Heavy soot on pistons

[the wrath]

I have a question I have a 84 Riviera engine that had a bad turbo on it and I took the heads off and all 6 pistons were full of soot. I'm used to the intercooled cars. When a turbo goes bad is this what happens?

Crazy part is the hole that the turbo goes into didnt have any oil in it.

 

[the wrath]

Some pics I was trying to clean off pistons with kerosene that's why it looks wet.

 

[TTA308]

That looks like it was under water?

 

[the wrath]

Actually it wasnt. I took the heads off and there was heavy soot on the pistons so I was trying to clean them. Hotairs dump oil on the pistons when turbo bad.

 

[WarWagon]

Probably just the nature of the engine and a stock cam on gasoline. When I had to replace the KB Xb1 cam and cut the heads on the 3.8 in my Impulse, that engine had a bunch of carbon on the pistons, it was .030 over 9.25:1 compression and ran really good.

 

[the wrath]

I took the egr valve off and it was plugged with carbon. Would that do this?

 

[WarWagon]

Could be but that seems to only heat up and clog the intake manifold.