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 Crack or casting marks?

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nblades
Tanabuso
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PostSubject: Crack or casting marks?   Sat Dec 09, 2017 7:33 pm

I recently took my headers off to polish them, and noticed this line in the head that looks a bit like a crack. It could be just a mark from production cast molds. I hope it is. Anyone seen these lines before. Look close at the divider between the two exhaust valves in my picture and you'll see the line. Both heads are the same.[You must be registered and logged in to see this link.]
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My bike is stock, except for rollers, and has 6500 km.
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ghezzi
Fra Cristoforo
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PostSubject: Re: Crack or casting marks?   Sat Dec 09, 2017 11:39 pm

Are they left and right heads, looks like 2 posts of the same photo?

My vote casting mark.
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Pete Roper
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PostSubject: Re: Crack or casting marks?   Sat Dec 09, 2017 11:47 pm

STOP LOOKING FOR PROBLEMS!!!

Very Happy
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Phang
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 12:22 am

the is a cooling oil passage right behind the Ridge

if it crack through, you will know it Very Happy

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nblades
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 6:02 am

ghezzi wrote:
Are they left and right heads, looks like 2 posts of the same photo?

My vote casting mark.

Not sure why I posted two of the same photo? But the left and right look the same. Probably nothing to worry about. Most likely just casting marks.
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nblades
Tanabuso
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 6:04 am

Pete Roper wrote:
STOP LOOKING FOR PROBLEMS!!!

Very Happy

Can't help myself, I'm trained to look for issues on aircraft all day. I'm gonna bolt up those headers and just ride!
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sidrat
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 7:54 am

^^^^^^^that is the right thing to do ^^^^^^^^^
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GuzziSteve
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 8:39 am

Hell, I would have picked at it, looks like build-up that has flaked off not a crack.
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Papa Lazarou
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 9:14 am

Definitely cracked. The bike is scrap. Send it to me. Laughing
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waterbottle
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 11:19 am

It's a casting line, Both heads are the same. It wont crack there either, I've tried Laughing
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Papa Lazarou
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 12:05 pm

waterbottle wrote:
It's a casting line, Both heads are the same. It wont crack there either, I've tried Laughing  

shhhh
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nblades
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PostSubject: Re: Crack or casting marks?   Sun Dec 10, 2017 2:42 pm

Here's the reason I was poking around in the exhaust area of the heads. The one header is done and ready for install. The other still needs to be polished. I'm using an orbital sander with a piece of super fine scotchbrite pad, and a product called Blue Job.[You must be registered and logged in to see this link.]
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LBC Tenni
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PostSubject: Re: Crack or casting marks?   Mon Dec 11, 2017 4:11 pm

Nice shine Blades! Mine could use that treatment, but I'm too lazy, so I'm running with the "warmth" of patina.
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