Lifting The Heads?
Lifting The Heads? i read a couple post on here and was curious. i am getting a lot of coolant out of my overflow. and on a few post it suggest that i may be lifing heads, accorinding to some other peoples experiences. i was wondering though if i was to lift the heads wouldnt i lose power on the dyno. it did it on the dyno and never lost at all. wouldnt i have noticed something. what do you think
I hit 13#'s on a cool day and do not lift my heads. Most hit alot higher numbers when thier heads lift up. If you lifted your heads you would get signs in your coolant and your oil as if you blew a head gasket. Not to mention a whole lot of other issues.
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9 Second Club
Joined: Feb 2002
Posts: 985
Likes: 7
From: Lake Orion, MI
Blowing coolant out the overflow tank is usually one of two things.
The first is that you've overfilled the radiator and overflow container. Some replacement overflow containers are smaller than the stock container or a larger than stock radiators could contribute to this overflow problem. You might have to find the new balance point when using different pieces in the coolant system.
The second choice is that it is possible that you've got a small burn in one of the head gaskets and your pressurizeing the coolant system with exhaust gasses passing into the coolant passage. That in turn will push more coolant into the overflow tank and blow it out.
Rick
The first is that you've overfilled the radiator and overflow container. Some replacement overflow containers are smaller than the stock container or a larger than stock radiators could contribute to this overflow problem. You might have to find the new balance point when using different pieces in the coolant system.
The second choice is that it is possible that you've got a small burn in one of the head gaskets and your pressurizeing the coolant system with exhaust gasses passing into the coolant passage. That in turn will push more coolant into the overflow tank and blow it out.
Rick
Originally Posted by KAOS
i read a couple post on here and was curious. i am getting a lot of coolant out of my overflow. and on a few post it suggest that i may be lifing heads, accorinding to some other peoples experiences. i was wondering though if i was to lift the heads wouldnt i lose power on the dyno. it did it on the dyno and never lost at all. wouldnt i have noticed something. what do you think
For the other person to suggest that you could not lift your heads at 9psi is nonsense. If they were not torqued properly, or if you are not using head studs, or the gasket was weak, any of these could cause boost to leak in the coolant. I cant believe he would make that statement especially considering he did not build your engine.
SOLUTION:
The heads need to come off, and the gasket needs to be inspected. If you continue, you could contaminate the oil supply with coolant.
9Psi on factory bolts, or even ARP bolts are not recommended, you need to use head studs.
Get it checked asap.
i am using arp head studs. and i torqued them, even though thats not saying much. i am using gm 6l metal head gaskets. so coolant would show up in the oil now? its only been doing it for a day so should i see some sort of coolant in the oil at this time. also i did have a little too much coolant in the over flow, it is now drained. have a few other item to straighten up so i will check. but my question is: wouldnt i lose power if i was blowing gases out. on the dyno i had this problem and never lost any power what so ever.
Originally Posted by ABeasst
you cant use 6.0 MLS gaskets on a 98 because of the infamous notch in the heads
9 Second Club
Joined: Feb 2002
Posts: 985
Likes: 7
From: Lake Orion, MI
A burned passage between the coolant path and the fire ring is the standard weak point on the gaskets. The idea is it's better to have it there then to oil. So aren't loosing enough hot gasses to notice much on the power change if at all. It will take some time before you notice the milk shake goo on the Oil filler cap. That's what you would use to officially confirm that the gasket is burned.
Rick
Rick
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Teching In
Joined: Mar 2002
Posts: 40
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Originally Posted by KAOS
what would the coolant look like? it looked as though i had some extra coolant in the over flow so im going to let some out and try it again.
http://plone.shoberg.net/CarStuff/Pi...riant/original
Drain the entire system (including block) to check it.
There is some additive you can buy at Autozone that you pour in the coolant. It'll bind to oil and will flouresce with a black light on the coolant in the radiator. That'll tell ya'.
