[s-cars] S4 engine replacement

[AUDIJIM at aol.com]

Since I'm going to replace the engine anyway, I have to ask this. While I'm 
gathering the parts for my spare AAN rebuild, I thought I would ask the list(s) 
if they could recommend any type of engine additive to help the AAN currently 
in the car. I don't really believe in snake oil type miracle engine 
additives, but if someone who has tried something in the past with similar problems and 
had some sort of results, I'd be willing to try it. What would I have to 
loose except a few bucks towards the miracle product? As a recap, my engine has 4 
out of 5 cylinders with unfavorable leak down test results. Even though #4 
cylinder was not the worst, while running it causes a dead miss. I have confirmed 
that I have fuel and spark. The compression test even turned good results. So 
I have a piston ring issue since all the blow by was coming from the dip 
stick or the valve cover cap during the leak down test. When I did the compression 
test, I must have had a good seal at that moment and it gave a good yet false 
reading. The engine starts on all 5 cylinders for about a second and then 
drops #4 cylinder. I believe this is because of the residual oil on the piston 
rings is letting the cylinder have a second of good compression. When the engine 
warms up to operating temps is runs a little better and nearly smooth at some 
times, but a quick blip of the throttle while at idle will make it run rough 
again, and it will then clear up and run smooth again, but it never runs 
really smooth and you always feel the miss. So I need some sort of product that 
might help my current running condition, until I replace the engine in a few 
weeks.



Jim