u/Environmental_Egg843

▲ 4 r/Duramax+1 crossposts

Exhaust leak or Fucked valvetrain?

Made a post earlier but I can’t edit it and add another video. You can hear it pretty well in this video. It definitely smells like an exhaust leak and I do feel a pulsing behind the egr blocker plate. But I can’t really determine it. I don’t want to run the truck for too long if it is something worse. Anyone have any ideas?

u/Environmental_Egg843 — 7 days ago

Random tick

-SOLUTION- so turns out the exhaust leak I was hearing was coming from the injector. The exhaust gas was getting passed the injector copper crush washer. Apparently those are common to fail. But then I also check the injector brackets?(not sure if that's what they are called) and they were loose. So i tightened the injector bracket down more and the problem went away. Motor still sounds healthy. I will still have to pull the injectors and put new seals in them and replace the injector bracket bolts. But I call that a win

Did a little pull, and I’m hearing this clacking noise only on the right side of the motor. Sounds valve train related and the noise does get faster as I increase rpm. Anybody have an issue like this? Unfortunately I have to drive it home.

Now that I’m listening to it and looked around. It’s an exhaust leak of some sort. It’s coming off right next to the egr exhaust blocking plate.

I’ll post more updates as I go

u/Environmental_Egg843 — 7 days ago
▲ 39 r/Duramax

Roof Marking lights.

Has anyone installed roof marking lights that didn’t come stock from the factory? If so any recommendations on what company to go through?

u/Environmental_Egg843 — 10 days ago
▲ 3 r/Duramax+1 crossposts

2018 GMC Sierra L5P 3.5 inch Downpipe

I will start this by saying I will explain this the best I can.

I recently ordered a full exhaust/downpipe and egr delete kit from suncent auto. My truck is used for offroad use only.
Everything was going smoothly until it was time to put the new downpipe in and vband clamp it to the turbo. I have done many attempts with the turbo in the truck and with the turbo taken out of the truck. The issue is that the vband clamp doesnt seem to clamp both the turbo and the downpipe. It seems like there is too much of a gap between the turbo and the downpipe even though the downpipe is pressed against the turbo. I dont know if it is an issue with the downpipe having too much metal past the flange? Or if I am supposed to cut it to length? Not really sure there isnt any manuals online or instructions.

Has anyone else had any issues with this? I reached back to suncent auto and they told me a technician will reach back out to me in 12 hours. Also, I was unable to find any tips or tricks to see if it is user error and not the part.

SOLUTION: Following up a day later on the solution. SO I just trimmed 1/4inch off the metal that extends past the downpipe vband flange. It was just too long which made the gap to vband clamp to wide. Once I did that the flange mounted perfectly! If anyone needs help you can pm me. Thank you all.

reddit.com
u/Environmental_Egg843 — 16 days ago