1dirtyZ

iTrader: (1)

i think i lifted a head today. either that or i have a leaky gasket somwhere.

so what are the symptoms of a lifted head?

i took a pass today and at the top of 4th ( end of the 1/4) the car started tapping, somethink like an exhaust leak. the car didn't pull as hard either on the top end.
as i pulled off to the time booth i noticed that my temp guage was slightly warmer, nothing serious, maybe in the 230 range instead of the 200 - but it settled right away.

when i pulled over i could hear the radiator gurgeling, even though the temp was normal. then after i let it cool a bit i opened the cap , it still held pressure, but the weired thing is that even with the cap all the way off the you could hear the motor bubbeling but the radiator and the water in it weren't.

and when i drove home (3 miles) the car was running great, even with the A/C on it was running cool.

anyone care to explain to me what happened?

1dirtyZ

iTrader: (1)

forgot to mention that there was no oil in the coolant nor coolant in the oil.

BIGBOS

Probably a little detonation up top, could have sprout a small leak in the head gasket, keep an eye on the coolant levels, I wouldn't beat on it for a while, drive it around, any white smoke out the exhaust?

1dirtyZ

iTrader: (1)

the strange thing is that the popping noise i hear at top of fourth was there with the old heads too. the heads i have now are even lower compression than the first ones.
the coolant level hasn't dropped (yet), but i'll double check tommorow.
there is no coolant seeping from the heads or anywhere near the block, i'll double check tommorow.
there was no smoke what so ever from the exhaust.

could it have lifted somwhere where it would vent the cylinder pressure into the atmosphere and a bit into the coolant passages?

i also just thought of this, the head gaskets i have on now are cometic HP gaskets that have been reused sooo many times ( they were under 3 sets of heads).

if it is the head gasket , should i try the factory 6.0 mls or should i go with a flatout gasket?

Black LS1 T/A

White smoke from exhaust (not just condensate at start-up on cool morning)?
Bubbling at radiator cap?
Unexplained sprays of water under the engine compartment after a hard run.
Loss of coolant in short period of time (maybe after some runs at the track).

These are some indications I know of a blown head gasket.

BlwnTA

iTrader: (18)

Yup,,,,I'm there now. And they are Flatout Copper gaskets with the block o-ringed. Pretty disappointed in them. Going to investigate mine next weekend.

NJSPDER

iTrader: (2)

if you did some damage to teh head gasket one thing you will see when you drive around is teh coolant temp will jump arond a good bit. watch the coolant level and temp as you drive, especially when you dig into teh throttle.

later
tim

Shinobi'sZ

I think there is a dye I read about that most Auto stores sell..you put it in and if you have a blown headgaskets or coolant leaking by the head gaskets it shows up. Next time I am in the auto store (autozone, pepboys, kragen, etc..) I wiill check it out. How much boost were you running??? Do you have studs?

1dirtyZ

iTrader: (1)

i do have studs.
the strange thing is that i don't see coolant on the exterior of the motor.
i was seeing 14 psi , but on that run i doubt it, it was more like 8-9 maybe less due to belt slip.

Pro Stock John

iTrader: (34)

Top up the coolant when the car is dead cold, and the next time you check see how much of a drop there is. If you have to top up twice it's losing it.

1dirtyZ

iTrader: (1)

well i i guess i have a blown gasket.
i topped off the coolant this morning ( i lost some after it boiled over ), and i pulled out of the garage and shut it off to change the tires, i then started it again and pulled into the garage ( a total combined running time of 1 min.) and i tried to open the rad cap and it was pressurized under there.

so i guess i have a blown gasket.

any suggestions to which gaskets to go with ? (can i use a 6.0 mls gasket on a 4.030 bore ? or are they bore specific?)

Pro Stock John

iTrader: (34)

Are you sure? When I lifted heads NA I could easily take the cap off. But I would be down 1-3 pints of coolant every time. After a week of driving the exhaust smelled like burning coolant.

1dirtyZ

iTrader: (1)

the cap was easy to take off, but the water would squirt out even though it was cold.
i really don't want to drive it, so i'll probably be taking the heads off tomorow.

psj, what gaskets are you running?

frcefed98

iTrader: (16)

FWIW I run the GM 6.0 MLS gaskets on my 348/6.0L head set up.

1dirtyZ

iTrader: (1)

forcefed, did you use anything to coat them? or did you install them heads up.

1dirtyZ

iTrader: (1)

are there different part numbers for different 6.0 gaskets? i.e. which gasket to get for 4.030 bore?

frcefed98

iTrader: (16)

I didn't use any coating per the guy at scoggin dickey. Just installed them dry. I can't remember the PN but I searched the web and found this lil bit of info. I hope this helps.
The stock 6.0L MLS truck block cylinder head gasket is 0.038-inch thick and displaces 11 cc's. Gaskets are not available separately; order gasket kit PN 89017253.

J

frcefed98

iTrader: (16)

*EDIT* Ok, found out the right PN, they are 27.60 from scoggin now. Here is the PN 12575392.
http://www.sdpc2000.com/search.asp?s...5392&doQuery=1
Give Vents a PM maybe he can hook you up with a deal.
J

1dirtyZ

iTrader: (1)

crap! how sure are you of the thickness, i'm set up right now for a .057 thick gasket (cometic).
i don't need any more compression!
thanks for the heads up forcefed, i was going to get a set on monday, but guess not now.

frcefed98

iTrader: (16)

not real sure, that was from an article from hot rod.com
Call Scoggin on monday or PM Harlan(Y2Khawk). He knows the thickness for sure on these 6.0's
J