Help identify 243 head port work

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Dec 27, 2014 | 08:47 AM

slonoma

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From: Roch Ny

Help identify 243 head port work

A friend had these heads and said there was some bowl blending work done on these. Excuse my newbness, but can any one help me verify this? I can see some machine marks, but they look like they may be from replacing the valve seats. There is a slight lip on the back side of the seat, it's not sharp, but I can feel it with my finger. Thanks.

Dec 27, 2014 | 04:59 PM

JRENIGAR

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No work done on them that I can see.

Dec 27, 2014 | 05:51 PM

omc8

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Can you post some more pics and take some measurements inside the throat . There appears to be some work done but not much to get excited about .

Dec 27, 2014 | 08:06 PM

slonoma

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From: Roch Ny

Quote:

Originally Posted by omc8

Can you post some more pics and take some measurements inside the throat . There appears to be some work done but not much to get excited about .

1.740"

Dec 30, 2014 | 10:36 PM

LilJayV10

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My guess is it's had new seats put in it. Those look like tooling marks not port work. Just my .02

Dec 31, 2014 | 10:44 AM

jimmyblue

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I can't see someone having a die grinder in hand and
not even touching the valve guide bosses. And if you
feel a ridge on the back of the valve seat inserts,
ditto.

When I did mine there was plenty of evidence.

If they were "ported" at all, it wasn't enough to be
visible.