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Old 11-12-2008, 09:58 AM   #1
Scooby Newbie
Member#: 158488
Join Date: Sep 2007
Chapter/Region: MWSOC
Location: Petoskey, MI
2007 Impreza 2.5i
Urban Grey Metallic

Default Head Gasket Failure

So, I know there have been countless threads about this already but I can't seem to find the answer I am looking for. My car just had the head gaskets replaced under warranty (2007 2.5i), but why do subaru's seem to always have problems with head gaskets? Is it a design/engineering problem? Cheap parts?

None the less, I am thankful they found out what was wrong with my car and it was covered under warranty. This is the third time my car has been in the shop for overheating and they finally got it diagnosed correctly.

Thanks in advance for your info.
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westy4990 is offline   Reply With Quote
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Old 11-12-2008, 10:12 AM   #2
Scooby Specialist
Member#: 1853
Join Date: Jul 2000
Chapter/Region: TXIC
Location: SA-TX (Hozer expat)
GC6 Supercharged


Wow.. I didn't realize that the 2007 model also had HG issues! I thought it was a problem with the older EJ25? My understanding of the issue was a design flaw in the gasket itself. But, I was also under the impression that Subaru had found and fixed this flaw in there replacement head gaskets? I sure hope that's the case since I just replaced mine last year with an OEM one.

I wonder if the issue with your engine was specific to your vehicle? Or is it the continued subaru HG issue?
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Old 11-12-2008, 10:37 AM   #3
Scooby Specialist
Member#: 141040
Join Date: Feb 2007
Chapter/Region: BAIC
Location: Designing things
07 2.5i wagon


Sounds like a fluke to me. I also thought they'd fixed the gasket issue.

Besides, the standard head gasket failure was at ~80k miles. My '02 went pop at 84k.
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Old 11-12-2008, 07:15 PM   #4
Scooby Specialist
Member#: 155358
Join Date: Jul 2007
Location: Coon Rapids, MN
2008 Forester
Steel Silver


Originally Posted by westy4990 View Post
....... but why do subaru's seem to always have problems with head gaskets? Is it a design/engineering problem? Cheap parts

Open deck block design, it allows for a lot of distortion and movement at the head gasket mating surface. The more movement, the more wear and tear on the head gasket = more failures.

This is not just a subaru thing any engine with a open deck block will more then likely have a higher rate of HG failures then the same type of engine in a semi closed deck or closed deck block configuration.
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Old 11-12-2008, 08:14 PM   #5
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Member#: 97251
Join Date: Sep 2005
Chapter/Region: NESIC
Location: Farmington, NH
'13 Impreza 2.0i


I just had mine replaced on my 06 just under 60k.
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