SL L4-1.9L SOHC VIN 8 (1997)
9. Place a shop towel over plug holes to capture any oil mist/spray.
10. Crank the engine over for a few seconds without the compression gauge or spark plugs installed.
11. Repeat previous steps 4 through 7 and measure compression.
12. If adding oil increases compression readings: Pistons Rings Leaking: Compression low on first stroke (first gauge puff) and tends to build up on
following strokes, but does not reach normal compression pressure. Improves considerably with oil. Inspect for worn or broken ring(s) and piston
ring land wear (pound out).
13. If adding oil does not increase compression:
^
Valves or Head Gasket Leaking: Compression low on first stroke. Does not tend to build up on following strokes. Does not improve with
adding oil to cylinder.