vancexszafranz
New member
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- Sep 13, 2022
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- Buick Ownership
- Regal
Good morning everyone this is my first post! I am currently in the middle of diagnosing my 2015 Buick Regal with the 2.0 Turbo LTG motor. it has about 104,000 miles.
To begin with, the vehicle was driving fine, and threw a solid check engine light. I immediately had it ran and it was a cylinder one misfire. Naturally I got a set of plugs, and replaced them. This seemed to solve the issue, the car ran and drove for another day or so.
I then checked the oil level which was lower but not low, and topped it off. I drove about 100 miles round trip the next day, in which everything went fine until I literally was turning down my street going home and I got a flashing check engine light with the traction light on and the car was shaking some.
I parked it and went to bed. The next morning I decided to replace the coils, and that did not seem to help. I then pulled the plugs and noticed cylinder number one was wet with what looked like oil. The car was not running good at all. I opened the oil fill cap and started the car in which is seemed to have excessive blow by.
I then checked the oil level and noticed it was down to the bottom of the cross hatching mark already after I topped it off the day before.
Currently have done a compression test which led to cylinder #1 20/15 psi cylinder #2 140 cylinder #3 115 cylinder #4 140
Then I did a leak down test and cylinder #1 failed it
I bought a bore scope and went into all four cylinders. Cylinder #1 did not appear to be obviously cracked or broken on top although a fair amount of carbon buildup was found.
I also drained the oil and am going through it in which there is no obvious flake/ debris but it did not look unusual.
At this point I am trying to figure out if it is piston and or ring related or stuck/ bent valve related.
Any input would be greatly appreciated! thank you.
To begin with, the vehicle was driving fine, and threw a solid check engine light. I immediately had it ran and it was a cylinder one misfire. Naturally I got a set of plugs, and replaced them. This seemed to solve the issue, the car ran and drove for another day or so.
I then checked the oil level which was lower but not low, and topped it off. I drove about 100 miles round trip the next day, in which everything went fine until I literally was turning down my street going home and I got a flashing check engine light with the traction light on and the car was shaking some.
I parked it and went to bed. The next morning I decided to replace the coils, and that did not seem to help. I then pulled the plugs and noticed cylinder number one was wet with what looked like oil. The car was not running good at all. I opened the oil fill cap and started the car in which is seemed to have excessive blow by.
I then checked the oil level and noticed it was down to the bottom of the cross hatching mark already after I topped it off the day before.
Currently have done a compression test which led to cylinder #1 20/15 psi cylinder #2 140 cylinder #3 115 cylinder #4 140
Then I did a leak down test and cylinder #1 failed it
I bought a bore scope and went into all four cylinders. Cylinder #1 did not appear to be obviously cracked or broken on top although a fair amount of carbon buildup was found.
I also drained the oil and am going through it in which there is no obvious flake/ debris but it did not look unusual.
At this point I am trying to figure out if it is piston and or ring related or stuck/ bent valve related.
Any input would be greatly appreciated! thank you.