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I have been told by 2 different machine shops that a hairline crack in the =
valve seat between intake and exhaust is not a big deal. They both referenc=
ed the iron head stock car racers that do it all the time. This is on two G=
T6 circle B heads I had magnafluxed. I was a little surprised to hear that =
and just as surprised to hear the same from a second machine shop. Both of =
these shops do a lot of work on circle track stuff. One I know also does a =
lot of drag race motors. Both also noted that it is questionable if I was t=
rying to get 100K miles on a road going car but for racing not to worry abo=
ut it. Check it anytime the head is off. the cracks are in line with a cast=
ing line in the valve pocket/port.=C2=A0
Thoughts on that?
=C2=A0I also have an "A" cast head that is not cracked. The B head is suppo=
sedly better. I know this came up a couple of months ago but I don't rememb=
er the differences between the A head and =C2=A0the B head.
Thanks, BrianFoster, RI
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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, =
sans-serif;font-size:16px"><div id=3D"yui_3_16_0_1_1455913856463_3874" dir=
=3D"ltr">I have been told by 2 different machine shops that a hairline crac=
k in the valve seat between intake and exhaust is not a big deal. They both=
referenced the iron head stock car racers that do it all the time. This is=
on two GT6 circle B heads I had magnafluxed. I was a little surprised to h=
ear that and just as surprised to hear the same from a second machine shop.=
Both of these shops do a lot of work on circle track stuff. One I know als=
o does a lot of drag race motors. Both also noted that it is questionable i=
f I was trying to get 100K miles on a road going car but for racing not to =
worry about it. Check it anytime the head is off. the cracks are in line wi=
th a casting line in the valve pocket/port. </div><div id=3D"yui_3_16_=
0_1_1455913856463_3874" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_14559=
13856463_3874" dir=3D"ltr">Thoughts on that?</div><div id=3D"yui_3_16_0_1_1=
455913856463_3874" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_1455913856=
463_3874" dir=3D"ltr"> I also have an "A" cast head that is not cracke=
d. The B head is supposedly better. I know this came up a couple of months =
ago but I don't remember the differences between the A head and the B=
head.</div><div id=3D"yui_3_16_0_1_1455913856463_3874" dir=3D"ltr"><br></d=
iv><div id=3D"yui_3_16_0_1_1455913856463_3874" dir=3D"ltr">Thanks, Brian</d=
iv><div id=3D"yui_3_16_0_1_1455913856463_3874" dir=3D"ltr">Foster, RI</div>=
<div id=3D"yui_3_16_0_1_1455913856463_3874" dir=3D"ltr"><br></div></div></b=
ody></html>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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