i put the title in capital letters because it makes it more important lol.
So my friend flips cars, he usually does japanese and american gas vehicles with a few ford diesels mixed in the bunch.
he recently bought an lb7 duramax with 250k miles from a guy who had a mechanic rebuild the motor, not long after the truck had tons of white smoke coming from the engine bay and didnt want to **** with it, so he sold it to my buddy for a very reasonable price all things considered.
he called me cause i know more about these motors than him but i had never seen this much white smoke at idle before. so much smoke its hard to trace.
need some help diagnosing. Here is what i noticed/know.
-smoke smells like diesel.
-smoke in engine bay increases when rpms are increased.
-number 8 cylinder is misfiring says scanner, but motor doesnt sound terrible(dont have fancy scanner for balance rates)
-original owner says compresion tested well
-intake leak also appeared as a code
-smoke appears to be coming from driver side, and when i saw the code for misfire i wanna say it could possibly be coming from toward driver side toward firewall(around number 8)
-upper rad was soft, no head gasket leak
-engine builder used some shitty gasket maker on upper valve cover
possibilities i believe:
is it possible the sleeve these lb7's have around the #8 injector could no be seated properly and leaking the smoke after it is burned in the injector? as instead of going out of exhaust port it is being pushed out and through sleeve? the smoke increases with rpms, so as the engine works more, it is pushing more smoke out around sleeve, and them out a little gap in the shitty gasket maker.
please let me know. i know it has to do with the shitty engine build im assuming it received.
i told him to find a good scanner and get balance rates first, but the misfire is making him want to pull the upper and lower valve cover off and get to the #8 injector first.
its a lot of smoke so i am just trying to think of possibilities.
thanks,
Hank
So my friend flips cars, he usually does japanese and american gas vehicles with a few ford diesels mixed in the bunch.
he recently bought an lb7 duramax with 250k miles from a guy who had a mechanic rebuild the motor, not long after the truck had tons of white smoke coming from the engine bay and didnt want to **** with it, so he sold it to my buddy for a very reasonable price all things considered.
he called me cause i know more about these motors than him but i had never seen this much white smoke at idle before. so much smoke its hard to trace.
need some help diagnosing. Here is what i noticed/know.
-smoke smells like diesel.
-smoke in engine bay increases when rpms are increased.
-number 8 cylinder is misfiring says scanner, but motor doesnt sound terrible(dont have fancy scanner for balance rates)
-original owner says compresion tested well
-intake leak also appeared as a code
-smoke appears to be coming from driver side, and when i saw the code for misfire i wanna say it could possibly be coming from toward driver side toward firewall(around number 8)
-upper rad was soft, no head gasket leak
-engine builder used some shitty gasket maker on upper valve cover
possibilities i believe:
is it possible the sleeve these lb7's have around the #8 injector could no be seated properly and leaking the smoke after it is burned in the injector? as instead of going out of exhaust port it is being pushed out and through sleeve? the smoke increases with rpms, so as the engine works more, it is pushing more smoke out around sleeve, and them out a little gap in the shitty gasket maker.
please let me know. i know it has to do with the shitty engine build im assuming it received.
i told him to find a good scanner and get balance rates first, but the misfire is making him want to pull the upper and lower valve cover off and get to the #8 injector first.
its a lot of smoke so i am just trying to think of possibilities.
thanks,
Hank
