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Its coolant disguised as oil. TSB 20-NA-166 - 20-NA-166 1..3 "To inspect for this concern, add coolant dye to the system, run the engine through warm up, pressurize the cooling system after warming the engine to operating temperature (let the engine cool overnight) and inspect the suspect cylinder with a borescope for coolant dye evidence. At times it may be necessary to remove the head for inspection. If the head casting line is the concern, the intake port will be wet with a coolant oil mix" -
By asilverblazer · Posted
Can you sample the pooled liquid, enough to confirm it is oil? ...That its not fuel or coolant. Also, make sure combustion gases aren't entering the cooling system. Simply put, either oil being pushed up past the rings (this really isn't possible), oil leaking past the head gasket, oil leaking past the valve, oil entering through the intake air path. If none of this is likely - it may not be oil. What could be likely is the fuel injector leaking down. A puddle of gas would still smoke and rough idle. (Same cylinder has the same problem after injector replacement?) What is the crank time first thing in the morning, when the puddle would be present? Does it seem like the high pressure fuel pump needs an extra second or two to rebuild the pressure that injector 8 may have let bleed off? Check the fuel pressure via a scanner prior to starting the engine. -
Good information! I didn't know about the dementia aspect and asked for a general for my second knee. I'd heard that recovery room time is usually shorter with a general. The anesthesiologist talked me out of it and I had the spinal. Inconvenience and/or discomfort is a small price to pay for reduced risk! -
This is for those over 70 years of age contemplating joint replacement surgery involving general anesthesia. Even some 55 yrs. ago when I took my pharmacology class the dangers of developing dementia in the elderly that had general anesthesia were beginning to be recognized. Over the years there has been some refinement in the cautionary warnings, avoid general anesthesia if possible if you've had close to 10 priors, especially over the age of 70 and/or a family history of dementia. I'm not including the twilight anesthesia induced by propofol often used in cytoscopies or colonscopies. Seriously think about seeing a neurologist and undergo cognitive testing before proceeding if any of those criteria apply to you. Spinal anesthesia may be an option in some cases. I'm in the above camp and although I could use a new right knee, I get fidgety according to a prior orthopedic surgeon when the bone saw spools up or maybe it was the smell of saw blade meeting bone, anyhow I may have one general anesthesia left in me which I will pocket for now and I'm choosing mind over mobility, anyway where did I leave my damn cane! -
By GMCustomerService · Posted
We understand your frustrations with your auto start/stop, fuel gauge and cruise control concerns since your latest update, @LarT-26. You mentioned getting repairs completed, however, have your concerns been resolved? If not, we would like to learn more so we may explore the best path of assistance moving forward alongside your local dealership. When you have a moment, please visit: https://s.gmc.com/support-request and complete the request form with all pertinent details. This will help us to better understand your concern and ensure that it is routed correctly. We will keep an eye out for your outreach.
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