Differences
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techtalk:ref:oil15 [2019/06/13 02:26] hippysmack [Testing at the rocker box] |
techtalk:ref:oil15 [2019/06/13 02:28] hippysmack [Testing at the rocker box] |
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| * On a cold startup, the pressure is higher due to the thicker oil present. | * On a cold startup, the pressure is higher due to the thicker oil present. | ||
| * As the engine warms up, the oil thins out and the pressure is reduced in the rocker boxes. | * As the engine warms up, the oil thins out and the pressure is reduced in the rocker boxes. | ||
| - | * Excess crankcase pressure (air and oil mist) is vented differently between pre and post 91 engines. | + | * Pulsating crankcase pressure (air and oil mist) is vented differently between pre and post 91 engines. |
| * On pre 91 engines, excess crankcase pressure is vented through the cam cover. | * On pre 91 engines, excess crankcase pressure is vented through the cam cover. | ||
| * On post 91 engines, excess crankcase pressure is routed up the pushrod tubes and vented thru the rocker boxes to exit a hole in each head. | * On post 91 engines, excess crankcase pressure is routed up the pushrod tubes and vented thru the rocker boxes to exit a hole in each head. | ||
