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Pressurizing the **COOLANT SYSTEM?**

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Old Sep 11, 2005 | 12:32 AM
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Default Pressurizing the **COOLANT SYSTEM?**
Have any of you boosted guys had any problems with pressurizing the coolant system?

How much boost were you running, with what compression ratio and what head gaskets?

What did you determine was the problem and how did you fix it?
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Old Sep 11, 2005 | 12:36 AM
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blown head gasket in my case. 10psi on stock 6l heads and gaskets. havent had a chance to see if i fixed it, waiting on new turbo kit.
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Old Sep 11, 2005 | 12:40 AM
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I seen two cars do this. One was one the spray and the other was boosted. They both ended up blowing coolant out of the overflow. Both cars had stretch bolts and we replaced both of them with GM MLS gaskets and ARP head studs 6 point.
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Old Sep 11, 2005 | 03:21 AM
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Blown headgasket will do it all day long, blown water out the overflow.
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Old Sep 11, 2005 | 03:38 PM
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Right now my combo is ARP studs with .058 Cometics and 9:1 compression. It was tuned at 14 psi. and made pretty good numbers, but I don't have any type of an intercooler or meth.

The first pass down the track it nosed off about 3/4 track and there is sprayed coolant all over the engine compartment.
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Old Sep 11, 2005 | 03:58 PM
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You have a blown head gasket , no doubt about it. You have to cool the air going into the engine. How much timing?
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Old Sep 12, 2005 | 12:27 AM
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what kind of dyno numbers? yeah blown head gasket why not do a meth kit kit?
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Old Sep 12, 2005 | 12:53 AM
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definitely a blown headgasket if not 2. Mine was doing the same when both of mine were toast.
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Old Sep 12, 2005 | 11:35 AM
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It put down 501/500. And a meth kit is in work, just not completed yet.
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Old Sep 12, 2005 | 01:49 PM
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a little low on 14psi. this is with a turbo setup right? is that on a mustang dyno? i would say the gaskets are blown. thats a lot of boost on a stock bottom end.
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Old Sep 12, 2005 | 01:50 PM
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Thanks for the input guys.

But, what exactly about a Cometic Head gasket "blows" out?
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Old Sep 12, 2005 | 03:58 PM
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You can actually have the layers separate and not properly reseal at cool down. A retorque of the head studs will buy time when this happens but they're going to go eventually.

Rick
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Old Sep 12, 2005 | 04:01 PM
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14psi did you see any detonation? Detonation is a good way to lift it up real quick. Bingo 14psi coolant system
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