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  Topic Review (Newest First)
09-11-2019 06:50 PM
jlang95
Quote:
Originally Posted by Hydro View Post
Quote:
Originally Posted by jlang95 View Post
So update, I pulled the injectors and separated the upper and lower bodies. The fuel spring on the lower body of the injector is broke on 7 of the injectors. And I pulled the turbo and the outlet and the down pipe are covered in thick oily residue.
My guess is that the new orings on the outside of the injectors uncovered an ongoing problem -- the internal body oring was leaking and the pintle springs was busted

The upper external oring since it was new and sealing better pushed the oil that was previously leaking past, and into the crankcase -- down into the fuel rail, and into the combustion

The broken pintle springs were causing the injector tip to have a poor/no spray pattern -- incomplete combustion happened -- the ECU would have basically shut the fuel off to keep engine speed and you were running on engine oil -- so lots of smoke and snot

Those lower springs pre load the injector pintle to about 3900psi -- without them working as they are supposed to, the nozzle just squirts a stream

Seven broken in one engine seems to me to be odd, maybe they were just old
I was surprised there were that many broken as well. But oh well. It’ll be down for a little and then it’ll be back up in running with some new injectors, turbo, intake, and HPOP!
09-11-2019 06:45 PM
Hydro Vid could have been better, but shows the part order of the lower injector assembly

https://www.youtube.com/watch?time_c...&v=6uSCa9_1n4I
09-11-2019 06:33 PM
Hydro
Quote:
Originally Posted by jlang95 View Post
So update, I pulled the injectors and separated the upper and lower bodies. The fuel spring on the lower body of the injector is broke on 7 of the injectors. And I pulled the turbo and the outlet and the down pipe are covered in thick oily residue.
My guess is that the new orings on the outside of the injectors uncovered an ongoing problem -- the internal body oring was leaking and the pintle springs was busted

The upper external oring since it was new and sealing better pushed the oil that was previously leaking past, and into the crankcase -- down into the fuel rail, and into the combustion

The broken pintle springs were causing the injector tip to have a poor/no spray pattern -- incomplete combustion happened -- the ECU would have basically shut the fuel off to keep engine speed and you were running on engine oil -- so lots of smoke and snot

Those lower springs pre load the injector pintle to about 3900psi -- without them working as they are supposed to, the nozzle just squirts a stream

Seven broken in one engine seems to me to be odd, maybe they were just old
09-11-2019 06:33 PM
jlang95
Quote:
Originally Posted by Hydro View Post
Late to the party: Did the smoke happen after you took the injectors apart?
Yes it did
09-11-2019 06:09 PM
Hydro Late to the party: Did the smoke happen after you took the injectors apart?
09-11-2019 05:45 PM
jlang95
Quote:
Originally Posted by bismic View Post
That sounds best!
Got the heads off. Pistons look good. Cross hatching looks great. No abnormal wear. Heads look good as well. I’ll snap some pics tomorrow and get your guys opinion.
09-08-2019 10:38 AM
bismic That sounds best!
09-08-2019 10:15 AM
jlang95
Quote:
Originally Posted by bismic View Post
Blowing raw fuel to the extent it sounds like you are experiencing can cause some major engine damage. You may want to invest in a borescope.

Since you are sure it is oil out the exhaust, it sounds like the turbo is shot along with injector problems and possibly injector related engine damage.
I’m going to pull the heads today bismic.
09-08-2019 09:59 AM
bismic Blowing raw fuel to the extent it sounds like you are experiencing can cause some major engine damage. You may want to invest in a borescope.

Since you are sure it is oil out the exhaust, it sounds like the turbo is shot along with injector problems and possibly injector related engine damage.
09-08-2019 07:59 AM
jlang95
Quote:
Originally Posted by jokester00 View Post
I've always been told, if it's your turbo seals leaking, your Y pipe connection should still be dry. Yours isn't, which means that the liquid is probably coming from further upstream (hint - you just resealed your injectors and you said the smoke smells like raw fuel). I think what you might be seeing as "oil" is actually fuel mixed with soot from the exhaust. That being said, you may also have a bad turbo seal as well, but you need to figure out what's causing the issue upstream of that before you'll know.

Does your smoke look like this:


-jokester
Exactly like that.
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