Crack or casting marks?

Grignapoco Posts : 115 Join date : 2017-09-20 Age : 47

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 image.]

My bike is stock, except for rollers, and has 6500 km.

Guest

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

My vote casting mark.

GRiSO Capo Posts : 10555 Join date : 2013-05-29 Age : 67

STOP LOOKING FOR PROBLEMS!!!

Very Happy

Biondino Posts : 214 Join date : 2013-11-22 Age : 52

the is a cooling oil passage right behind the Ridge

if it crack through, you will know it Very Happy

[You must be registered and logged in to see this image.]

Grignapoco Posts : 115 Join date : 2017-09-20 Age : 47

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.

Grignapoco Posts : 115 Join date : 2017-09-20 Age : 47

Pete Roper wrote:: STOP LOOKING FOR PROBLEMS!!!

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!

GRiSO Capo Posts : 1657 Join date : 2014-09-22

^^^^^^^that is the right thing to do ^^^^^^^^^

Fra Cristoforo Posts : 791 Join date : 2016-04-14

Hell, I would have picked at it, looks like build-up that has flaked off not a crack.

GRiSO Capo Posts : 826 Join date : 2014-10-07 Age : 70

Definitely cracked. The bike is scrap. Send it to me. Laughing

GRiSO Capo Posts : 1785 Join date : 2015-02-02 Age : 63

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

GRiSO Capo Posts : 826 Join date : 2014-10-07 Age : 70

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

shhhh

Grignapoco Posts : 115 Join date : 2017-09-20 Age : 47

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 image.]

GRiSO Capo Posts : 956 Join date : 2014-06-05

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

» ahhh... admitting one's mistakes... stripped thread in casting