Subject vehicle is a 95 Bonneville SE 3.8 (3800) Non-Supercharged.
Here'* the VIN: 1G2HX52K6S4264365
I posted to "Everything Electrical and Electronic" an issue which involved stall/not starting on this vehicle. This issue was very much a headache. With each stab at a fix I attempted to get the car started. Most of these attempts involved the spraying of carb cleaner or starter fluid into the intake. On more than one occasion this resulted in minor to major backfires through the intake. Once the issue was resolved, which turned out to be a vacuum leak and fuel pressure regulator problem, I started the car.
This start was not a smooth one as some have been. The idle was so rough that I had to give the accelerator pedal some push. I could feel a definate dead miss in one cylinder that had not occurred on previous test starts. Last but not least someting in the rearview mirror caught my eye, a thick cloud of white steamy smoke. I shut the engine down immedately having reved it to about 1500 RPMs to keep it running hoping the miss was transient and involved getting the fuel back to all injectors.
I pulled the oil dipstick to discover the familar milky coolant mixed with oil.
It should be noted at this point that as part of my prior attempts to reslove the no-start condition I replaced the crankshaft position sensor and since I was in so deep also the timing chain and gears and the inturrupter magnet on the cam sprocket. The replacement timing chain cover gasket is a Fel-Pro product. I used the supplied RTV Black sealant on the gasket.
My first inclination was that I'd blown a head gasket in one of the backfire episodes. I read the Techinfo article regarding the intake manafold degredation and failure along with the details related to the upper manafold gasket failure and coolant getting introduced into the cumbustion chamber and oil pan.
Now my question is this. Given this information, and hopefully it is enough, what has happened? Have I blown out a manafold gasket or have I blown a head gasket or is there some posibility that the timing chain cover gasket was improperly installed and that'* the culpret.
You are a fine group of people and I have appreciated the help with my other issues. Thank you all in advance for the guidance on this problem. Grandpa always said walking ain't crowded but it is inconvenient. And I am afoot while the car is inoperable.