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Help with 1982 Johnson 15 HP - water in bottom cylinder
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<blockquote data-quote="Sinkingfast" data-source="post: 438186" data-attributes="member: 15306"><p>Sometimes economics dictate technical decisions. I was not insinuating there was anything wrong with the head or the settings that have been in use for many years. 4 fasteners is the norm in higher performance motors in that area instead of 2. Granted I have only mic'ed 4 of these head gaskets and all were thicker in the middle. As long as the job gets done I guess 2 are fine. I don't see the issue with optimizing though..</p><p></p><p>When you pull the head the problem will be evident. For me surface finish is important at the gaskets fire ring area on the head and block. I betcha the leak is at the block..its harder to get clean and flat so forth. When I had my motor apart I ran the head interface of the block over a surface plate with body paper to flatten this area.</p></blockquote><p></p>
[QUOTE="Sinkingfast, post: 438186, member: 15306"] Sometimes economics dictate technical decisions. I was not insinuating there was anything wrong with the head or the settings that have been in use for many years. 4 fasteners is the norm in higher performance motors in that area instead of 2. Granted I have only mic'ed 4 of these head gaskets and all were thicker in the middle. As long as the job gets done I guess 2 are fine. I don't see the issue with optimizing though.. When you pull the head the problem will be evident. For me surface finish is important at the gaskets fire ring area on the head and block. I betcha the leak is at the block..its harder to get clean and flat so forth. When I had my motor apart I ran the head interface of the block over a surface plate with body paper to flatten this area. [/QUOTE]
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Help with 1982 Johnson 15 HP - water in bottom cylinder
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