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Old 04-17-2013, 10:17 AM   #1
Adam_K
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Default 2006 WRX Built motor Blown head gasket?

Just trying to get some possible ideas on what exactly happened. I was driving this weekend doing some pulls on the highway with a few friends in a few different cars. The last pull I did I was driving and started going into boost and all of a sudden the top and bottom radiator hoses blew off and sprayed coolant eveywhere. I was able to get off the side of the road immediately and shut the car down for fear of overheating in which I didn't overheat. After getting the hoses back on the radiator and filling the car back with coolant and water I was able to baby the car back home. As soon as I got close to my house coolant started dumping out of the exhuast and lost all coolant as I was pulling into my driveway. As of yesterday I had the car flat-bedded back down to my friends at Moore Performance to start to look into what went wrong. I checked the oil and there is absolutely zero collant in the oil. First thought that ran threw my head was blown head gasket, but after further thought, is it possible to have blown a seal in the turbo? Any thoughts or suggestions?
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Old 04-17-2013, 06:48 PM   #2
Eww Evo
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I had something similar happen to me at the track, my upper radiator hose hit my fan and sprayed my distilled water all over my motor, we got it running when we pulled it with my friends truck and a #hit load of distilled water shot out from the exhaust etc....

I don't know the exact damage that was caused, i'm in the process of pulling the motor out to find out. One of two things could of happened that you and I could be in the same situation - very bad broken Head Gasket or a broken sleeve and you will need to change out the Short block.

Pull the motor out to see the damaged and Good luck!

Last edited by Eww Evo; 04-17-2013 at 06:59 PM.
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Old 04-17-2013, 06:52 PM   #3
WRXSteye20008
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Or before doing any of that, get a leak down test and that will show you where the issue is.
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Old 04-17-2013, 08:24 PM   #4
Adam_K
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Definitely going to do a leak down and compression test before the motor gets pulled. I'm hoping your situation turns out okay. I didn't hear any crazy noises coming from the motor so i'm hoping that rules out a hole in the block. I was only pushing 24psi on a brand new built bottom end that has 5k miles on it.
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Old 04-17-2013, 11:28 PM   #5
Eww Evo
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I wasn't hearing any noises either, hopefully just a headgasket.

Please let me know what you find out when you do the down leak / compression test, very interested to know! I'll post pictures when the motor get's taken apart this week.
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Old 04-18-2013, 01:04 PM   #6
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Ring-land is unlikely at this point, it would have nothing to do with coolant in the exhaust. Simultaneous double failure is next to impossible.

Cracked block, cracked head or blown head gasket. However factory mls gaskets are very rare and hard to blow which leads me to believe that If the car has been part before its likely an assembly defect where something was overlooked.

To get coolant to the exhaust an opening would have to be quite large, not consistent with a simple head gasket leak.

I am putting my money on a crack.


There is no point in doing a leak-down or even a compression, a waste of time. Coolant in exhasut is all the evidence you need. you already know engine has to come out. Heads must be milled in pairs, and it would be stupid not to do so after such failure, maybe even decking the block, but only measuring will show...

The only question you have left is what condition your rings and pistons are in, but once again neither of those tests will tell you considering at least one cylinder will not hold pressure and thus not reveal ring condition of that cylinder.

PS: If turbo somehow let coolant in to the exhaust it would still not pressure the cooling system to blow your hoses. Edit: Some research confirmed my memory that there are no seals for the turbo coolant jacket. I don't see how turbo can be remotely close to the issue at hand.

Last edited by al_s14; 04-18-2013 at 01:28 PM.
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Old 04-19-2013, 02:48 AM   #7
Uncle Scotty
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how much boost were you running???

havin both rad hoses blow off usualy means bad juju
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Old 04-19-2013, 03:51 PM   #8
Eww Evo
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Quote:
Originally Posted by Uncle Scotty View Post
how much boost were you running???

havin both rad hoses blow off usualy means bad juju
He was pushing 24psi
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Old 04-20-2013, 03:31 AM   #9
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mighta lifted the head a bit
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Old 04-20-2013, 08:09 PM   #10
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i'm going with cracked cylinder #4.
once that upper radiator hose came off..toast..

have seen too many that survived a upper radiator hose incident
with causing other problems..
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Old 04-25-2013, 04:29 PM   #11
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Update?
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Old 04-26-2013, 10:16 AM   #12
Eww Evo
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Not my thread but i'll have my heads apart today and I can give you an idea what you might be looking at since my upper radiator hose popped off at the race track. :P
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Old 04-26-2013, 10:19 PM   #13
Eww Evo
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Heads and block are in great shape, broken HG so happy!
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Old 05-04-2013, 03:30 PM   #14
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It's always a good idea to do a compression test and leak down. Also if you have access to the tool a cooling system pressure test is a great idea. The tool is pretty cheap if you don't have one. Knowledge is power. Get your info, do your research and do some thinking on how all these things mesh together. It's easy to go for the low hanging fruit of a head gasket failure, but I have pulled heads before looking for a head gasket leak only to find the leak was in the intake manifold gasket or the intake itself. Careful consideration should be made before commuting to another rebuild after only 5k miles.
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Old 05-05-2013, 09:08 AM   #15
Adam_K
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So.. I'll post pics when I get home from work, but it appears I had an injector failure that led to a chunk of the block blowing off and destroying the block and the one head. I know for sure the rods are good and three of the four pistons for sure. Crank appears to be good but won't know for sure until my builder gets it to inspect everything. All the working components of the heads are fine (cams, valves, etc..) I had a build up of black crap in one of the manifold runners and the injector that "failed" completely melted the o-ring. I was running DW 1300's tuned on corn. 1-step colder NGK's, running 24psi on a Blouch 20gxt.
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Old 05-30-2013, 06:32 PM   #16
Eww Evo
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Any new updates?
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