasket IMO.
Unless your CR is very high, 15psi shouldnt be a major problem on a well built engine
04-29-2010, 09:02 AM
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I used the 6.0 gaskets also, but I didn't use any copper spray. I started tearing down the motor last night. Antifreeze was blowing out from between the #5 and 7 piston. The gasket was still there, so i'm assuming its a warped head. I'll know once I get the head off. Where can I find some copper spray, do the regular parts stores sell it?
04-29-2010, 09:06 AM
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Yep running head studs and cr is high 10.8 to 11.1 thats why the timing is so low and only running 15psi. Between that and the pump gas is probably why the gasket blew.