July 27, 200916 yr 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?
July 28, 200916 yr Author 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.
July 29, 200916 yr 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"?
July 29, 200916 yr I can't see any restrictions in the FPM's ... I don't have a lot of time to research right now,sorry.
July 29, 200916 yr 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.
July 29, 200916 yr 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
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