Quote:
Originally Posted by t walgamuth
after the soaking i would pull the car to get it started. then i would drive it out on the highway for a couple of hours. i would put a quart or so of marvel mystery oil in the fuel along with some injection cleaner. this might well clean the rings out if they are gunked up.
then i would try the compression test again.
tom w
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I like tom's ideal if the rings will not loosen up enough to start the car. The reason I am posting this morning was to mention that at lower temperatures almost any type of chemical will not be very active. You can use the block heater to keep the temperature high enough to allow the mystery oil to have a chance. Or leave the car in a heated space. Outside at say 40 F or lower is almost useless. I think below about 60 deegrees F chemical action becomes extremely slow to non existant. I also think the block heater might produce a cylinder temperature of seventy or more if it is not too cold where you are. Higher would even be better.