Kostamojen Posted July 27, 2009 Share Posted July 27, 2009 So i've got a set of "new" Subaru OEM headgaskets for fat-case EA71's and I just noticed something... It doesn't have holes for the coolant passages on the sides of the heads/block. What gives? Quote Link to comment Share on other sites More sharing options...
Kostamojen Posted July 28, 2009 Author Share Posted July 28, 2009 Nobody? Should I take some pics to show what I mean? My other, non-fat case EA71 that I had in my '78 wagon had headgaskets that DID NOT block those coolant passages, so i'm not sure what should be done about this. Quote Link to comment Share on other sites More sharing options...
RenaissanceMan Posted July 29, 2009 Share Posted July 29, 2009 looking at a felpro fat-case gasket.. I recall ea81 gaskets also had some of the passages restricted/blocked. My guess is that is has to do with restricting the flow so it circulates in the block & heads in a specific pattern to maximize heat absorption. the early ea71s did have problems with grenading pistons, perhaps this was a solution to these "hot spots"? Quote Link to comment Share on other sites More sharing options...
Kostamojen Posted July 29, 2009 Author Share Posted July 29, 2009 That would be a strange solution to such an issue... Quote Link to comment Share on other sites More sharing options...
moosens Posted July 29, 2009 Share Posted July 29, 2009 I can't see any restrictions in the FPM's ... I don't have a lot of time to research right now,sorry. Quote Link to comment Share on other sites More sharing options...
bheinen74 Posted July 29, 2009 Share Posted July 29, 2009 looking at a felpro fat-case gasket.. I recall ea81 gaskets also had some of the passages restricted/blocked. My guess is that is has to do with restricting the flow so it circulates in the block & heads in a specific pattern to maximize heat absorption. the early ea71s did have problems with grenading pistons, perhaps this was a solution to these "hot spots"? there's a certain board member here who grenaded the #4 on a 78 Brat. Quote Link to comment Share on other sites More sharing options...
RenaissanceMan Posted July 29, 2009 Share Posted July 29, 2009 there's a certain board member here who grenaded the #4 on a 78 Brat. I've had two self-destructed ea71s in the past from pistons giving up. Such is life Quote Link to comment Share on other sites More sharing options...
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