blown head

[dieselsmoke]

update

I got a new cylinder head ( had to reuse my camshaft and lifters)  made sure the piston wasnt damaged on the sides and cleaned up the top of the piston. I put it all back together and fired it up. For the first little bit it runs really rough and smokes like crazy. Once it warms up it runs fine. I checked the timing and it is set at .91 ( I have a giles performance pump and rebuilt injectors from him) I figured I would advance the timing to .97 since I have read that alot of people like to run the pumps at .95-1.0 but that didn't make a difference. Anyone have any ideas as to why it would run rough and smoke like crazy when cold but when it warms up it is fine? It almost seems like it has a miss in the engine until it warms up. The smoke looks like a whiteish grey i believe. Is it possible that the lifters need to settle in after being pulled and re-seated into the new head??

[jasonsansfleece]

Sounds like an injector to me. Whiteish grey smoke sugests unburnt fuel.
Start it up cold, crack open each injection line/injector union in turn.
If one of the injectors is not working properly there will be no change in the way the motor is running when that union is cracked.
If cracking every union does not effect the running then you can at least rule out the injectors

[dieselsmoke]

no. I did not pull the piston as just the top of the piston got a little banged up from the piece of the precup that fell ontop of it. I checked the walls and they are fine. This engine was rebuilt 10,000 km ago with new oversized pistons and rings.

I will try the injectors and see what happens. the injectors are new from giles with 10,000km on them. It just seems weird that it has a miss and smokes like crazy then as it warms up it goes away.

[dieselsmoke]

i will check the injector this weekend. is there anything special I need to do to check them besides cracking the nut on the top of the injector while the car is running.

[Powered by Spearco]

I'll test them for the $200 you ripped me off for! 

[dieselsmoke]

so i checked the injectors and found that when i cracked the fuel line to #4 it made no difference. i swapped injector 3 and 4 around to see if that would help and it made no difference. looks like the piston itself may have an issue. is there a vendor on here that sells oversized pistons for the aaz engine?

[R.O.R-2.0]

so i checked the injectors and found that when i cracked the fuel line to #4 it made no difference. i swapped injector 3 and 4 around to see if that would help and it made no difference. looks like the piston itself may have an issue. is there a vendor on here that sells oversized pistons for the aaz engine?

or else it has a bent valve, or a badly blown head gasket..

those are the culprits i would be looking at, not pistons.

(might just be some bad karma tho)

[dieselsmoke]

i have a new head and head gasket I put on so it won't be that. I'll have to pull the head again. Shouldnt take as long now that I have already done it once.

[Powered by Spearco]

Maybe if you didn't get HHHHHHHIIIIIIIIIIGGGGGGGGGGGGHHHHHHHHHHHH before you work on it or make any deals on here, you'ld have it figured out the first time.

But seriously, its probably a bad transmission. 

[R.O.R-2.0]

Maybe if you didn't get HHHHHHHIIIIIIIIIIGGGGGGGGGGGGHHHHHHHHHHHH before you work on it or make any deals on here, you'ld have it figured out the first time.

But seriously, its probably a bad transmission. 

ROTFLMFAO!!! 

[dieselsmoke]

changed piston out and all seems good now. Thanks for all the help.

[Powered by Spearco]

Wow, just over six hours sence your last post and you changed out the one bad piston and its fixed now!
Hows the compression ballance between the other cylinders, piston to cylider wall clearance, piston wrist pin clearance and such? Post up a video?

[R.O.R-2.0]

well Josh, you successfully scared him away!