L92's Turbo & blown Copper head gaskets...
02-01-2007, 01:35 PM
#41
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Originally Posted by thunder550
Sell me your turbo kit! 
It should be running in a few hours. Just have to torque the heads and put the rest of it together.
02-01-2007, 03:09 PM
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I run about 20 passes with the 6 second engine without changing gaskets. It leaks a bit on every run, but we forgive it because its running 6's.
My truck is a turbo 6 litre that runs about 15psi average boost. The turbo engine has been in it since 27 miles on the clock, it is now 56,000. I have changed the head gaskets once, they were not blown but did show signs of leakage. My truck has GM mls gaskets with factory bolts tightened per GM specs.
Kurt
My truck is a turbo 6 litre that runs about 15psi average boost. The turbo engine has been in it since 27 miles on the clock, it is now 56,000. I have changed the head gaskets once, they were not blown but did show signs of leakage. My truck has GM mls gaskets with factory bolts tightened per GM specs.
Kurt
02-01-2007, 03:10 PM
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Originally Posted by 427
I run about 20 passes with the 6 second engine without changing gaskets. It leaks a bit on every run, but we forgive it because its running 6's.
My truck is a turbo 6 litre that runs about 15psi average boost. The turbo engine has been in it since 27 miles on the clock, it is now 56,000. I have changed the head gaskets once, they were not blown but did show signs of leakage. My truck has GM mls gaskets with factory bolts tightened per GM specs.
Kurt
My truck is a turbo 6 litre that runs about 15psi average boost. The turbo engine has been in it since 27 miles on the clock, it is now 56,000. I have changed the head gaskets once, they were not blown but did show signs of leakage. My truck has GM mls gaskets with factory bolts tightened per GM specs.
Kurt
02-01-2007, 03:11 PM
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Originally Posted by Slowhawk
There is some weird there.We make a ton more power than you are with factory heads and stock gaskets without issue's.
The only difference I see is that we always torque the heads to 85ft/lbs with the lube and never retorque them.
The only difference I see is that we always torque the heads to 85ft/lbs with the lube and never retorque them.
02-01-2007, 03:17 PM
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Originally Posted by Slowhawk
There is some weird there.We make a ton more power than you are with factory heads and stock gaskets without issue's.
The only difference I see is that we always torque the heads to 85ft/lbs with the lube and never retorque them.
The only difference I see is that we always torque the heads to 85ft/lbs with the lube and never retorque them.
He's using copper.
02-01-2007, 03:22 PM
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Originally Posted by TurboGibbs
You use the solid copper and o rings?
02-01-2007, 03:33 PM
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Originally Posted by GMC_DUDE
Maybe that's the problem??? Perhaps there is something about Gen3 engines that makes them incompatible with this technology?
I have wondered if the stock heads are doing something funny by bowing around the oring area due to the thin head surfaces but, if they have found a way to do it then that's great.
More detail would be great.
02-01-2007, 03:44 PM
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Originally Posted by TurboGibbs
What I got from that is Slowhawk is running the copper and orings but torqed to 85lbs with no re-torque and stock heads.
I have wondered if the stock heads are doing something funny by bowing around the oring area due to the thin head surfaces but, if they have found a way to do it then that's great. More detail would be great.
I have wondered if the stock heads are doing something funny by bowing around the oring area due to the thin head surfaces but, if they have found a way to do it then that's great.
More detail would be great.
02-01-2007, 04:36 PM
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Originally Posted by 427
We use the SCE copper with o-ring/reciever groove combo, 1/2 head studs at 100ft lbs to seat, then a retorque to final specs.
Kurt
Kurt
What part number do you use for the gaskets.
02-01-2007, 04:43 PM
#56
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Is it the pic quality or do those heads have a rough finish to them? Many times when I have seen folks have problems with heads leaking, na or otherwise, it's either something wrong with the heads or improper torquing of the head bolts.
I don't have street miles on my stuff, but my heads (AllPros) have seen 26psi, no o-rings, and GM MLS head gaskets. When I had 6.0 heads they saw 21.5psi.
I don't have street miles on my stuff, but my heads (AllPros) have seen 26psi, no o-rings, and GM MLS head gaskets. When I had 6.0 heads they saw 21.5psi.
02-01-2007, 06:27 PM
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Originally Posted by Pro Stock John
Is it the pic quality or do those heads have a rough finish to them? Many times when I have seen folks have problems with heads leaking, na or otherwise, it's either something wrong with the heads or improper torquing of the head bolts.
I don't have street miles on my stuff, but my heads (AllPros) have seen 26psi, no o-rings, and GM MLS head gaskets. When I had 6.0 heads they saw 21.5psi.
I don't have street miles on my stuff, but my heads (AllPros) have seen 26psi, no o-rings, and GM MLS head gaskets. When I had 6.0 heads they saw 21.5psi.
Just for ***** and giggles here is pics of the mls gaskets that were on the same 6.0 with 317's 13 psi and 2000 miles. Also, my stock MLS's off my old Radixed 4.8 13psi looked almost identical to these. 4.8 was a virgin engine and the 6.0 had arp bolts, I now have studs.
As I said, my 4.8 gaskets look the same and they were installed by GM. I can take pics of them if you'd like. What i'm trying to prove is this isn't isolated to this one block. I'm sure many of you have seen gaskets off of yours that looked just like these.