oil in exhaust manifold

[starscream5000]

Yes, a composite gasket is going to be much more forgiving to an uneven head/block. Just as Ian said, keep the boost to a minimum to get you by.

BTW, I NEVER post "bhg" unless I mean it, it wasn't a joke .

 

[sneakypete]

i know.... i trust both of your opinions with respect. this is what my plan is for now. ill let you guys know how it goes. thanks for your help
-pete

 

[sneakypete]

yea well i finally pulled the head. thought it was a stuck valve. was looking at the valves and they all seem fine. but i did find this.

 

[sneakypete]

how the hell do you chip a piston? how could one guy have so much bad luck?

 

[starscream5000]

Damn, did you clean it as well? Or was it steam cleaned?

How's the head look for that cylinder?

Find the other part of the broken piston?

 

[sneakypete]

Damn, did you clean it as well? Or was it steam cleaned?

How's the head look for that cylinder?

Find the other part of the broken piston?

Did i clean what? the piston head?

actually the valves and combustion chamber for that cylinder are for the most part clean and shiney... i guess all that unburnt fuel cleaned it up good.

i cant find it anywhere... its too big to fit past the valves. and if it did, it didnt damage the blades on the turbo.

i guess im not waiting for the summer to build my new motor.

 

[starscream5000]

It's probably in the oil pan or worked it's way into the bearings if it was somehow sheared up, but I doubt that.

 

[sneakypete]

its a pretty big chunk... i dont see how it can get down there. but i guess there is no other explanation.

 

[jdub]

I donno...it looks kinda torched to me.

 

[sneakypete]

I donno...it looks kinda torched to me.

what do you mean torched?

 

[jdub]

Hard to say from a pic, but the edge looks round and pitted...i.e it went lean and melted the piston.

 

[Poodles]

yep, looks like a classic melted piston...

 

[sneakypete]

so thats what that is. ive never run lean before. only pig rich.

 

[jdub]

If an injector cuts out on ya...it will go lean. Really fast and it can happen on a single cylinder too

 

[sneakypete]

i see...

 

[jdub]

Might want to have your injectors cleaned & flow tested anyway...I would pay particular attention to #3

 

[sneakypete]

there was also some scarring on the bore of that same cylinder. its perfectly lined up with the piece missing.
i was planning on waiting till the summer to get the injectors cleaned and flow tested, but since im gonna build the new motor now, i will send them out this week. or im also trying to find a trade for 650cc injectors now that i can raise the boost.

 

[sneakypete]

since there is scarring on the block in car, should i use the spare block or the block in the car? the block thats in the car is pretty new and clean, but the spare block isnt fucked up. it shouldnt matter since my new pistons are oversized tho right?
thanks for the input
-pete

 

[jdub]

That depends on how deep the cylinder wall scarring is and the oversize of the pistons.

 

[sneakypete]

its not that deep. just a surface scratching. my pistons are .020 over