2.5L Boxster motor with slipped sleeve

[rick-l]

Originally Posted by Justin@Athens

Because I am a curious sort of fellow, and apparently not that bright either--I decided to take it apart.

Me too. I love taking things apart, seeing how they work and minor failure analysis. Putting it back together never seems to happen with me either.

[Justin@Athens]

Originally Posted by speeder

Please educate the rest of us; what looks nasty about them? I see nothing wrong in the pictures. They have some weird reflections from the screwdrivers behind them in the photo, that's about it. They look perfectly fine.

Look at them closely on the edges that face the camera. Its hard to photograph, but they are definitely chipped/scored in an odd way. On the other half of the case the edges are perfectly smooth.

DAMAGED?


UNDAMAGED?

[Justin@Athens]

Here are some photos of the camshafts as I mentioned before, I find these marks unusual--however they could be present from manufacturing.

Look in between the lobes--the markings extend the length of both shafts.

[TimT]

Are you talking about the marks left from when the flash was ground away from the casting?

Nothing at all odd about them..

[TimT]

You can see the parting line projecting vertically to the top of the cam lobe...

Nothing odd....just some crude finish work on a casting..

[Justin@Athens]

@TimT,

Yep, thats what I was looking at. It looked just enough out of place for me to ask about--thanks for clearing that up. I thought that it might be from the factory that way.

[rick-l]

I see what is wrong. Someone drilled big holes in the cylynder walls.

Originally Posted by Justin@Athens

DAMAGED?

[Schumi]

The 'Damage; you are referring to a the top of the cylinders is, I believe, remnants of head gasket material. It flakes off.