devilfish

Hi

This winter I decided to take of the heads of my engine, just to se how things looked.
The engine is honed,new forge pistons,total seal plasma rings, build by a engine shop. The engine has only runned for around
3000miles.
I hade som probleme to tune the car due to 2 faulty injectors, so the engine has runned lean on some cylinders and rich on some others.
Well what I saw whas burned oil on the pistons and some on the intake vavles.
Perhaps this i normal during break-in of the rings, i dunno?
I have not noticed that the car "eats" alot of oil, and it doesnt smoke much.
The parts of the pistons that I have circled is som kind of oil-goo that i can scrap of with my finger nail.
The heads where brand new TS heads with new vavles and vavle steams.

Here are the pics. Let me know what you think.

devilfish

pic2..

devilfish

pic3

devilfish

pic4

devilfish

Perhaps its "normal" i dunno. I just whant to check with your more experince guys,,

Dialed_In

iTrader: (3)

Did you do a leakdown test before you pulled the heads? The pictures are somewhat vague, but judging by some of the cylinders in the pics it looks like your rings haven't sealed fully. The "oily goo" could be oil, through the valve seals or blowby, or it could be fuel buildup. A leakdown test would have told you which. The charge distribution could be the cause of the goo, the carbon trails on the tops of those pistons doesn't look too good. It should be nice and even.

devilfish

Thanks for the answer.

I did not do a leakdown test, thats the next plan.
At the first start up I got som smoke coming out of the pcv vavle hole on the driver side vavlecover. I heard that is "normal" before the rings have sealed?
I have now looked at my old stock piston that I took out of the engine. They also got some of these "goo" on them. But not as much.
Could you explain more about the carbon trails on the tops of those pistons ? I dont follow you there.

Thanks

ljnowell

That much carbon buildup is normal. It happens to every engine. What is odd is the one that is almost clean. You werent noticing any white smoke, at any times were you?

Dialed_In

iTrader: (3)

The carbon buildup is normal, but the distribution of it on the crown of the piston isn't. It should be nice and even. The way the carbon is built up can be read just like a spark plug to tell you how the flame is moving in the chamber during combustion.

devilfish

Ok good to hear.

The one that is almost clean is the one I cleand my self, as i write in the picture.