Winter Lubrication

Combustion in any engine produces water vapor. When starting and warming up in cold weather, much of the vapor that gets into the crankcase condenses to water before the crankcase is hot enough to exhaust the vapor through the outside breather. If engine is driven enough to get the crankcase thoroughly warmed up, most of this water is again vaporized and blown out through the breather. However, a moderately driven engine making short runs, does not thoroughly warm up and is likely to accumulate water in the oil tank. In freezing weather, this water will become slush or ice, and if allowed to accumulate too long, may block the oil lines and cause damage to the engine. Water mixed with oil for some time also forms sludge that is harmful to the engine and causes undue wear of working parts.

In winter the oil change interval should be snorter

1. Filter clip

2. Cap seal washer

3. Filter element

4. Filter lower retainer

5. Cup spring

6. Cup seal

9. Dipstick and valve assembly

10. Cap gasket

11. Cap cotter pin

12. Cap screw

13. Cap washer

14. Cap nut

15. Cap top

Figure 3A-5. Oil Tank Filter - Exploded View than normal, and any engine used only for short runs, must have oil drained frequently along with a thorough tank flush-out, before new oil is put in tank. The farther below freezing the temperature drops, the shorter the oil change interval should be.

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