Inside the throttle body

[GTamas]

I had a look inside the TB tonight and I was surprised to see this behind the flaps:


First I was shocked to think it is metal dust, but it is soft greasy thing. I know you should not clean the TB bore because of some special coating.

Have you seen such stuff? What is that and what should I do with it? Leave alone, or clean it somehow?

 

[ttocs]

is the entire intake from the butterfly valve back black? I have not looked at a stock intake for some time but I don't remember them being like that.

 

[GTamas]

is the entire intake from the butterfly valve back black? I have not looked at a stock intake for some time but I don't remember them being like that.

as far as I see it is black

 

[Mustang5L5]

Likely from the EGR. Is it stuck open?

 

[ttocs]

I was waiting for one of the pro's to comment as the last time I looked inside of stock intake was about 10 years ago when I ported the front from 70-75mm, and can't remember what I had for lunch yesterday. I can understand a rough texture from how it was cast but I do not remember the black layer.

 

[RAU03MACH]

Little bits of oil and dirt or grit

 

[RAU03MACH]

Coming from your oil line from valve cover

 

[96blak54]

Might be aluminium oxidation growth bits. If the car has sat for awhile, itll do this

 

[RAU03MACH]

That is strange

 

[96blak54]

As I have never seen oxidation grow from aluminium that size before, but id thought i throw that out there

 

[GTamas]

It is soft, greasy to the touch. Reading your comments I think it might be mostly caked oil-mist from the PCV, accumulated over the past 30 years. Intake was never opened or cleaned before.
Even those silvery bits are soft and greasy. I just wonder why they have different colour and structure.

 

[RAU03MACH]

Oil slightly coated with dust

 

[GTamas]

I think I will leave it like that for now. Over the winter I plan to replace the intake to a cobra one.