Engine Case Half Pitting

Louavul

Well Known Member

• Apr 17, 2016

• #1

Anyone seen anything like this before? Right side O-360 engine case half pitting where the cylinder base interfaces with the flange on the engine case. Will be calling ECI in the morning to get their take on it.

 

BillL

Well Known Member

• Apr 17, 2016

• #2

That looks more like casting porosity to me. Has that surface been machined beyond factory original?

Typically, this is considered as part of the material strengths for a cast part so it should not add any concern about material fatigue strength. A more specific answer would be in order from an expert that will be standing behind their work.

 

T

tim2542

Well Known Member

• Apr 17, 2016

• #3

That's not wear or fretting and machine marks are still present, so those imperfections were there last time it was machined, I think your fine.
I'd guess those were inclusions or gas bubbles in the casting.
Tim Andres

 

rzbill

Well Known Member

• Apr 18, 2016

• #4

+3 on hydrogen gas porosity generated during casting. I would talk to the vendor about it.

 

Bob Kuykendall

Well Known Member

• Apr 18, 2016

• #5

If you're really worried, I can Photoshop that out for for you, no problem.

Thanks, Bob K.

 

P

PCHunt

Well Known Member

Sponsor

• Apr 18, 2016

• #6

Bob Kuykendall said:

If you're really worried, I can Photoshop that out for for you, no problem.

Thanks, Bob K.

Click to expand...

I got a good belly-laugh out of that one!

 

Louavul

Well Known Member

• Apr 19, 2016

• #7

Pitting?

To close the loop on my question, Engineering at ECI/Continental Motors states the following;

?Porosity in casting. Cosmetic, should not affect torque or hold down.?

So, just as those that offered opinions suggested. I just needed to be sure it didn't have a Swiss cheese syndrome.

Many Thanks

 

Weasel

Well Known Member

• Apr 19, 2016

• #8

its junk. Hey I will take it off your hands so you wont need to worry about it.