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Inlet Port casting mark or crack

SR2mx518
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Joined: Tue Oct 25, 2016 9:42 am

Inlet Port casting mark or crack

Postby SR2mx518 » Tue Oct 25, 2016 10:22 am

Hello everyone,
New here and building a Road Runner Racing SR2 using our donor vehicle of a 1995 Eunos 1.8.
The head/engine has not yet been dismantled for refurbishment, but,
I have discovered in the inlet ports on the head there is what looks like a crack but it could be a casting mark. This mark is across the narrow bridge between the 2 inlet valves on all for ports. Hopefully it is a casting mark but it looks too much like a crack.
So can anyone confirm it as a casting mark meaning it will be OK for me to polish the ports and not have to be concerned about that bridge being weak or whatever.
or
if it is a crack, is it repairable by a local machine shop.
When rebuilt it will be fitted with a Jenvey Throttle Body set.
All the pictures I have found on the web seem to have the same marks.
Anybody confirm please
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Mazda Mender
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Re: Inlet Port casting mark or crack

Postby Mazda Mender » Thu Oct 27, 2016 7:20 pm

Can you post a pic .
M-m
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SR2mx518
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Joined: Tue Oct 25, 2016 9:42 am

Re: Inlet Port casting mark or crack

Postby SR2mx518 » Mon Oct 31, 2016 1:21 am

20161022_port1.jpg
20161022_port1.jpg (371.24 KiB) Viewed 2582 times
The mark can be seen across the bridge between the two valves.
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Lazza
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Re: Inlet Port casting mark or crack

Postby Lazza » Mon Oct 31, 2016 3:26 pm

Looks like a casting mark to me. It matches the casting marks that can clearly be seen on the sides of the port.
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davew
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Re: Inlet Port casting mark or crack

Postby davew » Tue Nov 01, 2016 12:29 am

casting mark.

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