I just did a head gasket replacement on my 1995 Acura Legend.
Before the replacement, compression was good on all cylinders except #3, which had blown. While the engine was open:
- I cleaned off the pistons and cylinder walls with WD-40 until they were shiny.
- Heads were within flatness spec, and the valves were lapped.
- I didn't do a leakdown check on the valves after lapping them. (though I wish I had now) because I don't have an air compressor, or the right fittings to do a leakdown.
- The block was also within flatness spec.
After putting it back together, I have not been able to get it started.
- I had a timing problem at first, where I had lined up the cams with the timing mark, rather than TDC, and so it wouldn't work.
- I thought it was a fuel problem at first, and probably tried a dozen times to start it with fuel dumping into the engine... oops. Anyway, the engine ended up thoroughly flooded.
- I've removed the spark plugs to let everything dry and have fixed the timing, but still have super low compression on all cylinders (60 psi) and the engine won't start.
After looking around, I'm pretty sure that I have "washed" my cylinder walls to the point that the oil film is gone, which is causing me to lose compression.
My questions are:
- Does my hypothesis sound reasonable? Is there a quick way to confirm?
- I have seen some people recommend dropping some oil or ATF into the cylinder to help create that film again. I am curious to know if anyone had any experience doing that and if it matters that I get it up towards the top of the cylinder? With my engine being a "V" I feel like the oil will all fall to the bottom, and I'll only be partially successful at restoring the oil film.
- How much oil? A tablespoon? Two tablespoons? Or if I just crank for a while without the fuel injectors or spark plugs present will the oil film come back?