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Could This Be A Hardened Seat?


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#1 1314cc

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Posted 10 June 2019 - 04:51 PM

Thought my head was probably leaded but just been cleaning up and this line was revealed. It runs evenly around. Apart from a hardened seat could it be some mark left from machining?? I haven't been able to clean up the other exhaust seats as much and so far there's nothing as clear to see. Appreciate any thoughts!

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#2 Turbo Phil

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Posted 10 June 2019 - 05:42 PM

From what I can make out in the picture I’d say there’s a good chance that’s a hardened insert.

Phil.

#3 1314cc

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Posted 11 June 2019 - 08:33 PM

I've read somewhere that you shouldn't be able to scribe a mark on a hardened seat?




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