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914World.com _ 914World Garage _ Head Flycut problem ?

Posted by: pgollender Nov 14 2017, 07:24 PM

Got my heads back from machine shop and noticed these 4 defects in the outer jug seat:
Attached Image

Additionally there is a chip missing near the spark plug hole. The other head is perfect.
What can I do to fix it ?
Weld and regrind ?

Posted by: porschetub Nov 14 2017, 07:34 PM

QUOTE(pgollender @ Nov 15 2017, 02:24 PM)

Got my heads back from machine shop and noticed these 4 defects in the outer jug seat:
Attached Image

Additionally there is a chip missing near the spark plug hole. The other head is perfect.
What can I do to fix it ?
Weld and regrind ?

all good don't worry you are fine

,those marks have no effect on your rebuild ok.

Posted by: worn Nov 14 2017, 08:30 PM

QUOTE(pgollender @ Nov 14 2017, 05:24 PM)

Got my heads back from machine shop and noticed these 4 defects in the outer jug seat:
Attached Image

Additionally there is a chip missing near the spark plug hole. The other head is perfect.
What can I do to fix it ?
Weld and regrind ?

I don’t think that is a defect in the sealing surface. But it has been a few years since I did mine.

Posted by: jd74914 Nov 14 2017, 10:45 PM

I would smooth out the chip in the chamber so you don't get a hot spot there. No need to reweld/machine IMHO. I'm a little surprised the shop didn't do that little bit of smoothing though.

Posted by: McMark Nov 15 2017, 12:25 PM

No sealing on that surface. That material was removed so it wouldn't hit the cylinder fins.