View Full Version : Pics head gasket remplace

05-27-2005, 01:50 PM
I just wanted to post some pics of the condition of the piston and head valves in my engine. Whats up with all that black staff is it carbon and why there is like a white color in the center of the piston?
comens welcome.
sorry but I dont know how to add images so just copy and past the link to my yahoo
enjoy browsing. http://forums.freshalloy.com/images/graemlins/grin.gif

05-27-2005, 03:01 PM
That's not uncommon with a blown headgasket. The black stuff is carbon buildup, pretty normal. The white is probably residue from coolant when the headgasket blew. The steam from the coolant probably started cleaning the carbon off, that's why it's flaking up like that. Rotate the engine so that piston is at TDC and you can clean it off with a wire brush or something similar without touch the cylinder walls. Once your done cleaning them all up, poor a little oil into each cylinder and turn the engine over by hand. As each piston comes up and goes back down, the oil will cause any residual particles to stick to the walls at the top, wipe it clean with a rag. Continue until there is not more solid particles. Oil residue is fine, you don't have to clean that out.

05-27-2005, 08:51 PM
thank you bro.
Ill go ahead and follow your advise,and polish the dome of the piston and head too. I was told this would reduce the accumulation of carbon.
I was thinking on porting the head, intake and exhaust manyfolds with a dreamel any advise?
i was thiking on grinding off the portion of the valve guides that stick out would this be ok or dont even think about it. http://forums.freshalloy.com/images/graemlins/grin.gif

05-27-2005, 08:57 PM
s15 slugs come with some kind of coating from the factory.
they put it there for a reason.

05-28-2005, 01:31 AM
s15 slugs come with some kind of coating from the factory.
they put it there for a reason.

slugs? you mean pistons righ?

05-28-2005, 08:28 PM

Yes, that's what he means. 'Slugs' is an old term used by racers. Now you have a new word to add to your vocabulary.