Hello, new here... I was given a trailblazer to turn into an off-road rig and finally got it home to get it workin. Details:
2006 Trailblazer LS
i6 4200 Vortec
4WD
(not sure what else is helpful?)
It was parked in early 2020 due to engine noise and no power. My father in law suspects it is a plugged catalytic converter but I'm not sure on that.
Here is a video of it running before I opened up the head. What I was hearing seemed to be a bit more random than just with Engine RPM's. Definitely in the top of the engine, and I believe back in Cylinder 5/6 area of the head.
However, I've since gotten the valve cover off and my initial suspicion of issues with the valves/rollers/etc. seems to be fine. The rockers are tight on all of them except some wiggle ever so slightly. I suspect this is just due to cam position, agreed?
Now, my biggest question is "is this timing chain too loose"?
Or is that normal play in a timing chain?
The PCV tube sure barfed oil all over the top of the valve cover... I hear this can cause some uglyness with these Atlas engines
I also suspect the VVT Solenoid may be having issues. I've previously seen one way to check the health of it quick is "is the electrical connector full of oil?" and no, mine is dry.
I plan to take the VVT solenoid off today if I can and test/clean it.
2006 Trailblazer LS
i6 4200 Vortec
4WD
(not sure what else is helpful?)
It was parked in early 2020 due to engine noise and no power. My father in law suspects it is a plugged catalytic converter but I'm not sure on that.
Here is a video of it running before I opened up the head. What I was hearing seemed to be a bit more random than just with Engine RPM's. Definitely in the top of the engine, and I believe back in Cylinder 5/6 area of the head.
However, I've since gotten the valve cover off and my initial suspicion of issues with the valves/rollers/etc. seems to be fine. The rockers are tight on all of them except some wiggle ever so slightly. I suspect this is just due to cam position, agreed?
Now, my biggest question is "is this timing chain too loose"?
Or is that normal play in a timing chain?
The PCV tube sure barfed oil all over the top of the valve cover... I hear this can cause some uglyness with these Atlas engines
I also suspect the VVT Solenoid may be having issues. I've previously seen one way to check the health of it quick is "is the electrical connector full of oil?" and no, mine is dry.
I plan to take the VVT solenoid off today if I can and test/clean it.