Ok so I have a 2006 V6 STS that just hit 100k a few days ago. I was on the parkway yesterday doing about 65-70mph when I began to hear a loud ticking noise. I immediately pulled over and upon slowing down the car stalled out at around 30mph. I had to have the car towed as it would not crank at all. I have always changed oil regularly and checked & maintained levels as I know these cars are notorious for burning oil.
My mechanic is telling me that the engine is sludged and I would need to get a new engine. He told me he could not even get the engine to crank. My question to you guys is there any way you think this motor is salvageable or am I at a total loss? I would appreciate any input, thanks.
In the old days you could drain the oil , refill with 5 or 6 qts of Kerosean what ever yours holds. Turn the engine over (without the plugs in) with a breaker bar on the crank until it was loose. drain the kerosean refill with oil and see what happens. Now I dont know what you could expect. It might work . What do you have to loose, but time.
I may be no fan of the V6 but that's surprising and I'm sorry to hear of it. It sure sounds more like catastrophic oil loss than 'sludge'. If you used oil with the correct GM rating and SAE weight, checked it regularly (adding reasonable amounts when needed) and changed it according to the OLM, there is no good reason to expect this trouble.
I admit you are not the first forum member to report this from a V6, but catastrophic oil loss is still pretty rare overall and very rare with reasonable care such as described. Even the worst cases don't burn much oil until after other oiling issues and/or un-tended oil loss cause collateral damage. Some members contend that other than some early design weaknesses and a batch of bad chains, most of the timing chains issues can be avoided with an anti-foaming mod.
Car forums usually have more posts with bad news than good, just from human nature. When all is well, we are living life and not so motivated to write a post about something that worked just fine. Now bad stuff? That motivates people!
Anyway, I hope your luck turns. Maybe you'll find a good used or rebuilt replacement engine.